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 MANUALSPONTIAC1987FIERO BASE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C-HEATER SYSTEM - MANUALREMOVAL & INSTALLATIONPRESSURE CYCLING SWITCH R & I
1987 Pontiac Fiero Base, Automatic
Pressure Cycling Switch R & I
1987 Pontiac Fiero Base, AutomaticSECTION Pressure Cycling Switch R & I
- The fitting on the accumulator is equipped with a Schrader-type valve, making system discharge unnecessary. Disconnect battery ground cable and wires at switch.
- Unscrew switch from accumulator. When installing switch, use a new "O" ring lubricated with clean refrigerant oil. Do not overtighten.
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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.