Standard Import Engine Cooling Fan Switch P/N:TS-257
$72.99
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Keep the electric cooling fan cycling on at the right coolant temperature with the Standard Ignition Engine Cooling Fan Switch TS-257 (also written TS257). It drops in as a direct-fit replacement for the 1975-1980 MG MGB, threading into the cooling system to sense coolant temperature and signal the fan controller when the fan needs to run.
Temperature-actuated switching: a custom wax formulation expands when heated to trigger a snap-action electrical contact, transferring the signal on to the fan controller.
Calibrated set point: the wax pellet is custom-formed for its temperature range, and every unit is factory-calibrated and tested to confirm actuation at the specified lower-temperature set point.
Bimetallic contact design: built with a formed bimetallic contact arm that moves on the differing expansion rates of two fused metals for precise, creep-action performance.
Built for service: robust design and high-grade materials from a global manufacturer of original-equipment ignition products, with quality control maintained throughout production.
If a failed cooling fan switch is the cause of a fan that won't turn on or an overheating engine, this replaces it; diagnose the circuit first, since those symptoms can have other causes.
Interchange: TFS575 · SW595 · FS233 · URP1126
This part cross-references / interchanges with the following part numbers:
TFS575, SW595, FS233, URP1126, TS-257
Frequently Asked Questions
What does this cooling fan switch do?
It senses coolant temperature and closes an electrical contact at its calibrated set point, signaling the fan controller to switch the electric cooling fan on.
Which vehicle does the TS-257 fit?
It is a direct-fit replacement for the 1975-1980 MG MGB. Check the Buyer's Guide tab to confirm it matches your vehicle.
How does the switch activate?
A custom wax formulation expands when heated to trigger a snap-action contact, while a formed bimetallic contact arm provides precise creep-action movement.
What are signs this switch may need replacing?
A cooling fan that won't turn on, or an engine that runs hot, can indicate a faulty switch. Diagnose the circuit first, as these symptoms can have other causes.
What numbers does this part interchange with?
It cross-references TFS575, SW595, FS233, and URP1126.
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STANDARD MOTOR PRODUCTS
Standard Import Engine Cooling Fan Switch P/N:TS-257
Keep the electric cooling fan cycling on cue with the Standard Ignition Engine Cooling Fan Switch / Engine Cooling Fan Temperature Switch, MPN TS-412 (also written TS412). This coolant fan switch...
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.
