Standard Ignition TS-155 Engine Cooling Fan Switch

Engine Cooling Fan Switch for Ford and Mercury

Standard Ignition TS-155 is an engine cooling fan switch built for precise fan control in older Ford and Mercury applications. It uses a calibrated thermal design with a formed bimetal contact arm to trigger electrical contact at the specified temperature.

Key Features

• Engine cooling fan switch with 2 blade-style male terminals
• Thermal actuation uses a wax-based and bimetal contact design for consistent switching
• Factory-calibrated and tested to confirm actuation at the specified lower-temperature set point
• Built with high-grade materials for service use
• Standard Ignition TS-155 for direct replacement service

Detailed Description

The Standard Ignition TS-155 is an engine cooling fan switch designed to transfer the electrical signal to the fan controller when coolant temperature reaches the calibrated threshold. Its thermal construction uses custom wax formulations and a formed bimetallic contact arm to deliver controlled snap-action switching. This makes it a practical replacement for vehicles that rely on accurate fan engagement to manage engine temperature. Fits 1984-1990 Ford Escort, N/A; Fits 1984-1987 Mercury Lynx, N/A; Fits 1984-1986 Ford Tempo, N/A; Fits 1985-1986 Mercury Cougar, N/A, Engine Mounted; Fits 1984-1986 Mercury Topaz, N/A; Fits 1984-1985 Ford Mustang, N/A, Engine Mounted. This part cross-references Four Seasons 35936 for the same application.

What It Helps Fix

• Cooling fan that does not switch on at the correct temperature
• Fan cycling that occurs too early or too late
• Temperature control issues caused by a worn thermal switch
• Intermittent fan operation from degraded switch contacts
• Overheating concerns related to poor fan command signal

Installation Notes and Tips

Verify the terminal style before installation: TS-155 uses a 2-terminal, male blade connection. Match the replacement to the original switch temperature specification and mounting location, especially on engine-mounted Ford Mustang and Mercury Cougar applications. Confirm connector condition and inspect the cooling system before replacing the switch.

Quality Assurance

Standard Ignition manufactures this switch with complete quality control from component selection through final testing. Each unit is calibrated and tested to confirm actuation at the specified temperature.