Edmunds Answers

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  • avatar karjunkie 06/24/09 8:48 am PST

    On many systems, the compressor will not turn on if the refrigerant is low because the "low pressure safety switch" prevents the compressor clutch from engaging if system pressure is low. This protects the compressor from possible damage caused by a lack of lubrication.If your compressor comes on, then there is sufficient refrigerant for the system to work. I suspect you have a clogged component that is causing blockage to the evaporator and preventing it from cooling. That is why the tube gets as hot as you describe. To cure this and prevent damage to the system, the system should be completely evacuated and refilled with refrigerant. This should be done by a professional with a vacuum pump to be done right. It's usually not an expensive procedure. Do it before you damage the compressor which is a very expensive part. Good luck!

Answers

  • karjunkie 06/24/09 8:48 am PST

    On many systems, the compressor will not turn on if the refrigerant is low because the "low pressure safety switch" prevents the compressor clutch from engaging if system pressure is low. This protects the compressor from possible damage caused by a lack of lubrication.If your compressor comes on, then there is sufficient refrigerant for the system to work. I suspect you have a clogged component that is causing blockage to the evaporator and preventing it from cooling. That is why the tube gets as hot as you describe. To cure this and prevent damage to the system, the system should be completely evacuated and refilled with refrigerant. This should be done by a professional with a vacuum pump to be done right. It's usually not an expensive procedure. Do it before you damage the compressor which is a very expensive part. Good luck!

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