2003 Yukon AC not blowing cold

[Wahoo2]

Our 2003 Yukon with rear air isn't blowing cold air. I wouldn't say it's warm, just not cold. I set the AC on 6o degrees and put the blowers on high. I connected a gauge set. Can someone help interpret the readings?
72F degree Day
Low gauge cycled from 25-55
High gauge cycled from 78-125

 

[Randy Whistler]

Our 2003 Yukon with rear air isn't blowing cold air. I wouldn't say it's warm, just not cold. I set the AC on 6o degrees and put the blowers on high. I connected a gauge set. Can someone help interpret the readings?
72F degree Day
Low gauge cycled from 25-55
High gauge cycled from 78-125

Does your compressor cycle on/off frequently when trying to cool? Generally speaking, if the compressor cycles on/off frequently during cooling, you're low on refrigerant in the system, which implies a leak somewhere.

Does the compressor run normally when cooling but does not cool properly(as reported)? Still could be low on refrigerant . .

I can't help with the PSI readings but am sure someone can. I would suspect you're low on refrigerant but without actually putting eyes on it, it's just a Scientific Wild-Ass Guess(SWAG) on my part!

 

[Wahoo2]

Does your compressor cycle on/off frequently when trying to cool? Generally speaking, if the compressor cycles on/off frequently during cooling, you're low on refrigerant in the system, which implies a leak somewhere.

Does the compressor run normally when cooling but does not cool properly(as reported)? Still could be low on refrigerant . .

I can't help with the PSI readings but am sure someone can. I would suspect you're low on refrigerant but without actually putting eyes on it, it's just a Scientific Wild-Ass Guess(SWAG) on my part!

Thanks for the response. The compressor does cycle on/off, but I wouldn't say it's excessive. I think I am going to try and add a little refrigerant and see if anything changes. We have had the vehicle 2 years so it's hard to say what maintenance has been done to it. It's just stopped blowing cold, no noises or anything.

 

[Randy Whistler]

Well, I think that if you invest in a charging gauge set at WallyWorld or wherever, it'll be money well spent, if for only the ability to see what your pressures are in your system. Be careful not to overcharge, though!

 

[Wahoo2]

Well, I think that if you invest in a charging gauge set at WallyWorld or wherever, it'll be money well spent, if for only the ability to see what your pressures are in your system. Be careful not to overcharge, though!

Thanks for your response. I actually got a set of gauges, that's how I posted the pressures in the original post. I m just going to add little refrigerant.

 

[Danny3737]

Check your fan clutch

 

[Scottydoggs]

give this a shot, good old actuator reset.

 

[Wahoo2]

Check your fan clutch

Didn't think about that, Thanks

 

[Wahoo2]

give this a shot, good old actuator reset.

Thanks for posting the Video!

 

[Justinj360]

Can the rear HVAC be reset like in the video or does it reset the whole system when you use that method?