What is a Thermo fan switch?

The thermo fan switch is designed to control operation of the electric thermo fan(s). The thermo fan switch responds to changes in engine coolant temperature, providing circuit switching during a predetermined temperature range allowing fan operation.

What is a thermostatic cooling fan?

The fans are controlled either with a thermostatic switch or by the engine computer, and they turn on when the temperature of the coolant goes above a set point. They turn back off when the temperature drops below that point. Rear-wheel drive cars with longitudinal engines usually have engine-driven cooling fans.

How does a fan temperature sensor work?

The tip of the CTS is probably located right next to the engine coolant. The sensor works by measuring the temperature that’s being given off by the thermostat and/or the coolant itself. The temperature is then sent to the on-board control system.

Where should a Thermo fan switch be placed?

As long as the fan switch is as close to the thermostat as possible, in the manifold by the tstat, in the thermostat housing or in the radiator you’ll be fine. I would install the temp gauge sender as close to the thermostat as I can get it. In the manifold or the thermostat housing would be great.

Where is the thermo cooling fan switch located?

The cooling fan switch should be located near the thermostat housing on the left side of the engine, behind the distributor assembly.

Does thermostat control radiator fan?

The thermostat opens and closes when there is a need to. How it works is simple. When the temperatures outside are cold the thermostat stays closed and the coolant stays in the engine. When the coolant reaches the working temperature the thermostat opens and the coolant circulates through the cooling system.

What are the 10 common causes of overheating?

Common reasons for overheating engines

  • Too little or no coolant. Driving without proper levels of coolant/antifreeze may cause a coolant system failure.
  • Cooling system leaks.
  • A broken water pump.
  • Radiator issues.
  • Oil too low.
  • Thermostat failure.
  • Issues with the belts and hoses.
  • Heater core is plugged up.