Coolant overheat light on. Fan does not run

[Robert B]

Coleman 400 Anyone know the location of the fan 75 degree C temperature control switch. Would like to check for power or jumper it to see if fan comes on. Thanks

 

[Robert B]

Found switch at back side of radiator, driver side. Jumpered it fan runs, guess I need a new switch.

[aefron88]

It's also possible you have an air pocket in the coolant causing the switch not to heat up enough. Did you burp to confirm? These things are prone to air pockets when filling and ive read a number of people having air in the shstem from the factory.

There's a small burping port on where the coolant goes into the engine.

[Joe Breaux]

a leaking head gasket will put air into coolant as well.  Hisun engines are known for head gasket failure.... while its running hot, look at coolant recovery bottle.. if you see tiny bumbles rising, its a head gasket leak.. hopefully its just your sender. you can jump it to run continuously til you can replace it

[Robert B]

Thanks Joe. I ordered a toggle switch so I can turn it on and off. Will check to see if I have bubbles. Engine was under hi load I was pulling a gravel driveway grader.

[Joe Breaux]

that works too.. dont let them overheat.. serious damage will occur. I m sure you know already . but dont pull anything in High gear