Usually between 220 and 230 degrees.
The cooling fan comes on when the engine reaches a certain temperature and is controlled by a sensor switch that kicks the fan on when the temperature reaches the preset temp.
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?"
Usually 210-230 degrees F.
The cooling fans on a 99 Nissan Maxima will not come on if the coolant temperature sensor is defective. The fan only comes on when the temperature passes a threshold.
Cooling fan should come on either when coolant temperature reaches 235 degrees or the A/C or defroster is turned on
Cooling fan should come on when coolant temperature exceeds 235 degrees Fahrenheit or A/C or defroster are turned on
Check the temperature at the radiator when hot Cooling fan is designed to come on only when:A/C Compressor is on (either during cooling or defrosting) orwhen coolant temperature exceeds 235 degrees Fahrenheit
Cooling fan is designed to come on only when A/C, defrost, or engine temperature exceeds 235 degrees
Probably because either the fuse or circuit breaker or the temperature sensing switches have failed.
If by cooling system you mean the cooling fan, it takes a while for the coolant temperature to rise enough to trigger the temperature sensor that activates the fan. This is to help warm up the engine and to avoid unnecessary operation of the cooling fan when it is not needed.
The cooling fan will turn off when the temperature drops to normal temperature. When the temperature generated by the device does not cause damage to the device, or when the device is no longer in use, the cooling fan will be turned off.The above answer is provided by Suzhou Santian Precision Mould Manufacturing Co., Ltd.
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