BMW e46 aircon diagnosis

[reaper82uk]

My fans are not blowing (well sometimes on sometimes not at all have a mind of their own) how do I check if it's a heater resistor or the actual fan itself? Or any other advice to repair this issue, the temperature in the car changes as it should thought

[tgr]

take it out of auto (assuming you have climate control) and max and min it a few times to see if it responds instantaneously. also do the air recirculate. if it's better, it could be that you have a blocked microfilter - when was it last changed? changing it is as easy as pie and an OEM filter is GBP15 from GSF

that's enough to be getting on with