Howdy Guys,

So I have an issue with my AC when I turn my truck on when its really humid outside... The A/C will not run and will only blow. I've had the dealer look at it, but they were never able to get it to act up. I took it there so many times that they finally replaced the evap sensor and recharged they system, which was working for a few weeks until today. For the first 15 min of my drive I had no A/C, then it magically turns on, which is the case whenever I have this issue. The A/C will eventually turn on at some point, sometimes it takes 15 or 30 minutes, then it will work completely fine.

Do y'all have any thoughts on what the issue could be?

 

How is your battery? Maybe it is low and the system is cutting it until recharged. Just guessing

 

That is a great thought. I believe it was good about 2 months ago, Its still the original battery in my 17.

 

I recently had to change my 16. They don't last as long as they used to

 

sounds like it could be a cut or chafed wiring issue for the pressure sensor or the compressor.

 

I forgot to add that the clutch does spin even when its not blowing cold air.

 

Any idea if the pressure sensor is easy to replace? Might be a cheap fix to try.

 

most are not too terrible to replace, however you will have to recover and recharge the system to do so.

The clutch not engaging/cycling is why the air does not get cold since the compressor is not pumping the freon. The question would be why. The compressor has a connector on it and the pressure sensor both can cause this issue. I would inspect both connections for damage 1st and then check the wiring to each before just replacing the sensor. Most of the time you can bypass the sensor to eliminate it.

 

The clutch is engaged and spinning when its not blowing cold, which is weird. Im thinking of replacing the fuse relay.

 

sorry I must have read one of the comments above incorrectly.

if the compressor is engaged and the system is not short cycling then it would seem though that the system is not low on freon. if the system is blowing warm though it could be either a restriction in the ac system or something inside the cab like an actuator or blend door not opening.

hard to really know, just a process of elimination