Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1982CAVALIER L4-112 1.8LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTA/C COMPRESSOR - LOADING/LOW ENGINE IDLE IN DEFROST MODE
1982 Chevrolet Cavalier L4-112 1.8L
A/C Compressor - Loading/Low Engine Idle in Defrost Mode
1982 Chevrolet Cavalier L4-112 1.8LSECTION A/C Compressor - Loading/Low Engine Idle in Defrost Mode
Number: 83-139
Section: 1B (Ia)
Date: June, 1984
Subject: A/C COMPRESSOR LOADING IN DEFROST MODE
Model and Year: 1982-83 CELEBRITY, CAVALIER, AND CITATION
TO: ALL CHEVROLET DEALERS
"Please discard previous bulletin 83-T-78, Section 1, issued September, 1983 due to change in part numbers and diagram."
Low engine idle can be caused by high A/C compressor loads due to high head pressures resulting from compressor operation without engine cooling fan operation while in defrost mode.
This condition can be corrected by installing an additional engine cooling fan relay, P/N 14078902 for Celebrity and Citation models or P/N 14073422 for Cavaliers, (see diagram) to operate the engine cooling fan in defrost model. A connector body, P/N 12010015, and terminal ends, P/N 8905087, are available through WDDGM for simplification of the installation of the additional cooling fan relay mentioned in the above article..
The relay should be installed on the cowl, adjacent to the pressure cycling switch. Any wiring run through the cowl should be routed through existing grommets and care be taken to maintain cowl sealing.
WARRANTY INFORMATION
Labor Operation Number: T1094
Labor Time : .4 hours
Section: 1B (Ia)
Date: June, 1984
Subject: A/C COMPRESSOR LOADING IN DEFROST MODE
Model and Year: 1982-83 CELEBRITY, CAVALIER, AND CITATION
TO: ALL CHEVROLET DEALERS
"Please discard previous bulletin 83-T-78, Section 1, issued September, 1983 due to change in part numbers and diagram."
Low engine idle can be caused by high A/C compressor loads due to high head pressures resulting from compressor operation without engine cooling fan operation while in defrost mode.
Engine Cooling Fan Relay:
This condition can be corrected by installing an additional engine cooling fan relay, P/N 14078902 for Celebrity and Citation models or P/N 14073422 for Cavaliers, (see diagram) to operate the engine cooling fan in defrost model. A connector body, P/N 12010015, and terminal ends, P/N 8905087, are available through WDDGM for simplification of the installation of the additional cooling fan relay mentioned in the above article..
The relay should be installed on the cowl, adjacent to the pressure cycling switch. Any wiring run through the cowl should be routed through existing grommets and care be taken to maintain cowl sealing.
WARRANTY INFORMATION
Labor Operation Number: T1094
Labor Time : .4 hours
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.