Four Seasons HVAC Heater Control Valve 74612
Four Seasons HVAC Heater Control Valve 74612 - view 2
Four Seasons HVAC Heater Control Valve 74612 - view 3
Four Seasons HVAC Heater Control Valve 74612 - view 4
Four Seasons HVAC Heater Control Valve 74612 - view 5
Four Seasons HVAC Heater Control Valve 74612 - view 6
Four Seasons HVAC Heater Control Valve 74612
Four Seasons HVAC Heater Control Valve 74612 - view 2
Four Seasons HVAC Heater Control Valve 74612 - view 3
Four Seasons HVAC Heater Control Valve 74612 - view 4
Four Seasons HVAC Heater Control Valve 74612 - view 5
Four Seasons HVAC Heater Control Valve 74612 - view 6

Four Seasons HVAC Heater Control Valve P/N:74612

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$15.99
MPN: 74612
Item Package Quantity: 1
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Four Seasons HVAC Heater Control Valve P/N:74612
Four Seasons HVAC Heater Control Valve P/N:74612
$15.99

Keep cabin heat under control with the Four Seasons heater control valve 74612, a vacuum-controlled, non-bypass valve that regulates coolant flow to the heater core so the system can deliver the temperature you select. It's a direct-fit replacement for a long list of classic GM, AMC/Eagle and Ford applications, including the 1973-1978 AMERICAN MOTORS GREMLIN, 1976-1984 BUICK LESABRE, 1976-1987 BUICK REGAL, 1980-1984 CADILLAC DEVILLE, 1975-1986 CHEVROLET C10 and many more — see the Buyer's Guide tab for the full list of 166 applications.

  • Vacuum controlled: a vacuum signal actuates the valve, which closes on vacuum in this non-bypass design.
  • Temperature tested to 270°F: validated to withstand under-hood heat.
  • Pressure tested: checked for a leak-free design.
  • Application-specific design: built for the listed vehicles.

This is the FRONT heater control valve. Signs the original may need replacing include coolant weeping from the valve, heat that won't shut off or won't warm up, or a valve that no longer responds to its vacuum signal. If a failed control valve is the cause, this Four Seasons unit replaces it. Backed by over 50 years of Four Seasons mobile A/C experience.

Frequently Asked Questions

What does the Four Seasons 74612 heater control valve do?

It regulates coolant flow to the heater core so the HVAC system can control cabin temperature. This is a vacuum-controlled, non-bypass valve that closes on vacuum.

Is this a vacuum-operated valve?

Yes. It is vacuum controlled and closes when vacuum is applied, in a non-bypass design. Confirm your vehicle uses a vacuum-actuated valve before ordering.

Will this valve fit my vehicle?

It fits 166 listed applications across GM, AMC/Eagle and Ford models from the 1970s through the 2000s. Check the Buyer's Guide tab to confirm your exact year, make and model.

What are signs my heater control valve needs replacing?

Coolant seeping from the valve, cabin heat that won't shut off or won't warm up, or a valve that no longer responds to its vacuum signal. Diagnose the cause before replacing.

Has this valve been tested?

Yes. Four Seasons temperature tests it to 270°F and pressure tests it for a leak-free design, backed by over 50 years of mobile A/C experience.

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