Keep your engine cooling fan cycling on schedule with the Standard Ignition switch — the Engine Cooling Fan Switch (Coolant Fan Switch), MPN TS-309. It drops in as a direct-fit replacement for the 1984 Mazda 626, and works as a thermal switch that senses coolant temperature and makes electrical contact at a specified set point to signal the fan controller. If a failed fan switch is the cause of a cooling fan that won't run — or one that never shuts off — this replaces it.
Backed by complete quality control from componentry through the finished product. See the Buyer's Guide tab to confirm the engine and application for your vehicle.
Interchange: TFS557 · SW1630 · FS208 · RF0318840
This part cross-references / interchanges with the following part numbers:
What does this coolant fan switch do?
It's a thermal switch that senses coolant temperature and closes its electrical contact at a specified set point, signaling the fan controller to run the engine cooling fan.
What vehicle does the TS-309 fit?
It's a direct-fit replacement for the 1984 Mazda 626. Check the Buyer's Guide tab to confirm the engine and application for your vehicle.
What numbers does this switch interchange with?
It replaces TFS557, SW1630, FS208 and RF0318840.
What are signs this switch may need replacing?
A cooling fan that won't turn on as the engine warms up, or one that runs constantly, can be signs the switch has failed. Other causes are possible, so diagnose before replacing.
Is this switch calibrated before it ships?
Yes. Every unit is factory-calibrated and tested to confirm it actuates at its specified temperature set point.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
