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 MANUALSBMW1993740IL (E32/2) V8-3982CC 4.0L DOHC (M60)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGDESCRIPTION AND OPERATIONCLIMATE CONTROL SYSTEMS, SYSTEM SPECIFICFHK (REAR CLIMATE CONTROL SYSTEM)CLIMATE CONTROL
1993 BMW 740iL (E32/2) V8-3982cc 4.0L DOHC (M60)
Climate Control
1993 BMW 740iL (E32/2) V8-3982cc 4.0L DOHC (M60)SECTION Climate Control
Operation
By switching on the FHK system, the climate control is activated via the FHK relay box and the rear shut-oft valve is switched on. The heating valve is switched on by turning one of the two temperature control wheels from the end position "COLD". By way of the flap program, the temperature is mixed between the heating element installed in the FHK and the evaporator.
By switching on the FHK system, the climate control is activated via the FHK relay box and the rear shut-oft valve is switched on. The heating valve is switched on by turning one of the two temperature control wheels from the end position "COLD". By way of the flap program, the temperature is mixed between the heating element installed in the FHK and the evaporator.
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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.