Having problems with your Volvo 940 ?
Is the thermal switch the same as the thermostat?
The thermo switch acts LIKE a thermostat in a way. It is sensitive to heat, and will open and close with temperature. The Fan switch (Thermo switch), will cause the electrical circuit to connect and disconnect at certain radiator temps to activate the cooling fan,thus cooling the engine coolant/antifreeze that runs through the radiator, then back into the engine. The thermostat is an engine component that reacts to heat also, but has no electrical wires running to or from it, the internal engine heat is what causes it to open and close.
Repair Help & Product Troubleshooting for Volvo 940
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