Get a Bigger Radiator
When 1990 Honda is running cooling fan does not come on but comes on when engine is off and I thermostat and temperature switch changed?"
stop an engine
Your temperature would usually fluctuate. But if your car has over heated then there is a chance it may need changing
I have a 2001 Dodge 3500 that was not getting up to operating temperature. I changed the thermostat and that fixed it. I guess the thermostat was stuck open.
Depending on the engine, the coolant temperature in a Cadillac could be from 180 to 195 degrees. The thermostat can be changed to give a lower or higher temp reading.
have you changed the battery in the thermostat?
You most definately unpluged the sensor wire. It's a single red wired that plugs onto a sensor just passed the thermostat.
You may have the thermostat in backwards. The spring side of the thermostat faces into the engine.
No
Probably thermostat sticking open , quite common , had mine changed for the same reason - (Helpfull)
it is a hyndai that's why it is a hyndai that's why
The thermostat is not opening up enough,