Standard Ignition Engine Cooling Fan Switch TS-451
Standard Ignition Engine Cooling Fan Switch TS-451 - view 2
Standard Ignition Engine Cooling Fan Switch TS-451 - view 3
Standard Ignition Engine Cooling Fan Switch TS-451
Standard Ignition Engine Cooling Fan Switch TS-451 - view 2
Standard Ignition Engine Cooling Fan Switch TS-451 - view 3

Standard Ignition Engine Cooling Fan Switch P/N:TS-451

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$47.99
MPN: TS-451
Item Package Quantity: 1
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Standard Ignition Engine Cooling Fan Switch P/N:TS-451
Standard Ignition Engine Cooling Fan Switch P/N:TS-451
$47.99

Keep the radiator fan cycling on cue with the Standard Ignition Engine Cooling Fan Switch TS-451 — the Maxima switch that installs as a direct-fit replacement for the 1984 Nissan Maxima and a wide range of Mercedes-Benz models. It senses coolant temperature and, at its calibrated set point, completes the circuit that signals the fan controller to run the engine cooling fan.

Features:

  • Temperature-calibrated actuation: custom wax formulations expand when heated to trigger a snap-action electrical contact that transfers the signal to the fan controller.
  • Factory-tested set point: every thermal switch is calibrated and tested to confirm actuation at its specified lower-temperature set point.
  • Bimetallic creep-action contact: a formed bimetallic contact arm uses the differing expansion rates of two fused metals for precise performance.
  • Built for service demands: robust design and high-grade materials from a global OE ignition manufacturer.

If a failed cooling fan switch is the cause of a fan that won't turn on or an engine that runs hot, this replaces it. Fits Mercedes-Benz models including the 1984-1986 190D, 1978-1985 300CD, 1975-1981 300D, 1973-1980 450SEL and 450SL, plus the 1984 Nissan Maxima — see the Buyer's Guide tab for the full list.

Interchange: TFS610 · SW4902 · FS253 · 0065451424 · 0065453924

This part cross-references / interchanges with the following part numbers:

TFS610, SW4902, FS253, 0065451424, 0065453924, TS-451

Frequently Asked Questions

Does this fit the 1984 Nissan Maxima?

Yes — the TS-451 is listed for the 1984 Nissan Maxima, along with many Mercedes-Benz models. Check the Buyer's Guide tab to confirm your exact vehicle.

What does the engine cooling fan switch do?

It senses coolant temperature and closes an electrical contact at its calibrated set point, signaling the fan controller to run the engine cooling fan.

What are signs this switch may need replacing?

A cooling fan that won't turn on, an engine that runs hotter than normal, or a fan that runs constantly can be signs — diagnose the cause before replacing.

How does the switch activate?

Custom-formed wax expands when heated to trigger a snap-action contact, and a formed bimetallic contact arm provides creep-action movement for precise actuation at the set temperature.

What other part numbers does this replace?

It cross-references TFS610, SW4902, FS253, 0065451424 and 0065453924.

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