Most cases 235 degrees Fahrenheit In addition one or more of the cooling fans will come on and run continuously when the A/C is running.
== == Cooling fans are designed to start at 235 degrees
mine kick on around 230 temp.
Whenever the AC is turned on, both cooling fans also come on. Otherwise, during normal operation only one fan comes on when activated to maintain correct engine temp.
they do for the ac they only come on when the engine temp is peaked about 210 deg
Check the thermal relay for the cooling fans.
engine cooling fan should not do this - bad temp sensor likely
In most engines the gauge and cooling fans have different senders, so if you have good hot air blowing inside the car from the heating system and the cooling fans on the radiator are operating, and still no gauge reading, you may have the wire disconnected from the temp. sender. The cooling fans can run after a car shuts down, as they are wired separate from the key on their own system, and will run until their sensor shuts them down.
check the fuses on top off the battery they may have blown..........or it may be a dodgy temp sensor....
I verified that the 2 coolant fans come on at low speed once coolant temp reaches 223/225 degrees I thought this was too high a temp so I checked with local Buick dealer. They claim 220-230 is still considered normal operating range. If you want to get cooling fans to come on earlier and at hi-speed just turn on A/C or defroster. With A/C on temp never seems to get above 205. If the engine isn't coming up to teperature, they will not engage. If they are not getting power due to a relay or wiring. If the computer is getting false information about the engine temperature (temp sensor?), they will not come on.
Yes most models actually already come with a cooling fans.
The cooling fans are controlled by the engine computer. It watches the coolant temp sensor, which is near the thermostat, to decide when to run the fans. Yhe computer acuates a realy to turn the fans on.
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.