damm air con............. - Alfa Romeo Forum
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Help damm air con.............

hi...id really appreciate sum help here....my air con dont work...it a 99 ts..ive checked the lectrucs and found a relay on drivers side..under bonnet which if shorted out activates the electro clutch on the air con compressor. so i can run it manually if i bridge out the relay. however, still no cold air!..i gues i need to check the gas....which i will. However..why wont the relay pull in automatically?...it not a fuse problem. ive checked the wiring and im getting 12 volts on the coil of the relay[permanently]...but the earth wire seems to be pulsing?...if i put this to ground the compressor operates.!...any ideas where to look?
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Re: damm air con.............

The coil connections should be switched - not permanent 12v - I think. The permanent 12v should go to one of the larger connectors that are switched by the coil.
Is the relay mounted in front of the battery (like the 146), if so then check that the wires to the terminals aren't corroded and broken (like my 146).
Also I think there is a pressure switch in the circuit, not sure but I think this stops the system from working if there's no coolant (and no pressure).
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Re: damm air con.............

there are some switches around the system which check for gas/pressure.
on my car the switch near the drier filter had kicked in due to a leak in pressure.
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