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Old 04-16-2022, 04:39 PM
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haigha haigha is offline
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Quote:
Originally Posted by 253movingto928 View Post
...

1. When I start the car, I have the AC turned on but ‘generally’ the interior AC/Heater fan has not been coming on, this is sporadic as it does turn on from time to time but most of the time, it does not matter how I try to manipulate the fan speed or temperature settings.

a. Could this be an indication of the ‘final stage resistor’ needing replaced.
The AC/Heater fan never runs with the key off though.
...

e. Any other thoughts/ideas of things for me to check?
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a. I have an 04 n62 4.4. I'm pretty sure both times my FSR went out, there was no activity from the fan. It has been over a decade since I replaced the second one.

Once you get the fan running, which could be as simple as cleaning out the small vents on the AC control panel with air, as you mentioned.

e. Have you checked the refrigerant in the AC system? I'm now annually charging up my system with AC Pro. First I got the kit with the hose and now use the high-mileage variant:

https://www.walmart.com/ip/A-C-Pro-A...0-OZ/353326131

https://www.walmart.com/ip/Ac-Pro-A-...nces/444741999

I use an infrared temperature gauge at the center vents with them set to the blue dots, both temperatures set to 60 and fan on max. I do it in stages, short bursts of refrigerant, until the temperature out of the vents is in the low 40's.
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