Question about 2002 Jeep Grand Cherokee

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Heater not blowing

Heater blower motor is not operating

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Check blower motor with 12volt battery ,if motor test OK heat resister

Posted on Feb 03, 2013

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A friend replaced my Heater Core for me and it still does Not blow Hot Air ...can you give me some trouble shooting ideas to check ?


Does the heater blower motor work? That is what blows cool air across and around the heater core and then through the case and out the vents as warm air blowing. The heater motor wiring circuit is separate, and gets pretty complicated with electronic HVAC controls, but it does have fuses.
If the blower motor works but you only get cold air, not warm, out the vents, then you have a problem with the heater case doors not operating properly. yes, the old temperature blend door problem, the actuator motors or the vacuum servos not operating the doors. By the time you get all that figured out and working again, you will be an HVAC expert in your own right. Your turn for a comment...what model and year of car anyway, are we talking about?

Feb 21, 2016 | Cars & Trucks

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I have a 99 plymouth voyager...when car is warmed uo the only way to get heat out of the heater is to leave the blower off for about 15 minures and then it will work...if i start the car with the blower on...


it will blow cold air until it reaches operating temperature dont understand what you want it to do it wont blow hot air right away notr made to do that

Dec 17, 2014 | 1999 Plymouth Voyager

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How can i fix the heat to blow hot air in my 1996 ford econoline250 cargo van


so either the blower motor isn't blowing or its just blowing cold air-always start with fuses-then check for 12v at the blower motor-use a volt ohm meter- if you have 12v then the blower motor is bad-if there is no warm air blowing out-look for the water valve that lets the hot water into the heater core-its on the small hose going back to the heater core-make sure its operating-cheers Denny

Nov 30, 2013 | Ford E-250 Cars & Trucks

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A/C Heater Blower Motor for 2010 Nissan Altima, was making a noise for a few weeks and then just stopped blowing.


sounds like a mouse attack to me. mice get into the heater vents and blower motor cage and make nests. those can throw your blower motor out of balance, thus resulting in the noise and then the motor just gets jammed and stops operation. but it could be just the blower motor failure it self. have it checked.

Jun 28, 2013 | 2010 Nissan Altima 2.5

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2001 nissan maxima heater blower isnt blowing


Check the fuse for the blower motor. If its okay, check for power at the heater motor. If you have power, and no blow, the blower motor will need to be replaced.

Dec 19, 2011 | Cars & Trucks

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Everytime i turn my heater on heater on works and blows fuse?


fuse blows. unplug heater blower motor turn ignition on, turn heater on, does fuse blow? if not need to replace heater blower motor

Feb 10, 2010 | 1995 GMC Jimmy

1 Answer

Heater fan on 2002 Yukon does not operate in front, only rear.


The front blower motor is controlled by the blower resistor module.This is usually the problem with the front blower not working.I looked up the schecmatics and I don`t see separate fuses for the front and rear.But the fuse for the front blower is in the under hood fuse block.If this is good then The problem is probably the resistor module.It is next to the blower motor.The connector from the resistor connects to the blower motor.If you want to confirm this you can check for power and ground at the blower motor connector when you activating the blower switch on.This can be done with a test light.Make sure you have power going into the resistor module also.If you have power going in and no power at the blower motor then replace the resistor.Hope this helps.Good luck.

Dec 28, 2009 | 2002 GMC Sierra C/K1500

1 Answer

The heater in my 1999 vw beetle wont blow air


Check heater blower motor fuse,
Check operation of blower motor control relay,
Check blower motor not faulty- will run if 12V power directly applied to it.

Oct 14, 2009 | 1999 Volkswagen Beetle

1 Answer

Ac blower motor


Check fuse supplying fan is not blown,
Check blower control switch is operating OK,
Check relay controlling fan is operating OK,
Check variable speed resistor pack is not faulty (the resistor pack is usually located in the blower ducting, in the blower airflow),
Check blower motor ground connection is not missing.

Aug 12, 2009 | 2000 Mercury Grand Marquis

1 Answer

Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
  • The thermal limiter cannot be reset and is not serviceable.

Aug 10, 2009 | 2001 Ford Explorer Sport

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