My car's inside fan stays on even when off mode

depending on the engine temperature the fan is supposed to remain on after you turn the engine off, until the engine reaches a preset cooler temperature. when it reaches cooler temperature usually within 5 minutes or so it should cut off... if you cut it off and it is running 30 minutes later.. then there is a problem with the fan relay or temperature sending unit.

Sounds like a micro switch problem.
the relay is staying and saying on even when off. An electric program test should fix the problem. They are small diagnostic machines that plug into a socket either under the bonnet or in/near the glove box.

The fan speed relay has fused contacts keeping it in the high speed mode. It needs to be replaced.

your high speed fan relay contacts are stuck together that power the fan,normally the selectot switch on the dash controls power to the relay for on and off,but when the contacts weld themselves together you no have control over the fan speed even with the key off,its probably under the hood in a black box marked relays and fuses,remove the relays one at a time till it kills the fan,sometimes hitting the offending relay on the ground will break the contacts loose,but still replace it

if the fan switch is on the fan will still work,, turn off the fan switch and see if that stops the fan

TAKE RADIATOR CAP OFF WITH ENGINE COLD AND CHECK WATER ..MAKE SURE RADIATOR NOT BLOCKED,,PLASTIC BAG ETC. THIS SOUNDS LIKE LOW WATER OR RADIATOR ..STOPPED UP INSIDE ..IF YOU HAVE GOOD HEAT IT'S FULL OF WATER. REPLACE T STAT B4 RADIATOR..IT'S CHEAPER. ALSO CHECK FOR RADIATOR COOLING FAN OPPERATION..I,M RULING OUT THE WATER PUMP.

The power connection to the fan motor on these is known to overheat and cause a bad connection.The fan motor is above the passengers feet.Next time the fan motor will not come on, switch the selector to high and wack the bottom of the dash above the passengers feet.If the motor does come on at that time,you may need a replacement fan motor and connector.REPLACE the fan speed resistor board when replacing the fan motor,which is right behind the fan motor.

BLOWER FAN RELAY FAILURE

If the heater blower motor resistor failed then the heater will stay on full blast to keep your window clear, for safety. If the key is turned off and the fan still blows then I suspect you have an ignition switch problem. Main power comes from the key switch to feed the heater system. The plug at the ignition switch could be melted and making contact or an internal switch problem. The switch is located on the steering column under the plastic cover.Unplubbing the switch should help diagnos the problem.

HI Had same Problem. Found the door sensors had droped and not in correct possiation. the differance light stays out and functions properly. if the door sensors not on check degree the light stays on.