I got a certified used car a while back, but the AC sometimes takes a while for it to cool. When it does cool, it doesnt seem to be all that cold. When the car is not moving, i can hear the compressor running for approx 10 seconds on, then 10 seconds off then 10 seconds on and so forth.

I asked around, a honda mechanic said i should take a thermostat and put it on the vent and if it reads 41 degrees, then it's all ok.

I thought about getting a can of r134a from the local auto shop and adding some. it has a gauge on it, but i'm not sure if all AC systems are under the same psi specs.

suggestions anyone? I really don't want to pay the honda dealer 120 bucks to vacuum the system and re-fill.

Suggestions are welcome.

Thanks!
-Brian

p.s. average outside temps are 84-95 (Md/DC area)