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Automotive AC Tech's- I need help!!

1981K20

Up North
Joined
May 19, 2020
Member Number
369
Messages
193
Location
North of MT but south of AK
Sick of dealing with 'technicians' that have zero clue about troubleshooting AC and was hoping the vast knowledge of IBB techs might help out lol

Spent more than I'd like to admit on my AC in a 2001 ram diesel.. new compressor, evaporator, truck radiator and AC recharge within the last 2 years. AC is great when moving and shortly after start up but slowly fades unless moving at highway speeds. At a stop I have about 3-5 mins before the AC fades rapidly and the truck temp increases, but won't (or hasn't yet) overheat.

Any ideas????
 

Wolfe_Man

Don't Label Me!
Joined
May 19, 2020
Member Number
242
Messages
183
Location
Apple Valley CA.
Sounds like an airflow issue. I agree with above, check your fan clutch. It can be enough flow to keep engine cool but not enough airflow over condenser to have AC work properly.
 

ThePanzerFuhrer

The Rock Breaker God
Joined
May 19, 2020
Member Number
84
Messages
1,491
Location
Wi
Did you lose any of the shrouding around the fan or between the condenser and radiator?
 

BIG-O

Well-known member
Joined
May 20, 2020
Member Number
809
Messages
96
Did you flush the condenser real good after the compressor change? Did the compressor scatter? Black death? Pull a good vacuum? Air/moisture in the system will drop it's efficiency drastically.
 

1981K20

Up North
Joined
May 19, 2020
Member Number
369
Messages
193
Location
North of MT but south of AK
Did you flush the condenser real good after the compressor change? Did the compressor scatter? Black death? Pull a good vacuum? Air/moisture in the system will drop it's efficiency drastically.

I had a long standing local shop do the replacement but I should've mentioned that the condenser was changed when the compressor was replaced as said shop had highly recommended to replace it. This truck tows my shit south twice a year and I do not cheap out on it.

I'm going to replace the clutch fan this weekend with an OEM one. Thanks to the replies I googled some troubleshooting and it appears fucked. Not sure why AC tech near my work didn't catch on to that but I'm glad I declined his offer to 'dig deeper into the issue'

Thanks again for the replies 🍺
 
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