cadillac Workshop Repair Guides

Cadillac Workshop Service and Repair Manuals

Heater Core > < All Technical Service Bulletins for Expansion Block/Orifice Tube:|631205A|Page 5973
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Heater Control Valve: Locations

This vehicle does not use a Heater Control Valve (Coolant Valve) as coolant is always circulated through the heater core. Rate of coolant flow through
the heater core is established by the Coolant Flow Restrictor. 

Temperature is controlled with the Air Mix Door which allows or restricts the flow of air through the heater core case.

Heater Core > < All Technical Service Bulletins for Expansion Block/Orifice Tube:|631205A|Page 5973