pre 85.5 AC question
07-07-2011, 02:43 PM
#1
Track Day
Thread Starter
Join Date: May 2011
Location: Huntsville AL
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
pre 85.5 AC question
I recently replaced the compressor and drier. I recharged the unit with about 2 1/2 cans of freeze 12. The clutch would not engage on the compressor. I jumped the compressor and the clutch does engage. Need help troubleshooting what is keeping the AC from coming on. When I had the AC jumped, the car still did not blow cold. When I turn the AC **** the fan does not blow. HELP!!!!!!!!!!!!!!!!!!!
07-07-2011, 06:31 PM
#3
Rennlist Member
When you press the A/C switch, does the compressor clutch engage? If not, it could be the low volume cut off switch is bad. You probably removed the terminals from this switch in order to jump them to get the compressor running for the refill. Does your blower motor come on at all? Try turning the fan **** to position 4. If the fan only comes on in pos 4, could be a bad resistor block.
07-08-2011, 01:27 PM
#5
Instructor
Join Date: Feb 2011
Location: Mobile, AL
Posts: 156
Likes: 0
Received 0 Likes
on
0 Posts
I've recently been through this. Your options: bad a/c amplifier (this is what controls the temperature), bad evaporator temp sensor (if the resistance of the thermistor is too high it will keep it from engaging. This was my problem), and a bad A/C relay.