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My 1999 z71 pickup air conditioning is cooling for a few minutes and sometimes longer and then it stops cooling. The fan continues to run but the compressor apparently stops running.

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Check the low pressure switch, sit on the accumulator, on passenger side, when a/c compr is not working, wiggle the connector to the low pressure switch, 9 out of ten time's thats the problem, I have seen this many time here at my repair shop. Replace harness connector, auto parts sell this, runs about $15.00 for this, but check first before you buy it.

Posted on Jul 12, 2010

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2001 daewoo laganza a\c does not cool. Every thing seems to be working but no cold air is coming out.

Posted on Jul 15, 2010

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Posted on Jan 02, 2017

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Fan doesn't run while in idle and begins to over heat until I start driving agin then it cools back down to normal. Also the fan runs when engine is off and drains the battery.


The fan is only supposed to come on when there is excess heat .. in normal driving conditions it doesn't start. When you start your car in the morning the fan won't come on because the engine is cold.

With a hot engine - and it depends how hot the engine is - the fan will only kick in to prevent overheating. In heavy slow moving traffic or a traffic jam, the fan will kick in if needed.

The air flow through the radiator is usually sufficient -in normal driving conditions - to cool the engine.

When you park up and the car has a hot engine, the fan will kick in. This is perfectly normal. It is caused by a surge of hot coolant triggering the fan sensor. Perfectly normal.

The fan then should cut out after a while .. maybe 2-3 minutes at the most. If the fan runs continuously that suggests a fault in the temperature sensor switch.

Next time - wait by the car and see how long it takes for the fan to quit after you have parked up. It should stop of its own accord after a couple of minutes.

If the fan cuts off after a short while, and your battery is becoming drained, that's probably a battery or alternator fault.

Remember: when you start the car the fan won't kick in at idle speed because the engine is COLD, and there is no reason for the fan to start up ..
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A.

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