I am trying to determine which part I need to replace to get my front heater to properly work (climate control). I suspect I need a new AC Heater Control Module, but since I need to order one over the internet and they are non-returnable, I am hoping to confirm this is the best part to replace to solve my problem. Here are the symptoms and what I have tried to date:
The heater blower no longer functions although you can feel heat coming out of the proper vents when the heater is on (same for passenger and driver side). I cannot manually turn up the fan blower either; it is non-responsive.
Yet my climate control functions perfectly when in Air Conditioning mode (set the temp below air temp and the blower and AC come on and function perfectly on both driver and passenger sides). This tells me there isn't a temp sensor issue, or blower issue.
So I removed the AC Heater module, and found part number 10367041 marked on the part. All looked ok, so reinstalled. I was then surprised to find that the module worked properly after reinstallation (blower and heat worked as they should). Next morning the heat blower was again nonresponsive despite the 34 degree morning temps.
I read to remove the fuses to reset and recalibrate. Tried this and again the module worked properly until the next morning startup.
I removed the module from the dash once again, and this time disassembled it to look for loose wires or obviously blown parts. Saw indications of overheating where the wires connect the circuit board to the wiring harness connector (browned wires), but all wires were landed properly and not melted, nor were any parts obviously blown. I reassembled the control module and reinstalled. Again, it worked fine until the next morning startup!
Then tried disconnecting the battery cables and touched them together for 30 seconds per dealer instructions to discharge any capacitors, and then reconnected. Again the climate control worked perfectly until the next morning.
So it seems that maybe some component is getting too hot and trips some control module to where the blower won't function until it is reset.
Do you think I am correct to order a new AC Heater Control Module or should I be trying something else first?
Dealer said to pay them $115 to diagnose, but there is less than 80% chance they will be able to determine the problem from this test, and likely will throw parts at the problem. I would rather save the money and throw parts at it myself with those odds, especially since I can find the part online for half the dealer cost, before also paying for diagnostics and labor.
Is there anything I'm missing, or another component I should be looking at? Thanks!!!
Marc
The heater blower no longer functions although you can feel heat coming out of the proper vents when the heater is on (same for passenger and driver side). I cannot manually turn up the fan blower either; it is non-responsive.
Yet my climate control functions perfectly when in Air Conditioning mode (set the temp below air temp and the blower and AC come on and function perfectly on both driver and passenger sides). This tells me there isn't a temp sensor issue, or blower issue.
So I removed the AC Heater module, and found part number 10367041 marked on the part. All looked ok, so reinstalled. I was then surprised to find that the module worked properly after reinstallation (blower and heat worked as they should). Next morning the heat blower was again nonresponsive despite the 34 degree morning temps.
I read to remove the fuses to reset and recalibrate. Tried this and again the module worked properly until the next morning startup.
I removed the module from the dash once again, and this time disassembled it to look for loose wires or obviously blown parts. Saw indications of overheating where the wires connect the circuit board to the wiring harness connector (browned wires), but all wires were landed properly and not melted, nor were any parts obviously blown. I reassembled the control module and reinstalled. Again, it worked fine until the next morning startup!
Then tried disconnecting the battery cables and touched them together for 30 seconds per dealer instructions to discharge any capacitors, and then reconnected. Again the climate control worked perfectly until the next morning.
So it seems that maybe some component is getting too hot and trips some control module to where the blower won't function until it is reset.
Do you think I am correct to order a new AC Heater Control Module or should I be trying something else first?
Dealer said to pay them $115 to diagnose, but there is less than 80% chance they will be able to determine the problem from this test, and likely will throw parts at the problem. I would rather save the money and throw parts at it myself with those odds, especially since I can find the part online for half the dealer cost, before also paying for diagnostics and labor.
Is there anything I'm missing, or another component I should be looking at? Thanks!!!
Marc
