Standard Ignition TS-542 Engine Cooling Fan Switch

Engine Cooling Fan Switch for Mercedes-Benz

Standard Ignition TS-542 is an engine cooling fan switch built with a metal housing, a round plug-in connector, and a 14mm x 1.50 thread size. It is calibrated to trigger at a specified lower-temperature set point, helping control fan operation on select Mercedes-Benz 190E applications.

Key Features

• Engine cooling fan switch with factory-calibrated actuation
• Formed bimetal contact arm for precise electrical switching
• Wax-based thermal element expands with heat to activate the contact
• Plug-in attachment method with round male connector
• 12-volt design with 2-pin terminal layout
• Metal housing with red and gold finish
• Open at idle configuration
• Thread size: 14MM x 1.50

Detailed Description

Standard Ignition TS-542 is engineered for temperature-based fan control in vehicles that use a threaded thermal switch. The internal wax pellet and bimetal contact design are calibrated and tested during production to confirm actuation at the specified temperature, supporting consistent fan controller signaling. This part cross-references Four Seasons 36562 for the same application. Fits 1987 Mercedes-Benz 190E, N/A; fits 1988 Mercedes-Benz 190E, N/A; fits 1991-1993 Mercedes-Benz 190E, N/A. For Mercedes-Benz 190E cooling system service, TS-542 provides a direct replacement format with the correct connector style and thread specification.

Common Problems It Can Address

• Cooling fan not switching on at the proper temperature
• Fan cycling inconsistently due to a worn thermal switch
• Overheating caused by delayed fan activation
• Faulty temperature signal transfer to the fan controller
• Intermittent cooling fan operation on threaded switch applications

Installation Notes and Tips

Verify the thread size, connector shape, and terminal layout before installation. Use the correct sealing method for the cooling system design and inspect the connector for corrosion or looseness. Confirm the replacement matches the vehicle’s temperature-control specification before returning the system to service. Fits 1987 Mercedes-Benz 190E, N/A; fits 1988 Mercedes-Benz 190E, N/A; fits 1991-1993 Mercedes-Benz 190E, N/A.

Quality Assurance

Standard Ignition manufactures this switch with complete quality control from component selection through final testing. Each unit is calibrated and checked to confirm electrical contact at the specified temperature, supporting consistent performance in service.