Standard Ignition Engine Cooling Fan Switch TS-127
Standard Ignition Engine Cooling Fan Switch TS-127 - view 2
Standard Ignition Engine Cooling Fan Switch TS-127 - view 3
Standard Ignition Engine Cooling Fan Switch TS-127
Standard Ignition Engine Cooling Fan Switch TS-127 - view 2
Standard Ignition Engine Cooling Fan Switch TS-127 - view 3

Standard Ignition Engine Cooling Fan Switch P/N:TS-127

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$45.99
MPN: TS-127
Item Package Quantity: 1
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Standard Ignition Engine Cooling Fan Switch P/N:TS-127
Standard Ignition Engine Cooling Fan Switch P/N:TS-127
$45.99

Keep your cooling fan cycling on at the right temperature with the Standard Ignition switch TS-127, a coolant fan switch that senses engine coolant temperature and signals the fan controller when the set point is reached. It's a direct-fit replacement for the 1985-1989 Nissan Maxima, 1986-1989 Nissan Stanza, and 1985-1986 Porsche 928 — see the Buyer's Guide tab for engine specifics.

  • Temperature-triggered actuation: a custom wax formulation expands when heated to drive a snap-action electrical contact, transferring the signal to the fan controller.
  • Factory-calibrated set point: every unit is calibrated and tested to confirm switch actuation at its specified lower-temperature set point.
  • Bimetallic contact arm: built with a formed bimetallic arm whose two fused metals move at different expansion rates — a creep-action device for precise performance.
  • Robust build: high-grade materials and quality control from componentry to finished product.

If a failed fan switch is the cause of an overheating engine or a fan that won't cycle, this replaces it; diagnose the cooling system first. A common fit for the Maxima switch and Porsche 928 switch applications listed above.

Interchange: 17-1077
171077 · TFS533 · 8436 · SW526 · FS157 · 19021001 · 2159501E00

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

TFS533, 8436, SW526, FS157, 19021001, 17-1077, 2159501E00, TS-127

Frequently Asked Questions

What does the TS-127 coolant fan switch do?

It senses engine coolant temperature and, when its calibrated set point is reached, closes a snap-action electrical contact to signal the fan controller to run the cooling fan.

Does it fit my Nissan Maxima?

Yes, it's a direct-fit replacement for the 1985-1989 Nissan Maxima, plus the 1986-1989 Nissan Stanza and 1985-1986 Porsche 928. Check the Buyer's Guide tab to confirm your vehicle.

How is the switch actuated?

A custom wax formulation expands when heated to drive a snap-action contact, and a formed bimetallic arm uses two fused metals with different expansion rates as a creep-action device for precise performance.

What are signs this switch may need replacing?

A cooling fan that won't turn on, runs constantly, or an engine that overheats can point to a failed fan switch. Diagnose the cooling system first, since these symptoms have other causes.

Is the switch calibrated?

Yes. Every unit is factory-calibrated and tested to confirm actuation at its specified lower-temperature set point.

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