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Four Seasons 74641 HVAC Heater Control Valve
| Brand | Four Seasons 74641 |
|---|---|
| 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 B MM | 15.875 |
| Opening IN | 0.625 |
| Opening MM | 15.875 |
| Operation Type | Cable |
| Style | Non-Bypass |
| Type | Heater Valves |
| Product line | Heater Valve |
| Fits | Toyota · 5 vehicles |
OE replacement. Cable-operated heater valve for straightforward installation.
Non-bypass design. Helps control coolant flow without routing it around the valve.
Plastic construction. Lightweight material with two hose connectors for a clean fit.
Cross-references Four Seasons 74641, Global Parts Distributors LLC 8211259 and 246129 for the same application. See all 14.
OE Heater Control Valve for Toyota HVAC
The Four Seasons 74641 is an OE replacement HVAC heater control valve built for cable-operated heating systems. It uses a non-bypass design with two hose connectors and a 0.625 in. (15.875 mm) opening, making it a direct-fit service part for restoring coolant flow control in the heater circuit.
Compatible with 1986-1989 Toyota Celica and 1988 Toyota Camry heater valve applications, this Four Seasons Heater Valve line part is built for vehicles that use a cable-actuated valve rather than a vacuum or electric unit. The 74641 part number is commonly searched for Toyota Celica heater valve and Toyota Camry heater control valve replacement needs.
Key Features
- Four Seasons Heater Valve line, part number 74641
- Cable-operated open non-bypass heater valve
- OE replacement design for factory-style fit and function
- Plastic construction
- Two hose connectors
- 0.625 in. / 15.875 mm opening size
- Non-bypass style for direct heater circuit control
Detailed Description
The Four Seasons 74641 HVAC heater control valve regulates coolant flow to the heater core in cable-operated systems. Its non-bypass configuration means the valve controls flow without routing coolant around the heater circuit, which is important for maintaining the original HVAC behavior on the listed Toyota applications. If you are replacing a worn or leaking Toyota Celica heater valve or servicing a 1988 Toyota Camry heater control valve, this OE-style part is built to match the original operating layout.
This part cross-references Global Parts Distributors LLC 8211259 for the same application.
What It Helps Fix
- Heater output stuck on or stuck off
- Coolant leakage at the heater valve
- Broken or binding cable-operated valve movement
- Inconsistent cabin heat control
- HVAC performance issues caused by a failing heater control valve
Installation Notes and Tips
- Verify the vehicle uses a cable-operated, non-bypass heater valve before installation.
- Match the hose connector count and opening size to the original part.
- Inspect heater hoses and clamps during replacement to confirm a secure seal.
- Bleed the cooling system after service to remove trapped air.
- Confirm cable travel and valve movement before returning the vehicle to service.
Quality Assurance
Four Seasons supplies OE replacement HVAC components, and the 74641 heater valve is built to follow factory-style specifications for the listed Toyota fitments.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1989 | Toyota | Celica | — | — | N/A | Heater Valve |
| 1988 | Toyota | Camry | — | — | N/A | Heater Valve |
| 1988 | Toyota | Celica | — | — | N/A | Heater Valve |
| 1987 | Toyota | Celica | — | — | N/A | Heater Valve |
| 1986 | Toyota | Celica | 2.0L | L4 | N/A | Heater Valve |
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