/live/media/FS/FS_20976_Fro.jpg)
OE Quality
60-Day Returns
Four Seasons 20976 HVAC Binary Switch
Four Seasons 20976 Pressure Switch
The Four Seasons 20976 pressure switch is a system-mounted HVAC binary switch built for pressure-based compressor control. It is a direct-fit style replacement for select Mazda Miata applications and is engineered to meet or exceed OEM requirements.
Key Features
- Binary HVAC pressure switch with open/closed operation
- System-mounted design with a male 3/8 in. x 24 fitting thread size
- Female special connector with 2 terminals
- Steel construction with white finish
- Operate pressure: 33 psi on, 30 psi off
- Meets or exceeds OEM specifications
Product Details
Four Seasons Pressure Switch 20976 is part of the brand’s pressure switch line for HVAC service and replacement. This binary pressure switch monitors system pressure and helps control compressor engagement based on the specified low-pressure thresholds. It is listed for 1990-1993 Mazda Miata models, making it a focused replacement choice for Mazda Miata HVAC pressure switch service. The Four Seasons 20976 part number is also referenced in aftermarket interchange listings for the same application.
Common Issues It May Address
- Compressor cycling caused by incorrect system pressure signal
- HVAC compressor not engaging when pressure is within range
- Compressor cutout related to a failed pressure switch
- Intermittent air conditioning operation on a Mazda Miata
- Fault codes or control issues tied to pressure switch failure
Installation Notes and Tips
Verify the connector shape, terminal count, and 3/8 in. x 24 fitting thread size before installation. Confirm the vehicle uses a system-mounted binary pressure switch and match the pressure operating points to the original component. For fitment, this part fits 1990-1993 Mazda Miata, N/A. Always inspect the HVAC system for leaks or contamination before replacing the switch.
Quality Assurance
This Four Seasons pressure switch is manufactured to meet or exceed OEM specifications for the listed application. Cross-reference part numbers include UAC SW11218C and Global Parts Distributors LLC 1711495.
| Brand | Four Seasons |
|---|---|
| Part Number | 20976 |
| Position | Pressure Switch |
| Color | White |
| Comp Open/Closed | Open |
| Connector Gender | Female |
| Connector Shape | Special |
| Description | Switch-Pressure /System Mount |
| Fitting Gender | Male |
| Fitting Thread Size | 3/8 in. x 24 |
| Item Included A Desc | 24606 |
| Item Included A Qty. | 1 |
| Material | Steel |
| Meets / Exceeds OEM? | YES |
| Mnt Sys Loc | System Mounted |
| Number of Terminals | 2 |
| Operate Psi Low Off | 30 |
| Operate Psi Low On | 33 |
| Style | Binary |
| Type | Pressure |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1993 | Mazda | Miata | N/A | Pressure Switch |
| 1992 | Mazda | Miata | N/A | Pressure Switch |
| 1991 | Mazda | Miata | N/A | Pressure Switch |
| 1990 | Mazda | Miata | N/A | 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.