How to Know When to Replace a Fan Thermostat

Hello, my name is Tom Burns a certified auto mechanic from Redding, Pennsylvania. Today we’re going to talk about how to know when to replace a fan thermostat. There’s either a thermostat that controls the flow through the engine or a coolant sensor that will turn on an electric fan. There are a couple of bolts, two-three hoses. It’s not too difficult to change as you see if you have an electric fan. It is computer controlled, it works off of a sensor, usually close to the thermostat housing or on the side of the radiator. You’ll have to check a repair manual to see where the location is or a competent part store locally can tell you what it looks like and show it to you.

They might even tell you where it is. For this particular vehicle, you will need a three-quarter socket and a ratchet extension. Disconnect your connector on it. Pull it right out. You might want to relieve the pressure in your radiator cap right here first. Make sure the engine is not hot before you start this process. Fill it out that you knew one screw right back in. Push connected back on. Fill it back up a corner to about 195 degrees, about 210 degrees. If it’s an electric fan, it will turn on under that and keep your hands away from the fan.

You don’t want to sit there trying to turn it thinking it does not work. When it heats up, it expands and locks that fan and starts turning it. So again, if you have a clutch fan, don’t put your hands in there cause you don’t know when it’s going to start turning. It will free spin until it gets up to temperature and it locks. Other than that, it’s really simple. You either have a manual fan or electric fan. It has a temperature sensor, works electronically through the computer. The thermostat is in this housing will simply change.