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Four Seasons 36478 Engine Cooling Fan Switch - Lower
Four Seasons 36478 Temperature Switch
The Four Seasons Temperature Switch 36478 is a radiator-mounted engine cooling fan switch built for temperature-based fan control. It uses a 3-terminal, female round connector with an M22 x 1.50 male thread for direct radiator mounting.
Compatible with 1997-2001 Cadillac Catera lower radiator-mounted applications, this switch helps manage cooling fan operation based on coolant temperature thresholds. Four Seasons 36478 meets or exceeds OEM requirements and is part of the Four Seasons Temperature Switch line.
Key Features
- Radiator mount temperature switch for engine cooling fan control
- 3-terminal configuration with brown round female connector
- M22 x 1.50 fitting thread for radiator-mounted installation
- Temperature on: 220 / 248
- Temperature off: 212 / 239
- Meets or exceeds OEM specifications
Product Details
Four Seasons 36478 is a temperature switch used in radiator-mounted cooling fan circuits to trigger fan operation at the specified temperature range and shut it back off as temperatures drop. The lower radiator-mounted design and 3-pin electrical layout make it a direct replacement for the listed application. This part cross-references A06815 and SW1423 for the same application.
Fits 1997-2001 Cadillac Catera, lower. Four Seasons 36478 is the correct search term for buyers looking for a radiator-mounted engine cooling fan switch for Cadillac Catera cooling system service.
Common Issues This Part Addresses
- Cooling fan not switching on at the proper temperature
- Cooling fan staying on longer than expected after warm-up
- Intermittent radiator fan operation caused by a failed temperature switch
- Temperature control faults in radiator-mounted fan circuits
- Replacement needs for a worn or inaccurate fan switch
Installation Notes
Verify the connector style, terminal count, and M22 x 1.50 thread before installation. Confirm the radiator-mounted location and lower position match the original part on the vehicle. Always compare the temperature on and off specifications to the removed switch before replacement.
Quality Assurance
Four Seasons 36478 is engineered as an OEM-style replacement and meets or exceeds OEM requirements for the listed application. Four Seasons Temperature Switch parts are built for direct-fit cooling system service where accurate fan control is required.
| Brand | Four Seasons |
|---|---|
| Part Number | 36478 |
| Position | Temperature Switch, Lower |
| Connector Color | Brown |
| Connector Gender | Female |
| Connector Shape | Round |
| Description | Switch-Temp /Radiator Mount |
| Fitting Gender | Male |
| Fitting Thread | M22x1.500 |
| Fitting Thread Size | M22 x 1.50 |
| Function | temperature switch |
| Meets / Exceeds OEM? | YES |
| Mnt Sys Loc | Radiator Mount |
| Style | Temperature |
| Temperature Off | 212 / 239 |
| Temperature On | 220 / 248 |
| Terminal Pin Qty. | 3 |
| Terminal Quantity | 3 |
| Type | Temperature |
This part fits 5 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2001 | Cadillac | Catera | Lower | Radiator Mounted Engine Cooling Fan Switch; Temperature Switch |
| 2000 | Cadillac | Catera | Lower | Radiator Mounted Engine Cooling Fan Switch; Temperature Switch |
| 1999 | Cadillac | Catera | Lower | Radiator Mounted Engine Cooling Fan Switch; Temperature Switch |
| 1998 | Cadillac | Catera | Lower | Radiator Mounted Engine Cooling Fan Switch; Temperature Switch |
| 1997 | Cadillac | Catera | Lower | Radiator Mounted Engine Cooling Fan Switch; Temperature 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.