84-89 Air Conditioning Compressor Refrigerant Pressure Switch (ND)

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This switch turns the radiator cooling fan on when the a/c system high side pressure reaches approximately 238 PSI. Air flow across the a/c condenser is imperative to prevent high side a/c pressures from causing system damage (blown hoses typically).When the a/c pressures go above 350 PSI so does
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454645
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Description
This switch turns the radiator cooling fan on when the a/c system high side pressure reaches approximately 238 PSI. Air flow across the a/c condenser is imperative to prevent high side a/c pressures from causing system damage (blown hoses typically).When the a/c pressures go above 350 PSI so does the temperature of the refrigerant on the high side. The resulting temperatures can also damage compressor seals. The switch in the compressor is a normally open switch, at 238 PSI it closes latching the fan relay.

Electrical components such as switches are non-returnable parts.

Always refer to a factory service manual when diagnosing engine service problems. You can damage electrical components if the proper procedures are not followed. Be sure you are replacing the correct part.
Specifications
GM Item No. 89019195 2724279
Base Unit of Measure EA
Net Weight 0.1
Special Order False
Car Years 1 1984 1985 1986 1987 1988 1989
Part # 454645
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