A/C not cooling. Low freeon?

[Kaiser81]

I have a 19 Bighorn. When I start my truck. Not on necnecessarily hot days in iowa. I can sit at idle and the ac will NOT get cold. Even when parked for 10 minutes. Once I start driving it will start to get cold. Other times it will be perfectly fine. Any thoughts? Low freeon? I bought a couple canisters but wanted to get everyone's thoughts. thanks

 

[HSKR R/T]

I have a 19 Bighorn. When I start my truck. Not on necnecessarily hot days in iowa. I can sit at idle and the ac will NOT get cold. Even when parked for 10 minutes. Once I start driving it will start to get cold. Other times it will be perfectly fine. Any thoughts? Low freeon? I bought a couple canisters but wanted to get everyone's thoughts. thanks

There have been reports of some 19s and 20s that shipped from factory low on refrigerant

 

[Richard320]

Get yourself a rag and a pair of vise grips. Wrap the heater hose coming from up by the thermostat with the rag then pinch it off with the vise grips. This will block the flow without damaging the hose. See if AC improves. If so, there's a problem with the blend door. If not, good chance you're low on refrigerant.

 

[theblet]

When did this start? Have you had the AC redesign TSB done? Try the AC hack first to see if that helps.

Air conditioning Hack

Today I was able to get 36-38 degrees blowing out of both the drivers side and the passenger side ac vents. Previously I was getting 44 out of the passenger side and 50-52 out of the driver side. I installed a water shut off valve in the heater hose going from water pump to the heater core. It's...

5thgenrams.com

 

[wallyuwl]

Yup, try the AC hack first. If it works then your AC itself is fine. It is a problem with having the old blend door system and you will need the TSB done for that.

 

[yellowboy]

these trucks are built for cold and dry climates only, the probem is it didn't say that in the brochure I got when I was shopping for one.