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 MANUALSBMW1987L7 (E23) L6-3430CC 3.4L SOHC (M30)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGRELAYS AND MODULES - HVACCONTROL MODULE HVACSERVICE AND REPAIR
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Control Module HVAC: Service and Repair
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Service and Repair
Remove
- Remove screws 1 - 4 and take off the trim.
- Take off the protective cap.
- Detach plugs 1 and 2.
- Disconnect the linkage (1) and remove screws (2) and (3).
- Take out the control unit.
Refit
- Using threaded bushing (1), preload by approximately 3 mm (0.120") against the stop (with regulator setting 15°C/60°F).
Trim Panel Screws:
- Remove screws 1 - 4 and take off the trim.
- Take off the protective cap.
Control Unit Connector:
- Detach plugs 1 and 2.
Control Unit Lever:
- Disconnect the linkage (1) and remove screws (2) and (3).
- Take out the control unit.
Refit
Linkage:
- Using threaded bushing (1), preload by approximately 3 mm (0.120") against the stop (with regulator setting 15°C/60°F).
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.