Operation CHARM: Car repair manuals for everyone.
Home >> Volvo >> 1994 >> 850 L5-2.4L VIN 55 B5254S >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - HVAC >> Control Module HVAC >> Service and Repair
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Control Module HVAC: Service and Repair

Removal and Installation:

- Turn ignition off.
- Disconnect battery negative lead.
- Remove radio.





- Insert hand underneath control module.
- Push up locking button on underside of control module.
- Push control module loose from behind (from one rear corner).





- Remove control module.
- Install in reverse order of removal.
pro multis · About Operation CHARM