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Four Seasons 74864 HVAC Heater Control Valve
| Brand | Four Seasons 74864 |
|---|---|
| Hose Connector Quantity | 2 connectors |
| Description | Cable operated open non-bypass heater valve |
| Fitting Size End 1 | 0.75 |
| Material | Steel |
| O.E. Replacement? | Yes |
| Opening B IN | 0.500 |
| Opening B MM | 12.700 |
| Opening IN | 0.750 |
| Opening MM | 19.050 |
| Operation Type | Cable |
| Style | Non-bypass |
| Type | Heater valves |
| Fits | — |
OE replacement. Direct-fit heater valve for straightforward installation.
Cable operated. Uses cable control for simple temperature regulation.
Steel construction. Built with a durable metal body and non-bypass design.
Cross-references Carlson 15192, Febi-Bilstein 100831 and Four Seasons 74864 for the same application. See all 21.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Four Seasons 74864 Heater Valve Overview
Four Seasons 74864 is an OE replacement HVAC heater control valve built for cable-operated temperature control systems. This heater valve uses a non-bypass design with a steel body and two hose connectors, making it a direct-fit service part for restoring coolant flow control in the heater circuit.
For drivers searching for a heater control valve for Ford, Chevrolet, or GMC applications, this Four Seasons heater valve is built around the original equipment style and opening dimensions needed for accurate fitment and dependable HVAC operation.
Key Features
- Part number: 74864
- Four Seasons Heater Valve product line
- Cable-operated open non-bypass heater valve
- OE replacement design
- Steel construction
- Two hose connectors
- 0.750 in. opening size with 0.500 in. secondary opening dimension
- Non-bypass style for direct heater circuit control
Product Details
This HVAC heater control valve regulates coolant flow to the heater core through a cable-operated mechanism. The non-bypass configuration is used where the valve opens and closes the heater circuit without routing coolant around the core. Four Seasons 74864 is built to match OE-style service requirements and is a practical choice when replacing a worn, sticking, or leaking heater valve on Ford, Chevrolet, and GMC vehicles that use this style of control.
This part cross-references Carlson 15192 and Febi-Bilstein 100831 for the same application.
Common Problems This Part Can Address
- Heater output stuck on hot or cold
- Coolant leakage at the heater valve body
- Broken or binding cable-operated temperature control
- Restricted coolant flow to the heater core
- Inconsistent cabin heat control
Installation Notes and Tips
Confirm hose connector size, opening dimensions, and cable operation before installation. Inspect heater hoses, clamps, and the control cable for wear while servicing the valve. Verify the valve orientation and coolant flow path match the original layout before refilling and bleeding the cooling system.
Quality Assurance
Four Seasons markets this heater valve as an OE replacement part for HVAC temperature control service. Part number 74864 is built to the specified steel, cable-operated, non-bypass design for accurate replacement in the original application.
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