: No Heat



css28
10-21-2013, 08:28 AM
Add me to the list of 2013's with no heat this morning. Playing around with remote start yesterday I managed to preheat the interior but this morning on the way to work only cold air. It seams as if the auto seat heat is also unresponsive (though I can use the the seat heat button to work every time).

I read somewhere in here that 2013 Volts assembled after March 21 should be unaffected by the problem but I think mine was built in April.

I've set a PM to Ian to be connected with a Volt advisor.

ClarksonCote
10-21-2013, 09:12 AM
I don't think the Auto is non-responsive, it does respond when it's cold enough. The problem is that, the way these seats are designed, they won't "feel" warm even if the auto (or manual) has been on until you're sitting in the seat.

css28
10-21-2013, 09:20 AM
The auto seat heat is really just a nit. I expect to control that as needed manually.
I *was* able to make it respond a few weeks ago by incrementing the target temp to 74°+ a couple of weeks ago when the outside temp was in the 30's but not anymore.

shoemakj
10-21-2013, 11:31 AM
I have a Feb 2013 build (according to the sticker on the door jamb) and today was the first day it was cool enough to try the heat. So far, it's working. Every morning this week will be cooler than the previous, so I'll see how long it lasts.

css28
10-21-2013, 11:40 AM
I got onto OnStar to see if they could read any codes and there were none.

A little disappointing was that the OnStar Volt team guy told me that I'd be best off running the ICE if I wanted heat.

black88mx6
10-21-2013, 11:48 AM
I have an April 2013 build volt also and I noticed that the heat does not seem to be working on mine either.

First when I turn the heat all the way up to HI in auto, I see the heat icon come on, and I watch the AC icon go on and off even though I have Auto Defrost turned off in settings. It never gets warm in either ECO or Comfort.

Another item that may be related, I have the seat heaters set to Auto, regardless how high I set the temp, they do not come on. They are showing as in Auto mode. They will come on if I manually turn them on.

Since I had a 2012 Volt, I know that these items worked correctly in that car, and worked well.

I am going to start reading though all the heat related threads and come up with my next steps.

peteewheat
10-21-2013, 12:46 PM
Don't bother with a Volt Advisor. All they will do is setup an appointment for you. Take it in to your dealer to get the software updated. I think its up to bulletin PIC5796B now. Then, when it stops again, rinse and repeat. You may even get some hardware replaced on one of your visits. GM really needs to get their act together on these heating issues. I am not going to feel sorry for my dealer if mine stops working again.

gsepelak
10-21-2013, 02:58 PM
My wife and I went on a road trip through the mountains a few weeks ago and also experienced difficulty getting any heat from either ECO or Comfort settings. As we approached the range, I switched to mountain mode. After the engine was on for a few minutes, I finally got heat.

I contacted the Volt Advisor via chat. I am expecting a return call from a specialist.

black88mx6
10-21-2013, 03:11 PM
I have scheduled an appointment with my local dealer this Sat. Will see if any of the software updates help. If they recommend replacing any hardware I will defer that to another time once I know this issue is resolved for sure with a hardware fix.

avalys
10-21-2013, 03:13 PM
One suggestion I have is to manually select the dashboard vents in the climate control settings, as opposed to leaving that on auto (you can leave the fan speed on auto). This way you actually get warm air blowing on your face, hands and arms. Somehow, my 2013 does not blow warm air out those vents on auto in EV mode, it sends it all into defroster and the floor vents, which mostly just produces a cold draft in the car, especially for relatively short trips and Eco.

ballen1923
10-21-2013, 04:01 PM
Add me to the list of 2013's with no heat this morning. Playing around with remote start yesterday I managed to preheat the interior but this morning on the way to work only cold air. It seams as if the auto seat heat is also unresponsive (though I can use the the seat heat button to work every time).

I read somewhere in here that 2013 Volts assembled after March 21 should be unaffected by the problem but I think mine was built in April.

I've set a PM to Ian to be connected with a Volt advisor.


I have a May 2013 built Volt, and have had reliable heat each time for the past couple of weeks, until last Thursday morning (the coldest day of course). On just that ONE morning I had cold air continuously on a 15 mile trip, heat set to Auto and Hi. Nothing worked...just cold air blowing. Contacted the dealer tech....clueless. Contacted Volt adviser, not much info either. Their suggestion was to turn off the car, lock it, and with the remote go about 200 feet away, for about ten minutes. As it turned out, and by coincidence, I did go into a high rise building, that far away, and for that amount of time. When I returned, the car had heat, and I have not had a problem since. According to the Volt Adviser, this forces the system to reboot. But since it has just happened only one time, it is impossible as of today to know the cause and/or fix (if any). As information there is a new software update for the the "power inverter module" which my Volt Adviser emailed me about, just last Friday. I have an appointment to take it in this Wednesday. However, this update is UNRELATED to the heat issue. From what I understand heat related software updates mentioned here do not apply to my vehicle. Here is what my Volt Adviser had to say on the heat issue:

"The bulletin suggested by the forum as a solution to this issue is not being considered for you at this time. First, your Volt does not fall within the "build-date" parameter, but more importantly, this bulletin was designed for customers who experience this situation Intermittently. If I am correct, there has only been one occurrence for your Volt."

Good luck!

black88mx6
10-21-2013, 04:05 PM
I took mine off auto, and put it on dash vents only; for what ever reason it still wanted to continue to put the majority of air up to the defrosters. This is not how it worked on my 2012, and should not work this way on a 2013 after taking it out of auto.

Hank101
10-21-2013, 06:12 PM
I am in the "hardware replacement" phase for my "no heat" problem (MY2013), however, the required part (heater control module) is on backorder due to high demand. I/others have been through the "updates" and the problem still exists. With what I have learned about this issue, and with cooler temps on the way, I suspect this will become the year of the "Volt Heater Problem".

I/others have posted details for symptom and dealer visits in numerous threads, below are a few. I believe that Chevrolet Tier 2 techs pretty well understand the issue/resolution, but it is unlikely that you dealer does. Read-up, and maybe you can help educate your dealer's service department and shorten the chase, minimize the frustration. I have to remind myself that being a technology "early adopter" often comes with a little risk/inconvenience. But now that we have progressed to mechanical "solutions", I only hope to have this resolved without encountering "collateral damage" from my dealer's service department

http://gm-volt.com/forum/showthread.php?78905-Definitive-Answers-on-Pre-Conditioning-(Remote-Start)

http://gm-volt.com/forum/showthread.php?76378-Intermittent-heat-turning-into-a-longer-story-...

http://gm-volt.com/forum/showthread.php?74802-Heater-blows-only-cold-air

http://gm-volt.com/forum/showthread.php?18655-No-electric-heat-yesterday-3-start-cycles-but-fine-today

http://gm-volt.com/forum/showthread.php?23649-100-Climate-Power

http://gm-volt.com/forum/showthread.php?42537-Electric-Heater-Issue

http://gm-volt.com/forum/showthread.php?37898-Optimal-Settings-for-240v-Preheat

css28
10-22-2013, 07:51 AM
Update:
I dropped the car off this morning. The service advisor thanked me for mentioning that there was a flash update for the heating issue (so I guess he's not familiar with it). The dealership's computer flagged the car for an inverter software update which is a full-fledged recall so that will be performed. Strange that I didn't get a recall notice in the mail for that.

Props to Ed Rinke Chevrolet for a service department that opens at 6:30 AM!

css28
10-22-2013, 01:40 PM
Well I've got it back. Updates have been performed (but without update numbers on the work order).
Crossing my fingers...
Lost a few miles off of the battery charge so I'll have to run the ICE to get home :-(

black88mx6
10-22-2013, 01:46 PM
Please post some pics of your Software Version Information Screen; this can be found under config/radio at the bottom.

css28
10-22-2013, 04:46 PM
Please post some pics of your Software Version Information Screen; this can be found under config/radio at the bottom.

Please describe how to do this.

black88mx6
10-22-2013, 04:52 PM
Use center console config, select radio config options; go all the way to the bottom and you will have an option that says "Software Versions". Select and you will get screens that look like this.

(if your standing on your head) :)

css28
10-22-2013, 07:33 PM
Here you go:

http://i1342.photobucket.com/albums/o768/packmule28/Volt%20Shots/6A571B5B-0CAD-4889-B7C6-6392B0F6CCBB-1291-000001F6FECF126B_zpsb9290d44.jpghttp://i1342.photobucket.com/albums/o768/packmule28/Volt%20Shots/6ABF6E22-8853-474D-8D2B-4990D9690FBD-1291-000001F738F53F8C_zpsdfc6bfe8.jpghttp://i1342.photobucket.com/albums/o768/packmule28/Volt%20Shots/0AD3DA7B-92ED-467A-B454-F4838FED5C73-1291-000001F748E95D26_zps1b2e934e.jpghttp://i1342.photobucket.com/albums/o768/packmule28/Volt%20Shots/91DBE5EF-987E-49B1-BA95-C5AB0B0F9AF3-1291-000001F7565D5102_zps734784ff.jpghttp://i1342.photobucket.com/albums/o768/packmule28/Volt%20Shots/747D3912-F9D5-41EE-8492-1F451086BA44-1291-000001F761E694D5_zps085bf32e.jpg

Hank101
10-22-2013, 08:15 PM
css28,

Have you verified that your heat issue has been fixed with the updates?

black88mx6,

Do you know what any of these update numbers/versions mean? I checked mine and a few are different or missing from css28's list.

css28
10-22-2013, 08:51 PM
css28,

Have you verified that your heat issue has been fixed with the updates?


It will take a few days to know, perhaps. While it was not working yesterday morning, it did work in the afternoon and on the way to the dealer this morning. It worked when I picked it up but I didn't use the heat going home because it was sunny enough to not need heat. I ended up doing 4 miles in Hold mode to get home since the dealer used up some battery and didn't charge it at all.

Very disturbingly the center stack spontaneously rebooted on the way home, a first for this car.

The coming days will be chilly so I'll have the chance to try the heater every morning at least.

Hank101
10-22-2013, 10:18 PM
Sorry to hear about the center stack re-boot, perhaps a one time occurance. I seem to recall a similar situation right after I purchased mine.

While I still have the intermitent heat issue (waiting for parts), I can still go for several days before encountering the no-heat condition. I find that it most often fails to heat when trying to pre-condition, then for any distance/time immediately after - but not alway in this sequence.

Thanks, and please keep us informed of your findings.

css28
10-23-2013, 07:39 AM
Well the heat worked for the first 10 miles this morning then went cold. 37° outside temperature.

I've sent an e-mail to the service advisor at the dealership and I'm going to call the Volt advisors to try to talk to my Volt advisor. I've been told who it is, but haven't talked to her yet.

BMR_Volt
10-23-2013, 08:19 AM
Does anyone else think maybe they just went too complicated with the heater? I mean a $20 hardware store ceramic heater with a fan that only draws 1500w would make the car seem like a sauna inside within a matter of minutes. This drawing of 5000w from what I read around here seems absurd. These heater issues are starting to make me nervous. If our new car arrives with heater issues I will be in the dog house all winter.

css28
10-23-2013, 09:49 AM
Does anyone else think maybe they just went too complicated with the heater? I mean a $20 hardware store ceramic heater with a fan that only draws 1500w would make the car seem like a sauna inside within a matter of minutes. This drawing of 5000w from what I read around here seems absurd. These heater issues are starting to make me nervous. If our new car arrives with heater issues I will be in the dog house all winter.

The heaters apparently work OK in the 2011 and 2012 vehicles. The current design can be made to work.

My service consultant replied to my e-mail to state that they'll be co-ordinating with the Volt Team on the next course of action. He gave me the name of the service tech involved and promised that they'd follow up as they got direction from GM and/or the Volt Team.

Hank101
10-23-2013, 05:41 PM
css28,

Sorry to hear that you still have the "intermittent heat" issue, but am not surprised. At least it infers commonality in symptoms with mine/others situation.

Sound like you are on the right track now - people talking. If you find the appropriate point in time in conversation, with either of the two, it may not be a bad idea to drop hint that you hear of others with a similar issue, and that resolution was achieved via technical direction from Chevrolet Tier II technical support.

css28
10-23-2013, 05:51 PM
I spoke directly with my Volt advisor this morning and she was going to inject herself into the process.

voltman2013
10-23-2013, 07:36 PM
I had the same problem, the dealer had to replace my aux heater for when its on battery

begreen
10-23-2013, 08:01 PM
I had the same problem, the dealer had to replace my aux heater for when its on battery

Our 2013 is another with this issue. I have tried every combo from full auto to totally manual and the heat still comes on randomly. I have tried to preheat the car for 10 minutes while plugged in and come out to a stone cold car. It doesn't matter what the anything seems to be set to. All the while the climate control says it is using 100% power and our drop in mileage seems to confirm this, but as far as the heat getting into the passenger compartment it is totally random.

Another thing, how do you turn off the recir air? I have to drive with a window slightly cracked to stop the windows from constantly fogging up. And this is with a garaged car. This has to get fixed. We can't use this car like this in the winter.

danno58
10-23-2013, 09:28 PM
Just bought my 2013 Volt in September. It has a build date of 5-13. After reading the threads about the heat issues I thought I better check mine. Started the car while plugged in the 240 charger and let it run for about 10 mins. with the settings set for comfort @ 88 deg. With fan set on high. Auto defogger is off and so is auto control. Nothing but cold air blowing out of the vents. The heat icon was on but the ac keeps turning off and on. So far from reading the threads this is a quite common defect. Is there a fix that GM has or am I stuck with a 40000.00 car that doesn't have heat? Absolutely love everything else about the car but this is not acceptable.

css28
10-23-2013, 09:35 PM
Another thing, how do you turn off the recir air? I have to drive with a window slightly cracked to stop the windows from constantly fogging up. And this is with a garaged car. This has to get fixed. We can't use this car like this in the winter.

If the auto recirc button is lit you press it to undo it. If neither recirc button is lit you're taking in outside air. Having reliable heat (even just into the 60's) should take care of te fogging if you turn te recirc off.
Also be sure you clean the inside window surfaces. The interior plastics in new cars outgas a lot when they're parked in the sun over the summer. Things fog up much faster if they haven't been cleaned lately.

Hank101
10-23-2013, 10:18 PM
Is there a fix that GM has or am I stuck with a 40000.00 car that doesn't have heat? Absolutely love everything else about the car but this is not acceptable.

The "intermittent heat" issue is real, recently diagnosed as a mechanical issue for many, apparently fixable, and is increasing in occurrence (onset of cooler temps). A number of us have been through the diagnosis "exercise" with our dealers service departments, including updates, and now await shipment of a "heater control module", which is on backorder to dealers due to high demand.

For more information on symptoms and best recourse, read through the following threads. I suggest that you contact both your service department manager and Volt Advisor, describe your problem, share details/experiences from this forum, and ask them to contact one another and initiate a path forward towards remedy, while keeping you informed. While there appears to be a common trend for the updates alone not fixing the problem for many of us, requiring the HCM be replaced, your specific heat issue may require a different solution - this will require that the service department run through their diagnostic "routines" (trial and error visits). By keeping them up to date, via the Volt Advisor and your input, you may shorten your wait for a fix.

http://gm-volt.com/forum/showthread....-(Remote-Start)

http://gm-volt.com/forum/showthread....-longer-story-...

http://gm-volt.com/forum/showthread....-only-cold-air

http://gm-volt.com/forum/showthread....but-fine-today

http://gm-volt.com/forum/showthread....-Climate-Power

http://gm-volt.com/forum/showthread....c-Heater-Issue

http://gm-volt.com/forum/showthread....r-240v-Preheat

http://gm-volt.com/forum/showthread....3-Heat-No-Heat

crackers8199
10-24-2013, 09:53 AM
Add me to the list, I suppose...this morning was the first very cold morning, so I thought I'd give the heat a try. Turned it all the way to hi, and got only cool (tepid at best) air. Once I got to where I was going, on the way back I used hold mode and had heat nicely...but no heat while in electric mode.

css28
10-25-2013, 07:37 AM
No heat again this morning but I've gotten happily acquainted with the heated seat.

A couple of points:
- The power indicator ball on the climate control screen is clearly just a formula based number determined by the settings selected.
- With Comfort and 76° selected (and the air out of the ducts cold as can be) there's no indication that the system is actually drawing more current than in Fan Only. I keep the power flow screen up below the speedometer and sitting at a traffic light it was at its usual 0.5 kW level.

ari_c
10-25-2013, 09:39 AM
I drove with no heat as well this morning. Of course mine was out of choice. I always drive 100% EV so that means on my 40 mile r/t commute I drive as efficiently as possible, especially now that it is starting to get cold again.

I honestly do not mind driving with a coat and gloves. Now when my wife is in the car she has a few ridiculous requirements like heat and air-conditioning. I don't understand :).

mroletta
10-25-2013, 09:49 AM
Hank, your links don't seem to go anywhere, FYI. It looks like when you copied the lot of them from another post, it didn't copy the URLs correctly since they are abbreviated with dots in the middle:

http://gm-volt.com/forum/showthread[....]3-Heat-No-Heat

css28
10-25-2013, 11:05 AM
The dealer tech says he has a fix. I'm taking the car back in Monday morning.

black88mx6
10-25-2013, 11:46 AM
The dealer tech says he has a fix. I'm taking the car back in Monday morning.

Now is it a hardware fix or software? I guess we will find out.

css28
10-28-2013, 07:51 PM
The dealer had the car all day today. When I picked it up they stated that they were leaving the ticket open (I didn't have to sign anything) and gave me a copy of the work order with the following written in, by hand:
"Perf OBDII system scan code B101D. Diag and rep coolant Heater control module top off coolant test drive good perf."

Everything worked OK on the drive home. Prior to this visit the heat was working about half the time.

We'll see how things go.

Hank101
10-29-2013, 05:48 AM
The dealer had the car all day today. When I picked it up they stated that they were leaving the ticket open (I didn't have to sign anything) and gave me a copy of the work order with the following written in, by hand:
"Perf OBDII system scan code B101D. Diag and rep coolant Heater control module top off coolant test drive good perf."

Everything worked OK on the drive home. Prior to this visit the heat was working about half the time.

We'll see how things go.

Does "rep" mean that they "repaired" or "replaced" the heater control module?

css28
10-29-2013, 06:21 AM
I doubt any modules are repairable.

css28
10-29-2013, 09:22 AM
Well, pre-conditioning worked wonderfully this morning. I don't think I ever had such a successful precondition before.

I'll let everyone know if it fails me but so far, so good.

oolowrideoo
10-29-2013, 09:31 AM
Well, pre-conditioning worked wonderfully this morning. I don't think I ever had such a successful precondition before.

I'll let everyone know if it fails me but so far, so good.
Great to hear... following closely as I'm tired of being cold. Anyone know what the B101D code relates to?

ClarksonCote
10-29-2013, 11:06 AM
Great to hear... following closely as I'm tired of being cold. Anyone know what the B101D code relates to?

I'd love to hear more here too.

css28
10-29-2013, 11:15 AM
Random googlage turns up the following family of B101D errors:

DTC B101D 00: Electronic Control Unit Hardware



DTC B101D 04: Electronic Control Unit Hardware Open



DTC B101D 08: Electronic Control Unit Hardware Performance - Signal Invalid



DTC B101D 0F: Electronic Control Unit Hardware Signal Erratic



DTC B101D 12: Electronic Control Unit Hardware Low Input



DTC B101D 13: Electronic Control Unit Hardware Low Voltage/High Temperature



DTC B101D 14: Electronic Control Unit Hardware High Voltage/Low Temperature



DTC B101D 1A: Electronic Control Unit Hardware Performance - Bias Level Out of Range



DTC B101D 2B: Electronic Control Unit Hardware Missing Reference



DTC B101D 2C: Electronic Control Unit Hardware



DTC B101D 31: Electronic Control Unit Hardware Internal Checksum Error



DTC B101D 32: Electronic Control Unit Hardware General Memory Malfunction



DTC B101D 34: Electronic Control Unit Hardware RAM Malfunction



DTC B101D 35: Electronic Control Unit Hardware ROM Malfunction



DTC B101D 36: Electronic Control Unit Hardware EEPROM Performance/Malfunction



DTC B101D 37: Electronic Control Unit Hardware Software Malfunction



DTC B101D 38: Electronic Control Unit Hardware Supervision Software Malfunction



DTC B101D 39: Electronic Control Unit Hardware Internal Malfunction



DTC B101D 3A: Electronic Control Unit Hardware Incorrect Component Installed



DTC B101D 3B: Electronic Control Unit Hardware Self-Test Malfunction



DTC B101D 3C: Electronic Control Unit Hardware Internal Communication Malfunction



DTC B101D 43: Electronic Control Unit Hardware EEPROM Incorrect Programming



DTC B101D 73: Electronic Control Unit Hardware Parity Error



DTC B101D F0: Electronic Control Unit Hardware



DTC B101D F1: Electronic Control Unit Hardware

css28
10-29-2013, 12:06 PM
Did a quick lunchtime check. Outside temp: mid 40's. Set the temp to 75° and put it in Auto Comfort mode.

Within a minute, noticeable warmth coming from the ducts. More tellingly, the power flow display showed 4 - 5 kW power draw compared to 0.5 kW with the system on Fan Only.

oolowrideoo
10-29-2013, 12:29 PM
Did a quick lunchtime check. Outside temp: mid 40's. Set the temp to 75° and put it in Auto Comfort mode.

Within a minute, noticeable warmth coming from the ducts. More tellingly, the power flow display showed 4 - 5 kW power draw compared to 0.5 kW with the system on Fan Only.

Unfortunately, the description the dealership provided is vague... I'm tempted to travel to the East side of Michigan to visit your dealer and have them perform the same service.

css28
10-29-2013, 05:34 PM
Nice drive home. I did a blip of Comfort mode to check the power flow indicator while stopped at a light then selected 70° ECO Auto for the rest of the way home.
Feeling really good about this.

Hank101
10-29-2013, 06:23 PM
Nice drive home. I did a blip of Comfort mode to check the power flow indicator while stopped at a light then selected 70 degrees ECO Auto for the rest of the way home.
Feeling really good about this.

Sounds promising!

PhilKatz
10-30-2013, 07:48 PM
My Volt w/ April 23 2013 assembly is still similarly affected even after first round of software updates.

PhilKatz
10-30-2013, 08:01 PM
One suggestion I have is to manually select the dashboard vents in the climate control settings, as opposed to leaving that on auto (you can leave the fan speed on auto). This way you actually get warm air blowing on your face, hands and arms. Somehow, my 2013 does not blow warm air out those vents on auto in EV mode, it sends it all into defroster and the floor vents, which mostly just produces a cold draft in the car, especially for relatively short trips and Eco.

My experience confirms this; to get actual warm air, you've got to stop anything blowing on the windshield; even selecting "face+windscreen" w/ "defrost" console button un-pushed, when I'm in "hold" (gasoline) mode or out of battery and on gas, even when I've been getting toasty warm engine heat blown on my hands, results in the heat going cold or at best lukewarm. And it's reversible; switch back to "face" and stream of air gets toasty-warm again. Something in the logic (maybe related to humidity sensor and some designer's fear of windshield fogging???) just won't let me blow warm air on the windshield.

css28
10-30-2013, 09:44 PM
Arguably, that's why they offer manual selection. Absent any override it's logical for the system to assume that you want warm air to your feet and a little towards the windshield. Since the fix my car blows warm air at the windshield on command. It is not a design flaw. Your system is not working correctly.

The topic of this thread though was my inability to get electrically heated air out of any duct when my climate control was malfunctioning.

css28
10-31-2013, 07:44 AM
I'm going to contact the dealership and close the ticket.

This problem is fixed.

Good luck everybody!

koric1
10-31-2013, 09:29 AM
Wonderful... so after all the back and forth the heat problem can be fixed via

Perf OBDII system scan code B101D. Diag and rep coolant Heater control module top off coolant test drive good perf?

css28
10-31-2013, 09:42 AM
In my e-mail to my service advisor I asked if he could provide the final work order and details.

We'll see.

PhilKatz
10-31-2013, 06:41 PM
Ques was
Another thing, how do you turn off the recir air? I have to drive with a window slightly cracked to stop the windows from constantly fogging up. And this is with a garaged car. This has to get fixed. We can't use this car like this in the winter.

1. On console screen un-select _both_ of the recirc icons (the regular and the "auto" ones).

2. If this gives you a fogging-up prob, just push the _left_ windshield button on console. In 2-3 sec you get a blast of
mostly-cool, but high velocity air on the windshield that clears it up just likety-split (10 sec). Then turn it off again,
so you dont have to be blasted in the face any longer.

But you better punch that defog button as a reflexive action, no matter what, at first sign of fogging-up. Otherwise the fogging-up could shortly progress quite rapidly and you'd have to pull over or slow down to wait for even the likety-split defogger to take effect.

My guess is that the quickness of the windshield fogging up, once it gets started (maybe 'cuz of the big angled windshield??), is the reason for GM's obsession w/ the humidity sensor, and blowing cool air when humidity increases. Possibly, their legal dept sez not to trust us drivers with being quick to hit the defog button when we see initial fogging.

css28
10-31-2013, 06:49 PM
I predict your fogging problem will most disappear once your heater gets fixed.

ampBEARa
11-02-2013, 08:53 AM
Strange this happens to all of us at the same time! Same problem here in freezing Norway with my 2013 Opel Ampera (delivered autumn 2012, unsure of build-date, but it's from Detroit, like all your Volts). Drove my parents 60 km (apx 37 miles) home from a party in Oslo. Humidity fogged up the windows, but I wanted to drive fully electric, so I ran the fan on low and climate on "min", only pressing the demist-button for a couple of seconds when the windows became occluded.

After 15 minutes of driving, the car was rather cold, so I decided to run the heater on eco and auto. The fan sped up to max, pulling in cold air (3C / 37F). Usually, it runs at a low speed until the heater element is hot, but not now. Full blast. I figured it had to be due to the humidity, so I just let it run for a while, but it never ceased, and after 10 minutes of driving, the air was still ice cold. Turned down the fan manually and stopped the car in Lillestrøm. Power usage: 0.5 kW, climate eco display: 100%. Heater element: OFF. AC: OFF. Powered down the car and started it again. Pressed climate "auto" button. Fan blasts cold air again. Got pissed, switched to "sport" and ran the battery down instead of saving power. Engine comes on and runs for 5 minutes. Still no hot air! Then, all of a sudden, there is a slight "thud" from behind the dashboard, and the air is glowing hot. Five minutes of hot bliss before pulling off the highway. My early regen braking before taking off the highway at this point usually gives me enough power to drive through the city the rest of the distance purely electic, so after two minutes of EV city driving, the air was back to cold again.

I read one comment here saying it had only happened with many people in the car. Maybe there is a programming bug in the anti-humidity routine?

Also, the day before this happened, I noticed the low-pitched humming noise that comes on when activating the climate system made an annoying vibration noise. With AC and heat off, running the fan at the lowest setting, there is this inexplicable humming from the front of the car. Turning the fan off stops the sound. What is this noise?

The Ampera has no OnStar functionality. I have to take it to the dealer to do anything, so I hope there are someone who can figure out what is wrong so I can tell my dealer what to do. They seem less informed than the average american Volt dealer.

Next time I'll be driving, I'll just put on warmer clothes and keep the climate on ECO/auto.

Tl;dr: "Norwegian" version of the Volt 2013 has same heating issues. Related to humidity control?