Re: My lg aircon fan is stuck on high what would cause...
It sounds like a pc board problem, it is easy to change, just take your model number to an agent and ask for indoor pc board replacement, it just plugs out and the new one can be plugged in
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if engine over heating coolant over flow jug will boil over you will see steam.sound like you have either faulty engine coolant temperature sensor or could have faulty fans relay or fuse or pcm problem if coolant fans dont turn on.have garage with code scanner that can do a snap shot on coolant temperature sensor check see how hot coolant temperature is see if coolant temperature over 220 degrees engine getting too hot.could have faulty water or blowed head gasket check engine oil on oil dip stick look milkly you have blowed head gasket. i use infra red laser thermometor check see how hot engine is over 107 celsius engine is overheating.
Check the fan,to make sure it is really turning fast on the high mode with ac on,not just fan.It sounds like the fan is slowing down,and not cooling the condenser,therefore cause the head pressure to rise,and producing warm air.The fan motor would have to be replaced to fix the problem if this is the case.
Check the voltage output of your car with the engine running. It should read 13 to 14 volts. only. Higher than this will cause damage to the fan motor, and other 12v gadgets in your car. Is this happening? If not, then, check the aircon evaporator for grounded wiring connections. This is the line from the fuse box terminal to the line going to the aircon. Grounded line can cause a lower voltage reaching your fan motor, forcing it to run undervoltage, overheating it. Send us your e-mail so we can give you further assistance.
having driving mine for a yr now, noticed some pulleys without a belt but never thought much about it. Thought aircon just needed service till the belt for alternater, fan, power steering snapped, the mechanic told me then that the other missing one was for aircon. Two belts plus cam belt????? driving too many things ! so just check to see if all belts are still there, they snap easily `cause of the multi purposes....
Sounds like your aircon is stuck on heating mode. Or. The outdoor fan speed is affected by ambient temperature, or low refrigerant. In heating mode the indoor fan will come on for a while to sense temperature and will then wait for the outdoor unit to pump up pressure and build up heat.
Im not that familiar with cars, but if this is a new (90 or newer) then the RPM going so high is because the fast idle switch. It does this to compensate for the extra power being used by the compressor, which isn't coming on at first. Is the electric fan coming on for the condenser coil at the same time as the compressor? You should have 2 fans, one is for the radiator water, the other is for the A/C. There are temperature controlled sensors for these fans on some models. Its possible that may have something to do with it.
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