You dont have a problem. Fans dont turn on until about 3/4 gauge. May turn on sooner with AC on.
Have you flushed the heater core?
flush the system and change thermostat,this should fix problem. I flushed mine and i changed coolant and thermostat,it is now fine.
have you flushed your radiator or changed the thermostat it could be stuck
Hi there, if you have flushed any engine and have changed thermostate there are only two options that are left; (providing that there are no leaks) 1. the thermostat is faulty / 2. your water pump is broken and needs to be replaced
water pump
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?"
Sounds like thermostat is not opening and needs replacing
it could be the thermostat needs to be changed or the heater core needs to be flushed out.these would be the cheaper things to try first.
How did you change the thermostat?
Check the temp sender and make sure the wiring is connected. How long has it been since the thermostat was changed and the coolant was flushed? You might try those...or at least a thermostat change. The coolant level is too low, and/or there is not enough water mixed with the coolant.
Test gauge function with a mechanical gauge to get actual engine temp.
Either the water pump impeller is loose on it's shaft, or you have a leaking head gasket.