TheEinstein. When the A/C is running, the low side (larger of the two A/C lines) should be sweating. If no moisture accumulation (condensation) is appearing on the line, it may not have a pure refrigerant charge. If it is covered in frost after running, that is a sign of low refrigerant pressure. When the A/C is switched on, the electric fan is not immediately activated. After the engine is switched off, the fan may continue to operate at varying speeds (based. on the ECM calculated catalyst temperature). This will cool the radiator down from a heat. surge (up to 10 minutes). The BMW 330i AC or heating fan not working can be caused by a variety of issues, including a faulty blower motor, fuse, resistor, or control module. Additionally, a clogged cabin air filter or inadequate refrigerant levels can also affect the performance of the fan. Air Conditioning not working? AC not blowing out cold? In this video I show you some quick easy tips on how to get your AC in your car to start working again Recharged my AC today because the center vents were hissing, indicating low refrigerant level. Running the AC on max, connected the can & gauge to the low pressure line and got a reading of 25 PSI. Charged to 35 PSI and hissing is gone, air is ice cold, and cost about $20 bucks. R. 2003 bmw x5 compressor won't come on, replaced condensor fan , replaced clutch fan, ac sensor , when jumped it comes on. please help me, have ordered ac insturment panel, will replace in 3 hours. … read more Hi All, My E70s electric fan appears to be inop, but it's not the fan itself. When I start the car, I don't get the 20-second fan run that I've seen is standard on the car. I recently had the fan out to replace the radiator (leaking) and a few hoses (soon to be leaking). Upon reinstall, I ran the car up to 97C as reported by the Torque app on During this time,the electric fan turn on in maximum power. And don't stop, when i continued my way. On the highway, when i accelerated, the temperature decreased to 80-82 degrees. When i cruised constant speed, it was normal, 96-97 degrees. A next parkplace i stop the engine, and started again. SummitChuter Discussion starter. 8 posts · Joined 2012. #1 · Nov 5, 2012. My blower is not working at all. Not on AC or Heater. Not on any level 1-4. I replace the FSU and blower motor. Fuses labeled anything close were checked. BMW 325xi. The most common reasons a BMW 325xi heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. 0 %. 31 % of the time it's the. wFAo.