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How do you know if it is a compressor problem if you hear sound coming from under the bonnet when you turn on the AC switch?


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Wiki User
2015-07-15 19:20:34
2015-07-15 19:20:34

Hey Rajesh==Get a 2 foot length of hose and listen at one end while moving the other around the compressor etc and you will hear what is making the noise. GoodluckJoe


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The cycle switch not engaging the Compressors clutch

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The most likely reason the compressor is not coming on is because you are low on freon. The low pressure switch will keep the compressor from cycling on because damage to your compressor would result. You can jumper across the low presure switch with the engine running and A/C turned on, ( for short time only) this will provide you with question is my compressor clutch good, or am I just low on freon. The AC compressor relay switch may need to be replaced

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Either low on freon or the low pressure switch is bad. You are gonna have to put a set of gauges on it. Usually this happens when the freon leaks out of the system. If there is not enough freon in the system, the low pressure switch keeps the compressor from coming on and being burned up.

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What kind of car and which switch. There are several that can effect compressor operation.

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