Hi,
I have a Mk 3 Mondeo on an 03 plate. I noticed recently that the heater was constantly blowing cold air and am about to replace the thermostat as a matter of course. I found out last night though that the a/c compressor is running when the engine is on despite the a/c button being switched off. I removed the fuse in the battery fuse box and the compressor turned off, i swapped the relay with the horn one as they are the same to see if relay was at fault but it wasn't. Can any one help?

Cheers

Pogo

[quote name='Pogo' post='33125' date='Jul 15 2009, 08:27 PM']Hi,
I have a Mk 3 Mondeo on an 03 plate. I noticed recently that the heater was constantly blowing cold air and am about to replace the thermostat as a matter of course. I found out last night though that the a/c compressor is running when the engine is on despite the a/c button being switched off. I removed the fuse in the battery fuse box and the compressor turned off, i swapped the relay with the horn one as they are the same to see if relay was at fault but it wasn't. Can any one help?

Cheers

Pogo

[/quote]
dont it come on when the dial is in a certen place on heater control

[quote name='dezwez' post='33577' date='Jul 20 2009, 09:00 PM']dont it come on when the dial is in a certen place on heater control[/quote]

Its the digtal system, so should only come on when the a/c button is on, but mine is still running with the button off