YACACT (Yet another car air conditioner question)

[CPA]

Anyway to adjust my A/C so that cold air continues to come out even when the car is at a stop? The A/C in my van will lose a lot of it's "coldness" when it is idling (stopped at a light, waiting forever for the food from Sonic, etc.). What can be done to fix this?

 

[psteng19]

At low RPM's (idling, stopping), the engine will not be turning the compressor as quickly, so the air won't be as cold.

Maybe a set of larger pulleys (if such exists)?

What car, how old, how many miles?
A tune-up or a/c service may help (freon).

 

[CPA]

98 GMC Savana Custom van w/77000 miles on it. Had the freon checked late last year.

 

[Ronstang]

Originally posted by: psteng19
At low RPM's (idling, stopping), the engine will not be turning the compressor as quickly, so the air won't be as cold.

Maybe a set of larger pulleys (if such exists)?

What car, how old, how many miles?
You may need a tune-up or something (add freon)?

Sorry, compressor RPM is not the problem rather it sounds like you need to top off the charge of freon. If that isn't the problem then you have an airflow problem across the condenser that could be as simple as cleaning it.

 

[psteng19]

Well, I never stated the drop in RPM's was the problem.
Just explaining why it's less cool at a stop 😛

Since he already stated he had the freon checked last year, there may be a leak somewhere.

 

[Quixfire]

Originally posted by: Ronstang

Originally posted by: psteng19
At low RPM's (idling, stopping), the engine will not be turning the compressor as quickly, so the air won't be as cold.

Maybe a set of larger pulleys (if such exists)?

What car, how old, how many miles?
You may need a tune-up or something (add freon)?

Sorry, compressor RPM is not the problem rather it sounds like you need to top off the charge of freon. If that isn't the problem then you have an airflow problem across the condenser that could be as simple as cleaning it.

Sounds like you fan clutch is bad and not drawing enough fan across the condenser when you aren't moving. Take a hose and run water over the condenser and see if you vent temp drops, if i does then it the fan clutch, if not it may be low on freon.

 

[CPA]

Originally posted by: Quixfire

Originally posted by: Ronstang

Originally posted by: psteng19
At low RPM's (idling, stopping), the engine will not be turning the compressor as quickly, so the air won't be as cold.

Maybe a set of larger pulleys (if such exists)?

What car, how old, how many miles?
You may need a tune-up or something (add freon)?

Sorry, compressor RPM is not the problem rather it sounds like you need to top off the charge of freon. If that isn't the problem then you have an airflow problem across the condenser that could be as simple as cleaning it.

Sounds like you fan clutch is bad and not drawing enough fan across the condenser when you aren't moving. Take a hose and run water over the condenser and see if you vent temp drops, if i does then it the fan clutch, if not it may be low on freon.

How can I tell if the vent temp drops. Sorry, I am a car neofyte.

 

[Quixfire]

Originally posted by: CPA

Originally posted by: Quixfire

Originally posted by: Ronstang

Originally posted by: psteng19
At low RPM's (idling, stopping), the engine will not be turning the compressor as quickly, so the air won't be as cold.

Maybe a set of larger pulleys (if such exists)?

What car, how old, how many miles?
You may need a tune-up or something (add freon)?

Sorry, compressor RPM is not the problem rather it sounds like you need to top off the charge of freon. If that isn't the problem then you have an airflow problem across the condenser that could be as simple as cleaning it.

Sounds like you fan clutch is bad and not drawing enough fan across the condenser when you aren't moving. Take a hose and run water over the condenser and see if you vent temp drops, if i does then it the fan clutch, if not it may be low on freon.

How can I tell if the vent temp drops. Sorry, I am a car neofyte.

Temperature gauge, you can get one a parts store for about ten bucks.