Looking for help with Blend Door locations and/or repair.

[mmagic]

Hello. 2005 XLR purchased in 2008. 50,000 miles. Always in a garage and tender. The A/C on the driver's side is 20 degrees warmer than the passenger side. Heat seems fine, just the A/C
puts out around 75 degrees on driver's side but 55 degrees on the passenger side

 

[Fireduck69]

Maybe passenger side sensor? Just a guess but try everything else before considering replacing the heater box. I think they started the assembly line with the heater box and built the car around it.

 

[mmagic]

Thanks. The passenger side air and heat is fine. The driver's side heat is fine but air is too hot. I wonder where the sensor's are located. I am looking at getting a service manual and wrestling with a hard copy or a much cheaper USB version. Any idea where I can find these sensor locations online?

 

[Fireduck69]

Drivers side sensor is just below the start button.
System uses a foil roll with holes in it that wined back and forth till the proper patch with the holes for the selected function are aligned.

 

[mmagic]

Okay will check that out. A thermistor that "opens" will show high resistance which relates to lower indicated temperature (than actual). Perhaps that is keeping the blend door partially open, passing heat.

 

[justdennis]

The problem might be that you are low on refrigerant, Scotty Kilmer did a youtube about that same problem.
Good luck

 

[mmagic]

The problem might be that you are low on refrigerant, Scotty Kilmer did a youtube about that same problem.
Good luck

Thank you! I added 120 grams more refrigerant and now only 1.6 degrees different. 54F on passenger and 55.6
on driver's!

 

[justdennis]

Glad to hear that worked for you, we need all the AC we can get here in Florida.