🔥 Painless Performance 30111 Auto Thermostatic Switch - 185 Degrees On/175 Degrees Off with Adapter Review

All the cars in my project get an electric fan instead of a mechanical one to minimize wear on the water pump pulleys and power loss due to the mechanical fan loading the engine. These thermal closers are an integral part of ease of installation and reliability.

Addition to my review. The switch works fine, I found another problem. I would recommend this sensor. That doesn't work with my engine. My fans wouldn't turn on so checked that the switch was ok. The problem was that the adapter covered the sensor too much from the refrigerant flow. This sensor should be longer

Accidentally ordered the wrong size but finding the 1/8 NPT fan switch is a nightmare. I decided to use a larger thread in the coolant adapter, soldered the pigtail, it works fine. still easily manages two Mishimoto electric fans on my ae86. The temperature was off by a few degrees, but only one gauge was used to check, no cross calibration. In any case, the car remains nice and cool so far.

I have a 1998 Jeep Grand Cherokee 5.9 Limited. It came from the factory with an electric fan controlled by two thermal switches, one on each radiator hose, to turn the fan on at low and high speeds. Unfortunately, Jeep has discontinued all parts of this system, including the switches, and they are not available in the aftermarket. It requires a small modification to the wiring as the connector is different, but otherwise it is a direct replacement. In 2015 I tried the Derale switches in each…