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Is it better to pay for expensive heater repair or buy a cheap power invertor kit w/spaceheater

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2014 Heater Assembly Replacement Nightmare

3138 Views 30 Replies 15 Participants Last post by  gman1
The Volt uses a heater system that is complex and expensive to replace. It uses a heating system which relies on an electric heater to heat up coolant that is going through the coolant line. The heated coolant is then sent to a pump which then provides heat to the cabin. Without an in-line coolant heater, the system does not work and requires the replacement of the in-line coolant heater (also known as GM part no: 22851153, 22747764, 22788440, 22792167, 22794426)

I have been trying to fix this problem by first going to a local GM dealer, only to find them asking 3800 dollars for replacement of the inline coolant heater and heater pump and the 8 hours of labor it takes to get access to the parts and replace them. Just the in-line coolant heater alone would cost 1700 dollars. I did find a new one on GM part exchange for 1000 dollars. I don't have that much available to spend on repairs so I then found a local mechanic that would be able to use parts I found on used car parts online search service.

That lead me to Green Light Auto in Southern California, where they had the part listed including the correct part number. Only problem is they ripped the part off and the High Voltage wire and connector were missing when I received the part in the mail. The wires cannot be spliced according to a certified GM Volt tech because that could heat up and start an engine bay fire.

So back I went to look for another replacement part, and there are not many used in-line coolant heaters available anymore (even though they are interchangeable through all Gen 1 years). The next place I called still hasn't returned my call, my price quote, or any of my emails. All I wanted to know was if the part they list on their website and on is actually the GM part number I listed earlier.

So now I'm stuck buying the $1,000 plus tax in-line coolant heater new (can't afford) or just buying the power inverter kit that is on this forum and plugging a space heater into it which all together would cost $500. Which is the best way to go in this situation, and has anyone else dealt with this? Been a Volt owner for over 2 years and it's a 2014 Volt with 111k miles.
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Local GM dealer did the Diagnostic and it was 300 dollars. They had a Volt tech try everything including testing for any power draw, there is none. It says at 0 kw on the dash with full heat on both electric and gas engine. The dealer's mentioned the increased cost on the diagnostic was because it was a certified GM Volt tech and their labor hours were higher then the diagnostic they would charge for my other car that is an Equinox. The code that they pulled is B101D Electronic Control Unit Hardware Failure. Hope that helps, they even called to the next major big city, St. Louis GM Volt tech to verify that there wasn't any other repair that could work. I've been without heat in my car for over a month!

Thanks for your help, everyone!
Message me if you would like instructions how to locate the hole you'll have to go through three layers the top floppy protection the metal compartment wear the battery sits and then through the very bottom mud flap under the car
That's a very interesting idea! I will message you about the details and instructions. If it's something me or my mechanic can do and it's safe and affordable then I'm all for it!
I bought this part new GM 13597899 Pump, Heater Coolant : Automotive
GM 13597899
I can have my mechanic install that, and in theory I should have heat on the engine side even if can't find a used in line coolant heater replacement. My non-working in-line coolant heater will still be on the car but when I use the engine it will heat the coolant and the new pump should then move that heated coolant towards the blower and then I would have cabin heat! The shop is closed today but I'm going over this plan on Monday.

Thanks for the suggestions, everyone! It's been cold here in southern Illinois, so I need to figure this out quickly! I'll let you all know how it all pans out.
That does not sound like a heater to me. Sounds like an ECU.
You are right, all I know is that I request the codes from the diagnostic, and they gave me a print up with this listed on it. For all I know they may have a different code, but according to the invoice they said the pump and in-line coolant heater needed to be replaced. It doesn't draw any power on either gas or electric when I try to use the heater, so that may be the same conclusion the dealer came to and just decided to quote me a full replacement. My own trustworthy mechanic also confirmed agreed with what the dealer listed in the invoice. There may be some other component that is the cause of the heater failure, but I haven't heard anything regarding that so far. The fact that they list this repair as 8 hours leads me to believe its a design problem with the Volts, a heater replacement shouldn't take that long and cost this much!
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Thank you for posting the TSB on this, I wish it was under warranty but it's long past that. Also I see the recommended part number is the one I have been using to try to locate a used Coolant Heater Module Part Number 2285113. This supersedes the older part numbers I listed in the original post. I just can't locate one that is affordable, new the cheapest is $1,000.

Thank you again for sharing this information, it's some great confirmation of this problem with heaters on the Volts.
Looks like Gen 2 Volts ended up having the same problem but with a different coolant heater. This seems to be the same issue but with the Gen 2 Volts version of the in-line coolant heater.

Looking like GM is letting this problem happen to owners of both Gens of Volts.
Why did you allow GM to let this problem happen to you?
Yes, that is sarcasm.
GM agreed to warant they'd be responsible to correct defects in material and workmanship of specific items for a specific period (time and/or distance) provided specific conditions were met. Are you still covered by the waranty? No? Then it's not their responsibility now. It's yours.
Fix it to re-gain full functionality, or develop a work-around to re-gain some functionality, or do nothing.
My flame-resistant suit is on.

How handy are you?
Thanks for your insightful comment. If you looked at my link it mentions how this isn't covered by warranty for newer Volt owners and is by my understanding a design problem. If you don't like my opinion, then why take the time to comment at all? Your link to a ebay listing for a solar water pump makes no sense, and you are not helping this discussion with your "sarcasm." If you have any info to share that is useful other than stating the obvious, that it's my problem then please share.

Other forum members have been nice to give me info that includes work arounds, TSB's and part numbers. If you have nothing else to add to the discussion, then move on.
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