UK_chevyV8

I have a 1999 Z28 and we are just starting to get cold weather, the problem is that the air con seems to be set to not work below 4 degrees C, so for the next few months the cars windows will get covered in condensation for the first 5 minutes, is this the same for everyone else and is there something I can do to solve the problem?

Dave89IROC

It should work, the air conditioning should run when the controls are on defrost..........

UK_chevyV8

Maybe it is a mod for European cars only, I had a look in the Ownes Manual on page 46 and it says "The A/C compressor will operate in this mode if the outside temperature is above 4 degrees C.
It really is a stupid thing to have done and if it is possible to stop it I will.

UK_chevyV8

Can anyone else help with this please?

white/blackss

lemme try, ok as the air outside gets colder, the freon actually loses pressure.

as the air outside warms up the system builds up pressure.

now, if they put more freon in the system whem it was cold outside the compressor would run but when it warmed up the pressure would be so great that it would destroy the a/c system.

there is pressure sensors in the system that always monitor the pressures and are always communicating with the pcm witch controls the a/c compressor.

if they just made the compressor run anyway with low pressure it would ruin the compressor and probably the reciever dryer and orfice tubes.

so basically your just gonna have to deal with it, hope this helps.

Lt1t56

white/blackss tells the facts.
The colder it gets, the less your compressor will engage.