Keep the cooling fan cycling on cue with the Standard Ignition Engine Cooling Fan Switch (Coolant Fan Switch), MPN TS-148. This thermal switch senses coolant temperature and, at its specified set point, makes electrical contact to send the signal that triggers the fan controller — helping the cooling system respond when the engine reaches operating temperature. It drops in as a direct-fit replacement for the listed applications: the 1985-1986 Nissan Maxima, 1987-1989 Nissan Pulsar NX, 1986-1988 Nissan Sentra, and 1986-1988 Nissan Tsuru. See the Buyer's Guide tab for full engine-level fitment.
- Calibrated actuation: Every unit is factory-calibrated and tested to make electrical contact at its specified lower-temperature set point.
- Custom wax formulation: The wax expands when heated to drive a snap-action electrical contact that transfers the signal to the fan controller.
- Bimetallic contact arm: A formed bimetal arm uses the differing expansion rates of two fused metals for precise, creep-action performance.
- Built for the job: Robust design and high-grade materials meet the demands of today's service professional.
If a failed coolant fan switch is the cause of an overheating engine or a fan that won't cycle, this replaces it.
Interchange: 17-1087
TFS545 · 8439 · SW537 · FS147 · 2159516E00 · 2159538E00 · 2159560A00 · 171087
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the TS-148 coolant fan switch do?
It senses coolant temperature and, at its calibrated set point, makes electrical contact to signal the fan controller so the cooling fan cycles as the engine reaches operating temperature.
Which vehicles does this switch fit?
It's a direct-fit replacement for the 1985-1986 Nissan Maxima, 1987-1989 Nissan Pulsar NX, 1986-1988 Nissan Sentra, and 1986-1988 Nissan Tsuru. Check the Buyer's Guide tab to confirm your vehicle.
How does the switch actuate?
A custom wax pellet expands when heated to drive a snap-action contact, while a formed bimetallic contact arm uses two fused metals' expansion rates for precise, creep-action performance.
What are signs this switch may need replacing?
Signs may include an engine that overheats or a cooling fan that won't turn on at temperature. Diagnose the cause first, since other components can produce the same symptoms.
What numbers does the TS-148 interchange with?
It cross-references 17-1087, TFS545, 8439, SW537, FS147, 2159516E00, 2159538E00, and 2159560A00 (also written 171087).
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