The cooling fan is activated by a sensor, and possibly a relay. Most likely the sensor has gone bad.
check you tep sencer and youir fan relay drive safe
The cooling fan is coming on cooling the engine. Very normal.
Check the relays and fuses.
Sounds like the thermal relay is defective.
Faulty radiator cooling fan switch or circuit; Worn or damaged cooling fan motor or circuit; Broken, missing, or defective fan blade(s); Incorrect operation information being delivered and sent from the EEC (ENGINE CONTROL COMPUTER).
check fan relay in fuse box under hood.
cooling fan
I had a problem with the cooling fans not coming on when the car was at rest.... so when i would stop at lights the temp would start rising... i ended up working out you can override the faulty circuit by turning on your a/c when you pull up and that overrides it and they turn on and no more over heating..
In the 1992 Lexus ES300 there is only one cooling fan. The cooling fan is operated hydraulically by fluid from the power steering reservoir. If there is a leak in the fluid pipe the fan can stop working and the car will over heat in traffic, otherwise it is fine. In any case the fan MUST always run when the A/C is switched on. Check for leaks in the rubber hose leading to the cooling fan from the hydraulic fluid reservoir.
The most notable fan used for both heating and cooling would probably be of the Dyson brand. They have a product called the Dyson Hot+Cold, which is a bladeless heater fan used for both cooling and heating.
The cooling fan at the radiator is not coming on. Running the heater take heat out of the coolant as it goes through the heater.