Another AC question

[karazy]

95 LE
The AC is not a cold as it should be. It doesn't look like there are any bubbles in the fluid. There is leak detect in the fluid and no signs of leaking.
The compressor runs in a 30 sec on and 10 sec off cycle, and you can hear the relay click when this happens. Is this normal? The relay is not hot to touch.

[Nico]

low charge ...

[karazy]

Would a can of Qwikboost do the trick?

[Nico]

Originally posted by karazy
95 LE
There is leak detect in the fluid and no signs of leaking.

Sorry I read too quickly and didn't see that.
Some leaks are very hard to detect especially when they are in some hidden places like the evaporator (common leak problem on these cars).
First try to put a can of r134 with some dye and it will show you any possible leak very quickly

[Nico]

Quickboost is that some stuff to block leaks ? That would be good for some time but I don't think it would be reliable on the long run. That all depends if you want to keep the car for several years or not...

[MCTOY]

I'm with Nico on this one.....slightly low charge. As the refrigerant begins to flow thru the metering device it normally 'flashes' (Changes from liquid to vapor) and develops the low side pressure. With a slight low charge, the flash temperature (Evaporator) would be lower, thus creating a lower pressure, and possibly tripping out the low pressure safety switch. When the sytem shuts off, ambient temp. of the engine bay brings the refrigerant temp/pressure back up so the compressor starts again. Do you have walmart near you? They sell interdynamics brand refrigerant with sealer in it. I'm not a huge fan of the sealers, but there are times when you just cannot find/repair the leak. Good luck.
MCTOY

[karazy]

Quickboost is that some stuff to block leaks ?

No, it's a 3 oz. can of stuff, supposedly designed by NASA to make any AC system colder. I never heard of it, until I found it while searching for a cure.