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Four Seasons 36679 HVAC Cut-Off Switch
Four Seasons 36679 Pressure Switch Overview
The Four Seasons Pressure Switch 36679 is a system-mounted HVAC cut-off switch built for low-pressure A/C control. It uses a black plastic and metal housing, a female oval connector, and an M12 x 1.50 female fitting for direct service replacement on the HVAC system.
Compatible With Cadillac Eldorado, DeVille, and Seville, plus Oldsmobile Aurora applications, this pressure switch is specified as an open-contact, low cut-out design that meets or exceeds OEM requirements. The Four Seasons Pressure Switch line focuses on accurate HVAC pressure control for vehicles that rely on precise compressor protection.
Key Features
- Four Seasons Pressure Switch part number 36679
- HVAC cut-off switch with low cut-out pressure operation
- Open-contact design with 2 terminals
- Female oval connector and female M12 x 1.50 fitting
- System-mounted configuration for HVAC service replacement
- Black plastic and metal construction
- Meets or exceeds OEM specifications
Detailed Product Description
This pressure switch monitors low-side A/C system pressure and opens the circuit at the specified low-off point to help protect the compressor and maintain proper HVAC operation. It is a direct-fit style pressure switch for vehicles using a system-mounted low pressure A/C cut-off switch, including 1994-2002 Cadillac Eldorado, 1994-2000 Cadillac DeVille, 1995-1999 Oldsmobile Aurora, and 1994-1997 Cadillac Seville. The Four Seasons 36679 is a practical replacement when the original switch no longer responds correctly to refrigerant pressure changes.
This part cross-references UAC SW11158C for the same application.
What It Helps Address
- A/C compressor cycling caused by a faulty low-pressure switch
- Compressor shutdown from inaccurate pressure sensing
- HVAC system interruptions related to worn electrical contacts
- Low-side pressure cut-off issues on system-mounted switch setups
- Replacement needs for Cadillac Eldorado, DeVille, Seville, and Oldsmobile Aurora HVAC systems
Installation Notes and Tips
Install the switch on the HVAC system at the original mounting location and verify the connector style, thread size, and terminal count before installation. Confirm refrigerant charge and inspect the surrounding A/C circuit for leaks or wiring damage, since pressure switch faults can be caused by system conditions as well as switch wear. Use the vehicle service information for the correct diagnostic and replacement procedure.
Quality Assurance
Four Seasons lists this pressure switch as meeting or exceeding OEM requirements, making it a specification-based replacement for factory-style HVAC service.
| Brand | Four Seasons |
|---|---|
| Part Number | 36679 |
| Position | Pressure Switch |
| Color | Black |
| Comp Open/Closed | Open |
| Connector Gender | Female |
| Connector Shape | Oval |
| Description | Switch-Pressure /System Mount |
| Fitting Gender | Female |
| Fitting Thread Size | M12 x 1.50 |
| Item Included A Desc | 24676 |
| Item Included A Qty. | 1 |
| Material | Plastic / Metal |
| Meets / Exceeds OEM? | YES |
| Mnt Sys Loc | System Mounted |
| Number of Terminals | 2 |
| Operate Psi Low Off | 12 |
| Operate Psi Low On | 23 |
| Style | Pressure |
| Type | Low Cut-Out |
This part fits 25 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2002 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 2001 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 2000 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 2000 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1999 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1999 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1999 | Oldsmobile | Aurora | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1998 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1998 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1998 | Oldsmobile | Aurora | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1997 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1997 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1997 | Cadillac | Seville | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1997 | Oldsmobile | Aurora | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1996 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1996 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1996 | Cadillac | Seville | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1996 | Oldsmobile | Aurora | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1995 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1995 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1995 | Cadillac | Seville | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1995 | Oldsmobile | Aurora | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1994 | Cadillac | DeVille | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1994 | Cadillac | Eldorado | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
| 1994 | Cadillac | Seville | N/A | Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.