Climate control unit not responding intermittently

Tiny
CARGUY1934
  • MEMBER
  • 1995 CHRYSLER NEW YORKER
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 85,430 MILES
Climate control intermittent. Sometimes it operates and other times it blows hot air. Replaced entire control unit. Still same problem. Could it be body controller?
When it works all is okay. Intermittent. No codes show with key sequence code read.
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Sunday, April 26th, 2020 AT 1:06 AM

5 Replies

Tiny
KASEKENNY1
  • EXPERT
Short answer is yes it could be the BCM but most likely only if you have auto temperature control. Do you have a manual or auto system?

I attached the wiring diagram for the auto temperature control system. Basically the BCM controls most all operation of the system on auto systems. If it is a manual then the HVAC module controls these functions.

Let me know which system you have and we can go from there. Thanks
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Sunday, April 26th, 2020 AT 5:46 PM
Tiny
CARGUY1934
  • MEMBER
Well, I suspected that it was the body control computer but could it be the in car temperature sensor above the glove box Aspirator motor. Is there an actual motor there. I.E. Blower that is clogged with dust? I will use a duster and blow some air. Or a vacuum to see if there is an improvement/fix.

I have the factory service manual but I could not associate the dash Heater/ac control with the body control computer. I found it and looked it over, it doesn t Look very difficult to remove and install.

I will check the Chrysler Dealership and see if they have one in stock. Usually they will want the old one in exchange. They will give me a discount.

I thank you for taking the time to answer and the diagram you sent shows the temperature se.
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Wednesday, April 29th, 2020 AT 9:52 AM
Tiny
CARGUY1934
  • MEMBER
Greetings guys, about the question concerning the climate control on my car that indicates the BCM is bad. I checked eBay and rockauto. There are no BCM's available. So it looks like there is no fix.
A few years ago the problem first started. The climate controller would not respond to any inputs. Nothing, no function buttons, auto, off, button. Would not do any thing. I purchased he control box, new in box, eBay. Replaced it and every thing functioned properly. Very pleased. But 5 or 6 months later it started doing the same thing. I could start the car and sometimes it would work. Next time back to no response. Heat was coming out of the dash vents. This morning I started the car and A/C came on dash vents blowing cold air. Very exasperated at this condition. I am going out there right now and see if it will work. Push the 3 button diag thing and see if it indicates a code. The code thing would not indicate when it was not working properly.
Ben
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Wednesday, April 29th, 2020 AT 4:24 PM
Tiny
CARGUY1934
  • MEMBER
Greetings Kasekenny.

Well I went out to my car I turned in the ignition and the unit was working, so I did set the the temperature to 70. I pressed the 3 buttons and the temperature readout started to blink and I released the buttons and the temperature readout started to blink for about 3 seconds and it read out a code.

36. Panel communication failure. The control panel, A/C and heat are operating normally..
I have replaced the control box with a new one purchased at eBay. Installed it and it operated properly for 2 months.
Can it be that a wire in the connector to the box is intermittent?Or a wire someplace is broken?
Is there any I can check out the wires? Which wire in the connector could be the one to check? I have a good electronics background.
Atc. In vehicle temperature sensor Code 36 panel communication failure suggests a loose wire ! Something is not talking to something. We request that we start a new post for questions that are not directly related to the topic. The only reason is others will not find the answer to this question under a different subject. Basically this site is here to assist those that need direct help but also provide a resource for others that have the same issue.
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Thursday, April 30th, 2020 AT 1:26 PM
Tiny
KASEKENNY1
  • EXPERT
I attached the wiring diagram for the ATC. If this is a loose wire then you may be able to get it to act up by wiggling the harness. Just be very gentle with it. You don't need to pull it like trying to start a chainsaw. Try to mimic the movement it may have while driving down the road. Small gently wiggling and see if you can get the issue to happen.
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Friday, May 1st, 2020 AT 6:09 PM

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