1994 V6 Le Ac Problem Pls. Help

[tondoboy]

hI i'm new to this forum. I am perplexed on what the problem is for my 94 camry airconditioning. I currently had the mechanic check if there is a leak on my AC and did not find any problem. I also found out that the AC relay fuse was blown and replaced it. The problem is the AC works when the engine is cold but after running for 20 minutes the ac starts to blow regular air. In addition I had the freon recharge.
I appreciate all the help you guys can give me. Summer in Hawaii is no fun and I need my AC to work.

Thanks

[chronoti]

after it starts blowing warm check the pressure might be a clogged expansion valve

[camry6]

Originally Posted by tondoboy

hI i'm new to this forum. I am perplexed on what the problem is for my 94 camry airconditioning. I currently had the mechanic check if there is a leak on my AC and did not find any problem. I also found out that the AC relay fuse was blown and replaced it. The problem is the AC works when the engine is cold but after running for 20 minutes the ac starts to blow regular air. In addition I had the freon recharge.
I appreciate all the help you guys can give me. Summer in Hawaii is no fun and I need my AC to work.

Thanks

Have the A/C system pressures checked. Sounds like an overcharged system.....possibly. Check the condenser, If it is dirty it will cause a high condensing pressure (head pressure). Hose it out with a garden hose, should do this once or twice a year anyway. (don't use high pressure or it will collapse the fins and block the air flow). The compressor may be tripping on it's high pressure switch, causing it to stop till it cools down. More detailed step for step chain of events will be more helpful in diagnosing the problem.

[Stillrunning]

Originally Posted by tondoboy

I currently had the mechanic check if there is a leak on my AC and did not find any problem. In addition I had the freon recharge.

Those two statements don't make sense. If the mechanic didn't find a leak why was the system recharged? OR, was the system low and recharged then inspected for leaks - and none found? Is this system R12 or 134a refrigerent? A leak in the condensor is very difficult to find. Did the "regular" air happen all of a sudden or did this happen gradually? Is the mechanic a general mechanic or A/C specialist?

I also found out that the AC relay fuse was blown and replaced it.

A relay is not a fuse. Which relay, there is more than one for the A/C system.? Did this problem exist before the relay was replaced or after?

The problem is the AC works when the engine is cold but after running for 20 minutes the ac starts to blow regular air.

Blowing "regular" air could be many things. Compressor clutch, low pressure, high pressure, bad water valve, malfunctioning blend doors, air in system. You need to take it to an A/C technician when it's blowing "regular" air and start by taking system pressures and go from there.