Pogo Posted July 15, 2009 Share Posted July 15, 2009 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 Link to comment Share on other sites More sharing options...
dezwez Posted July 20, 2009 Share Posted July 20, 2009 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 dont it come on when the dial is in a certen place on heater control Quote Link to comment Share on other sites More sharing options...
Pogo Posted July 20, 2009 Author Share Posted July 20, 2009 dont it come on when the dial is in a certen place on heater control 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 Quote Link to comment Share on other sites More sharing options...
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