Air Conditioning takes a while to cool down?

[eldoj]

On our 04 Envoy, it takes a little while for the AC to get cold on the warmer days. If I start the truck, it will not get cold until we start moving and drive a little while. Is this normal for this vehicle? Is it just because it is so warm outside? My other vehicles don't have this problem, I can start them up and they start getting cold right away.
Will the recharge kits that they sell at the local parts store help?

Thanks

 

[Molson02536]

On our 04 Envoy, it takes a little while for the AC to get cold on the warmer days. If I start the truck, it will not get cold until we start moving and drive a little while. Is this normal for this vehicle? Is it just because it is so warm outside? My other vehicles don't have this problem, I can start them up and they start getting cold right away.
Will the recharge kits that they sell at the local parts store help?

Thanks

You are most likely just a little low on R134a. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.

Below are normal car AC pressure readings with 134A.

Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI

Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI –

Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

Take it to a A/C certified shop and they can get your A/C running 100% again soon. With your low side pressure being around 25-35 PSI and the high side pressure around at 200-350 PSI depending on the out side temperature will get your 110% A/C performance to your Envoy.

Keep us posted and good luck.