a/c help needed.

I have changed the condensor and dryer, checked the lines, and my system still has a leak. After a full charge of 134a it blows cold air for about 30 minutes to an hour and then quits blowing cold air. I've had dye put into the system and had it sniffed but I haven't been able to find anything. I really need some help. Thank you.

 

has it gotten better at holding the 134a or is it worst now since you changed those other parts?

 

if you cant find it then its probably the evaporator which is behind the dash. check for dye coming out of the drain tube for the evaporator or where ever the ac drips.

 

It's holding the 134 in the system for about the same amount of time. TrailinTaco, I haven't checked the outlet tube yet.

 

If it's that large a leak, you should be able to HEAR the gas leaking out! drive to a quiet spot, add some charge and follow your ear...

 

I've tried listening for a leak but I can't hear anything. I was told that if it was the evaporator the evidence of a leak would be contained inside the evaporator/housing. Maybe that's the reason the sniffer/UV hasn't picked it up?