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AC blowing warm


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Loved your videos for years.  I am proud one-owner owner of 280k miles 2013 Chev Malibu LTZ 2.5l 4 cyl. I love my car!

Well AC started blowing warm. From some of your videos I've been able to see the low pressure port valve is leaking (see bubble, hear hiss) probably the expansion valve is broken because it blows warm, compressor never stops, coolant level was almost full. Pressure high in low port so didn't add R134. 

I asked my mechanic to check gages and then empty r134 so I could fix things then bring it back. Well, he only checked ports without it running. So low and high were both about 100psi but he never turned the AC on! Ugh. And he already emptied R134. 

He said he saw that compressor was leaking. 

At this mileage should I just replace low port valve & expansion valve and refill and add stop leak or see then if compressor really leaks and needs repaired?  Is there a way to to look at compressor for leaks if r134 is already taken out of the system?

I am unemployed, getting ready for big shoulder surgery and gotta decide on an inexpensive but fairly potentially successful repair route asap before I physically can't so a repair because I cannot afford a shop to do the repairs. I'm in Florida. It's 10am and 95 degrees F! 

If I replace the darn compressor I know I will have to replace the Condensor or void any warranty later. Ugh. Maybe a you pull-it for parts? Again, depends on any ability to check Condensor for leaks without system charged...

1 Answer

Don't add "stop leak" unless you really want to risk plugging up virtually every component in your AC system, effectively destroying it. If you intend to work on your air conditioner a manifold gauge set is a must, you need to see pressures while the system is running to do any kind of meaningful diagnosis. An inexpensive one is fine for home use. You could also elect to buy a kit that also has a vacuum pump, can tap, and accessories.