Four Seasons HVAC Heater Control Valve P/N:74914
Keep cabin heat under control with the Four Seasons heater control valve, part number 74805 — a vacuum-operated valve that regulates the flow of engine coolant to the heater core. It's an application-specific, direct-fit replacement for many vehicles, including the 1987-1995 Chevrolet Camaro, 1989-1996 Chevrolet Caprice and 1991-1994 Chevrolet Commercial Chassis.
The heater control valve meters how much hot engine coolant reaches the heater core, controlling the heat delivered to the cabin. When the valve sticks or leaks, you may notice heat that won't shut off, weak or no heat, or coolant seepage — if a failed valve is the cause, this replaces it. Backed by over 50 years of mobile A/C experience from Four Seasons.
See the Buyer's Guide tab for the full list of applications.
What does an HVAC heater control valve do?
It regulates the flow of hot engine coolant to the heater core, controlling how much heat is delivered to the cabin. This unit is vacuum-operated and opens using engine vacuum.
Is this the right Camaro heater control valve for a 1987-1995 Chevrolet Camaro?
Yes, it is listed for the 1987-1995 Chevrolet Camaro with all engines. The Buyer's Guide tab shows the full list of applications.
How is this valve operated?
It is vacuum controlled, using engine vacuum to open the non-bypass valve and route coolant to the heater core.
What are signs this valve may need replacing?
Common signs include heat that won't shut off, weak or no cabin heat, or coolant seepage at the valve. Diagnose the cause first, as other parts can produce similar symptoms.
What is the valve made of and how is it tested?
It uses plastic construction with three connectors, is temperature tested to 270 degrees F, and is pressure tested to ensure a leak-free design.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.