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Need to change fan motor, it may have been blocked by something, but the motor has burnt out. This is a difficult job, and the wiring near the fan may also be burnt, more difficult. I would sell the car.
Don't go there just yet ! Most heater motor speed problems relate to the heater resistor ! It's located in the ducting close to the motor assy and usually has 4/5 wires on to it and a 2 screw fixing. This componant must be cooled (hence air duct location) and is solely responsible for motor speeds ! You can check motor fan by test lamp/meter ! Good Luck
probley the restor that gives the a/c heater fan motor its power for the low/ medeam speds has gone bad and onley letes it run on high speed because it gives the fan motor full battery voltage on high speed. it should be located in the heater box were the fan will blow air across it to cool it when it is in use GEORGE STIRBER DBA AUTO ENGINEERING
You need to replace the fan spped chip located under the hood....If you look under the hood at the blower motor, you will see the power plug for it. Follow the wires down to the chip board they run into That is your problem area.....power chanels 1,2, & 3 are burned out pull the 2 bolts and remove the board, replace with a new one...You can buy used if you like but odds are they'll have an issue with them too. Real easy fix.
I suspect you also checked the fuses, some vehicles are double protected, especially since you usually have to remove the entire dash panel to get to the heater fan blower motor. It should be in the middle or under the glove box, should be located in a plastic box that has like a bell shape to where the motor is. check fuses then check wiring, and make absolutely certain the relay was the correct one that you changed, in a 3 year old vehicle the fan motor should not be bad yet.
Mine use to work on high only. It was the switch cylinders, something like that. It was an easy fix. Now my blower motor works intermittently. If I kick it, it turns back on. It is located on the passenger side close to the door side directly above your feet (below the jockey box). Kick straight up. If you need to replace it it is also an easy do-it-yourself repair. Make sure before you go out and replace your blower motor that you check your switch. A lot of repair shops will replace the motor w/o checking the switch, you end up paying for 2 repairs. You can make sure it's not the switch by jumping (bypassing) the switch.You apply jumper wires (not cables) directly to the motor, if the motor turns on you know it's the switch.
The heater fan resistor has failed. This is the device that controls the voltage to the fan motor, on the 3 lower speds, The resistor is bypassed when HIGH is selected. It is located under the dash, passenger side, on the box between the heater fan blower housing and the main heater box at the center. Held in by 2 phillips screws. Easy to change.Hope this helps, and Thanks for choosing FixYa. Please feel free to comment back if you have any other questions.
too simple .....3tings the motor bruchs when gets hot loose contact to the rotor and the fan stop working solution ; change the motor 2 the speed regulator mouted on the fan case is ba d change it 3 the heater suitch chek it too nicolas......