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Four Seasons 74799 HVAC Heater Control Valve
| Brand | Four Seasons 7.5005 |
|---|---|
| Product line | Control Valve |
| Fits | —40 vehicles |
OE replacement. Direct-fit heater control valve for straightforward installation.
Bypass style. Flow-control design routes coolant through a water control tee valve.
Plastic construction. Lightweight material with three hose connectors for the system.
Cross-references Four Seasons 74799, 5953 and 155390 for the same application. See all 15.
Four Seasons 74799 Heater Control Valve
The Four Seasons Control Valve 74799 is an OE replacement HVAC heater control valve built as a plastic water control tee valve with bypass flow control. It uses three hose connectors and 0.750 in. (19.050 mm) openings to regulate heater coolant flow in the climate control system.
Compatible with select Cadillac DeVille, Eldorado, Seville, Fleetwood, 60 Special, Commercial Chassis, and Fleetwood applications, this Four Seasons 74799 valve is a direct-fit service part for restoring heater circuit control. This part cross-references ACD155390 and H571 for the same application.
Key Features
- OE replacement heater valve for HVAC temperature control service
- Water control tee valve design with bypass flow control operation
- Plastic construction for heater hose routing and coolant flow management
- Three hose connectors for tee-style heater circuit layouts
- 0.750 in. / 19.050 mm openings
- Four Seasons Control Valve line, part number 74799
Product Details
The Four Seasons Control Valve line focuses on HVAC temperature control components used to manage coolant flow through the heater core circuit. Part number 74799 is a bypass-style heater valve that opens and closes coolant routing through the heater hoses, helping maintain proper cabin heat control in supported Cadillac applications. It is listed as an OE replacement and uses a tee-valve configuration with three hose connections.
Fits 1990-1995 Cadillac DeVille, N/A. Fits 1988-1995 Cadillac Eldorado, N/A. Fits 1988-1995 Cadillac Seville, N/A. Fits 1993 Cadillac 60 Special, N/A. Fits 1990-1993 Cadillac Commercial Chassis, N/A. Fits 1990-1993 Cadillac Fleetwood, N/A. Fits 1990-1992 Cadillac Fleetwood, N/A. Fits 1991-1992 Cadillac Fleetwood, N/A. Fits 1990 Cadillac Fleetwood, N/A. Fits 1993 Cadillac Fleetwood, N/A.
Common Replacement Uses
- Heater control valve leaking coolant at the HVAC circuit
- Loss of cabin heat due to restricted heater coolant flow
- Temperature control issues caused by a sticking bypass valve
- Cracked or aged plastic heater valve housing
- Service replacement for Cadillac heater hose tee-valve applications
Installation Notes and Tips
Verify hose size and connector layout before installation. Match the 0.750 in. openings to the existing heater hose routing and confirm the valve orientation matches the vehicle’s bypass-style plumbing. Inspect adjacent hoses and clamps for wear before returning the HVAC system to service.
Quality Assurance
Four Seasons supplies HVAC temperature control components for OE-style replacement service. Part number 74799 is built to match the listed heater valve application requirements for supported Cadillac models.
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1995 | Cadillac | DeVille | — | — | — | N/A | Control Valve |
| 1995 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1995 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1994 | Cadillac | DeVille | — | — | — | N/A | Control Valve |
| 1994 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1994 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1993 | Cadillac | 60 Special | — | — | — | N/A | Control Valve |
| 1993 | Cadillac | Commercial Chassis | — | 4.9L | V8 | N/A | Control Valve |
| 1993 | Cadillac | DeVille | — | — | — | N/A | Control Valve |
| 1993 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1993 | Cadillac | Fleetwood | Base | — | — | N/A | Tee Fitting; Control Valve |
| 1993 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1992 | Cadillac | Commercial Chassis | — | 4.9L | V8 | N/A | Control Valve |
| 1992 | Cadillac | DeVille | — | — | — | N/A | Control Valve |
| 1992 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1992 | Cadillac | Fleetwood | Base | — | — | N/A | Control Valve |
| 1992 | Cadillac | Fleetwood | Base | — | — | N/A | Control Valve; Tee Fitting; Control Valve |
| 1992 | Cadillac | Fleetwood | d'Elegance | — | — | N/A | Control Valve; Tee Fitting; Control Valve |
| 1992 | Cadillac | Fleetwood | 60 Special | — | — | N/A | Control Valve; Tee Fitting; Control Valve |
| 1992 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1991 | Cadillac | Commercial Chassis | — | — | — | N/A | Control Valve |
| 1991 | Cadillac | DeVille | — | — | — | N/A | Control Valve |
| 1991 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1991 | Cadillac | Fleetwood | Base | — | — | N/A | Control Valve |
| 1991 | Cadillac | Fleetwood | Base | — | — | N/A | Control Valve; Tee Fitting; Control Valve |
| 1991 | Cadillac | Fleetwood | d'Elegance | — | — | N/A | Control Valve; Tee Fitting; Control Valve |
| 1991 | Cadillac | Fleetwood | 60 Special | — | — | N/A | Control Valve; Tee Fitting; Control Valve |
| 1991 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1990 | Cadillac | Commercial Chassis | — | — | — | N/A | Control Valve |
| 1990 | Cadillac | DeVille | — | — | — | N/A | Control Valve |
| 1990 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1990 | Cadillac | Fleetwood | Base | — | — | N/A | Control Valve |
| 1990 | Cadillac | Fleetwood | Base | — | — | N/A | Tee Fitting; Control Valve |
| 1990 | Cadillac | Fleetwood | d'Elegance | — | — | N/A | Tee Fitting; Control Valve |
| 1990 | Cadillac | Fleetwood | 60 Special | — | — | N/A | Tee Fitting; Control Valve |
| 1990 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1989 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1989 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| 1988 | Cadillac | Eldorado | — | — | — | N/A | Control Valve |
| 1988 | Cadillac | Seville | — | — | — | N/A | Control Valve |
| No rows match your filter. | |||||||