Coolant Issues

[Conspirator05]

I need some ideas...

1) I keep running low on coolant. I haven't seen any smoke coming out of the exhaust.2) If I don't have the air running, it'll be about a week or two before my light comes on and I'm low on coolant. HOWEVER, if I do have my air running, the next day the light comes on and I'm low.

Any ideas? Heater core maybe? Blower? Water pump leak?

[kefferjoe]

possibly a bad radiator cap?? or your heater core too

[evildky]

if you are runnign your air your engine will tend to run a bit hotter as the condensor heats the air before the radiator gets it, you migh have a pinhole leak at or near the radiator, try getting ahold of a cooling system rpessurizer that'll make finding any leaks a lot easier