🌡️ Enhance Cooling Efficiency with Derale 18748 180° Thermo Switch for Electric Fan Review

Installed but the sensor does not work. The car reached 215⁰ without shifting. Connected to relay and circuit breaker.

A relay to switch on the fans is already present, you only need a thermal switch to operate it, it is well fixed and works as intended.

Easy to install. Connected to ground wire and works great. People who have problems with them melting or burning out connect them to the power cord.

Works great. Hook it up to the fan relay ground wire and it will last a lot longer than if you tried to pass full positive amps through it. It barely fits in the radiator core of my 2003 Ram.

Good price, good product. Used it on a vintage Mustang with an electric fan. It works best in conjunction with a relay, but works fine without.

Not impressed, especially for the price. I tried using 2 of these, one for each fan. These switches activated relays that operated the fans. The first two did not switch even at temperatures up to 225°F (measured with an infrared thermometer). After replacing it with Revain, one of the new switches works at 220°F and the other still doesn't work at all. After reading other reviews I expected them to be later but I don't trust these at all.