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Four Seasons 74795 HVAC Heater Control Valve
| Brand | Four Seasons 74795 |
|---|---|
| Bypass? | No |
| Description | Heater Valve In-line Restrictor |
| 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 | In-line Restrictor |
| Style | Non-Bypass |
| Type | Heater Valves |
| Product line | In-line Restrictor |
| Fits | Chrysler, Dodge, Chevrolet, Cadillac, and Buick · 32 vehicles |
OE replacement. Direct-fit heater valve with a non-bypass design.
In-line restrictor. Controls coolant flow through the heater valve.
Plastic construction. Lightweight material for the HVAC system.
Cross-references Four Seasons 74795, Global Parts Distributors LLC 8211249 and Monroe Shocks & Struts 5961 for the same application. See all 21.
Heater Valve In-Line Restrictor
Four Seasons 74795 is an OE replacement HVAC heater control valve built as an in-line restrictor with a non-bypass design. It uses a plastic body with two hose connectors and a 0.625 in. (15.875 mm) opening for direct heater hose flow control.
Compatible With select Chrysler, Dodge, Cadillac, Chevrolet, and Buick applications, including 2001 Chrysler Town & Country, 2001 Dodge Caravan, 2001 Dodge Grand Caravan, and 1992-1996 Chevrolet Caprice and Impala heater systems. Four Seasons 74795 is also listed for 1992-1996 Chevrolet Corvette applications and related GM full-size platforms.
Key Features
- Four Seasons In-line Restrictor product line
- Part number 74795
- OE replacement heater valve for HVAC temperature control systems
- Non-bypass, in-line restrictor operation
- Plastic construction with 2 hose connectors
- 0.625 in. / 15.875 mm opening
- Direct-fit style for listed vehicle applications
Detailed Description
This heater valve in-line restrictor regulates coolant flow through the heater circuit to support proper cabin temperature control. The Four Seasons 74795 is a non-bypass valve designed for applications that use an in-line restrictor rather than a bypass-style heater valve. It is an OE replacement part for vehicles such as the Chevrolet Corvette, Chevrolet Caprice, Chevrolet Impala, Buick Roadmaster, and select Chrysler and Dodge minivans.
This part cross-references Monroe Shocks & Struts (e.g., 5961, 902008) for the same application.
What It Is Used For
- Restoring heater coolant flow control when the original valve sticks open or closed
- Correcting weak or inconsistent cabin heat
- Replacing a cracked or leaking plastic heater valve body
- Addressing restricted heater performance caused by a worn in-line restrictor
Installation Notes and Tips
Verify hose size, connector count, and opening size before installation. Match the replacement to the vehicle’s original heater valve style, since this part is a non-bypass in-line restrictor and should be used where that configuration is specified. Inspect heater hoses and clamps for wear before reconnecting the system.
Quality Assurance
Four Seasons catalogs this part as an OE replacement HVAC heater control valve for the listed applications. Confirm fitment against the vehicle’s original part number and heater valve configuration before installation.
| Year | Make | Model | Submodel | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2001 | Chrysler | Town & Country | — | — | — | — | N/A | Flow Restriction Valve; In-line Restrictor |
| 2001 | Dodge | Caravan | — | — | — | — | N/A | Flow Restriction Valve; In-line Restrictor |
| 2001 | Dodge | Grand Caravan | — | — | — | — | N/A | Flow Restriction Valve; In-line Restrictor |
| 2000 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1999 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1998 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1997 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1996 | Cadillac | Commercial Chassis | Brougham | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1996 | Cadillac | DeVille | — | — | — | — | N/A | In-line Restrictor |
| 1996 | Cadillac | Fleetwood | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1996 | Chevrolet | Caprice | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1996 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1996 | Chevrolet | Impala | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1995 | Cadillac | Commercial Chassis | Brougham | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1995 | Cadillac | Fleetwood | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1995 | Chevrolet | Caprice | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1995 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1995 | Chevrolet | Impala | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1994 | Cadillac | Commercial Chassis | Brougham | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1994 | Cadillac | Fleetwood | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1994 | Chevrolet | Caprice | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1994 | Chevrolet | Commercial Chassis | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1994 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1994 | Chevrolet | Impala | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1993 | Buick | Roadmaster | — | Sedan | 5.7L | V8 | N/A | In-line Restrictor |
| 1993 | Buick | Roadmaster | — | Wagon | 5.7L | V8 | N/A | Valve; In-line Restrictor |
| 1993 | Chevrolet | Caprice | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1993 | Chevrolet | Commercial Chassis | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1993 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
| 1992 | Chevrolet | Caprice | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1992 | Chevrolet | Commercial Chassis | — | — | — | — | N/A | Flow Restrictor; In-line Restrictor |
| 1992 | Chevrolet | Corvette | — | — | — | — | N/A | In-line Restrictor |
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