Four Seasons 74644 HVAC Heater Control Valve
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Four Seasons
 Heater Valve

Four Seasons 74644 HVAC Heater Control Valve

Brand Four Seasons 74644
Bypass? No
Description Cable Operated Open Non-Bypass Heater Valve
Hose Connector Quantity 2 Connectors
Material Plastic
O.E. Replacement? Yes
Opening B IN 0.625
Opening IN 0.625
Operation Type Cable
Style Non-Bypass
Type Heater Valves
Product line Heater Valve
Fits Toyota · 6 vehicles

OE replacement. Direct-fit heater valve for straightforward installation.

Cable operated. Uses cable control for simple, reliable operation.

Non-bypass style. Helps regulate coolant flow through the heater circuit.

Cross-references Four Seasons 74644, UAC HV1223C and 800510 for the same application. See all 11.

$44.80Free shipping
In stock · usually ships same day before 1pm CST
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Free returns within 60 days if it doesn't fit when fitment is verified.
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OE Heater Control Valve for Tacoma

Four Seasons 74644 is an OE replacement HVAC heater control valve for 1995-2000 Toyota Tacoma models. It uses cable operation and a non-bypass design to regulate coolant flow through the heater circuit, helping restore proper cabin heat control.

Key Features

  • Fits 1995-2000 Toyota Tacoma, heater valve
  • Cable operated open valve for direct heater control
  • Non-bypass style for the specified application
  • Plastic construction for HVAC use
  • Two hose connectors with 0.625 in. openings
  • OE replacement part for factory-style service

Detailed Description

Four Seasons Heater Valve 74644 is built for the Toyota Tacoma heater circuit and matches the original equipment style used on 1995-2000 trucks. This HVAC heater control valve is cable operated, opens non-bypass, and uses two hose connections with 5/8 in. openings to manage coolant flow to the heater core. If you are replacing a leaking, sticking, or broken Tacoma heater valve, this part number 74644 provides the correct OE replacement format for the listed application. This part cross-references UAC HV1223C for the same application.

Common Problems This Part Can Help Solve

  • No cabin heat due to a valve that will not open
  • Coolant leakage at the heater valve body or hose connections
  • Stiff, broken, or disconnected heater control cable operation
  • Inconsistent heater output in a 1995-2000 Toyota Tacoma
  • Restricted coolant flow through the heater circuit

Installation Notes and Tips

Verify the valve style, hose connector count, and 0.625 in. openings before installation. Confirm cable operation and hose routing match the original Toyota Tacoma heater valve layout. Inspect the heater hoses and clamps for wear before transferring the new valve into service.

Quality Assurance

Four Seasons 74644 is an OE replacement heater valve from the Four Seasons Heater Valve line, built to match the factory application for the listed Toyota Tacoma models.

Related reading

This part fits 6 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2000ToyotaTacomaN/AHeater Valve
1999ToyotaTacomaN/AHeater Valve
1998ToyotaTacomaN/AHeater Valve
1997ToyotaTacomaN/AHeater Valve
1996ToyotaTacomaN/AHeater Valve
1995ToyotaTacomaN/AHeater Valve
Directly replaces or cross-references 11 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 74644UAC — HV1223C800510155072566013701117464419144798191932258724004020CWK800510H77831