AC Evaporator ever go bad?

[celeryman22]

Hi guys, does teh evaporator on our AC systems ever go bad? I have mine out and I dont see any damage. Can I put some pressure to it and check for leaks? And if so what amount of pressure.

Thanks
Mike

 

[72VETTE454]

Mike,
Unless I'm mistaken, the only way for an evaporator to go bad is if it develops a leak like you mentioned. And this does happen from time to time. You can pressurize it to check for leaks. I believe the evaporator will normally see in excess of 100 PSI during normal operation, but let's see what others say about that. So if you find a safe way to put between 50 and 75 PSI to it, that should work. You could probably take it to a radiator shop if you would rather do that, and let them pressure test ot for you.

 

[celeryman22]

Thanks, I have seen things about flushing the old oil out. What should I use to do this. If possible I would like to keep the evaporator since its 290.00 bucks.

 

[72VETTE454]

There are kits available for flushing A/C systems. Any auto parts store should have them. Although the dishwasher might be tempting...:L

 

[Tom73]

Hi guys, does teh evaporator on our AC systems ever go bad?

Yep, they work just like the heater core but under much higher pressures, so they can develop leaks.

tom...