Keep the radiator fan cycling on cue with the Standard Ignition Engine Cooling Fan Switch (P/N TS-179). This thermal switch drops in as a direct-fit replacement for the 1987-1988 Chevrolet Sprint, 1987-1988 Pontiac Firefly, and 1987-1988 Suzuki Forsa — see the Buyer's Guide tab for the full application details. It senses coolant temperature and sends the electrical signal that tells the fan controller when to run the cooling fan. If a failed cooling fan switch is the cause of a fan that won't switch on or an engine that runs hot, this replaces it.
- Calibrated wax-pellet actuation: custom wax formulations expand when heated to trigger a snap-action electrical contact and transfer the signal to the fan controller.
- Factory-tested set point: wax pellets are custom-formed for the specified temperature range, and every unit is calibrated and tested to confirm switch actuation at its lower-temperature set point.
- Bimetallic contact arm: a formed bimetal contact uses the different expansion rates of two fused metals for precise, creep-action performance.
- Built for the trade: robust design and high-grade materials from a global OE ignition manufacturer with in-house quality control.
Interchange: 89057820 · TFS9 · SW562 · FS114 · 96055554 · 1768082001
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this cooling fan switch do?
It senses coolant temperature and completes the electrical circuit that signals the fan controller to run the engine cooling fan at the switch's specified temperature set point.
Which vehicles does the TS-179 fit?
It's a direct-fit replacement for the 1987-1988 Chevrolet Sprint, 1987-1988 Pontiac Firefly, and 1987-1988 Suzuki Forsa. Check the Buyer's Guide tab to confirm your vehicle.
How does the switch activate the fan?
A custom wax pellet expands when heated to trigger a snap-action contact, and a formed bimetallic arm uses two fused metals' expansion rates for precise creep-action performance.
What are signs this switch may need replacing?
A cooling fan that won't turn on, runs constantly, or an engine that runs hotter than normal can be signs this switch may need replacing. Diagnose the cause before replacing.
What numbers does this part interchange with?
It cross-references 89057820, TFS9, SW562, FS114, 96055554, and 1768082001.
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