2013 chevy volt coolant12/10/2023 I personally had this taken to a dealership where they told me the issue was my electric heater and wanted $1700 to replace it. I hope this saves the next person a lot of time and money. thus no cabin heat during ice or electric mode. Mine was complete blocked and preventing hot coolant flow to the heater core. This is actually an inline filter of some kind and it should be clean and unblocked. Pull this hose out and then once its out pull off the so called "Adapter" in the middle of the hose (part number 20997934). The hose is connected to the driver side of the "shut-off valve" via a hose clamp and runs over to the fire wall where it is mated with the heater core outlet hose (Top one) via a quick connect type fitting. But before doing so make sure to disconnect the 12 volt battery then disarm the high voltage electric system. If its not running, this is likely your problem combined with a faulty "shut-off Valve" (part # 22987494) that is stuck in the electric mode position.Ĥ.) Now you need to pull this hose out of the car. It should be running and vibrated quite a bit, if so move on to step 4. ![]() Watch a youtube video on where it is located and how to get to it. Now you may need to remove the front right tire or lift the car at the very least but you must be able to get your hand on the auxiliary electric coolant pump to see if it is running. It should be noted that this is also a symptom of a faulty auxiliary electric coolant pump (part # 13597899) Next step is to determine if that is faulty or not.ģ.) While your car is on and in electric mode, turn heat one full blast once more. What's happening is your electric coolant heater is turning on to heat up the coolant but doesn't detect flow through it so it shuts down. If cold, continue onto step 2.Ģ.) If you turn your car on in electric mode (make sure engine is cold) and run the heat on full blast while you have your power draw displayed on your dash, you will see a spike in power of about 4-7KW for a couple seconds before it tappers off to. your issue may be a blend door and you can stop here. so be careful ) If they are hot but you don't have heat. ![]() Check to see if they are cold or hot as fuck. ![]() It should expose access to your "Heater Core" and the inlet and outlet pipes going to it. Start all the way back by the accelerator pedal and gently pull it away. Mine was completely clogged and full of nastiness.ġ.) Obviously check for heat in both electric mode and gas mode, if none continueĢ.) While your checking for heat in both electric and gas mode, pull the inner body panel by the drivers right foot. Its not, its a inline filter and its in the coolant line that is the outlet to the cabin heater core (which is also incorrectly labeled as the inlet in the service manual). The problem was this part (part number 20997934)īoth the service manual, GM parts direct, and the dealership will tell you its called an adapter. Below is an explanation of my cars symptoms and a way I think one could diagnose this issue for anyone who may come after me. Okay so I have posted here a few times about my issue with the lack of cabin heat in my gen-1 2013 volt in both electric and ice mode, and after replacing pretty much all the usual suspect parts ($800).
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