Question about 2002 Buick Century

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Heater wont work after changing blower motor and resistor

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: A/C Heater blower fan does not cycle through all speeds

Yes it is the blower Motors Resistor board. It is up behind the blower motor, just under the glove box. You have to remove the black KICK panel with its two "Push Pins" that will break too. There are 3 screws holding that resistor board in, the back two are a bear to get to. Good luck.

Posted on Feb 26, 2010

honeymokey
  • 3113 Answers

SOURCE: Heater/defrost/ac fan not coming on park avenue...can hear click

Check the connector to the blower motor. Turn it on and wiggle the connector.

Posted on Mar 08, 2010

ZJLimited
  • 17970 Answers

SOURCE: I need a diagram for

The blower motor is a variable speed motor. The higher the voltage applied to the motor, the faster the speed. Depending on the HVAC (Heater Ventilation Air Conditioning) option installed in the vehicle, blower speed control could be through a set of resistors or through a solid-state blower motor control module.Battery voltage to the blower motor is supplied by the heater & A/C control by way of the blower resistor (or blower motor control module). At low and medium speeds, the voltage is stepped down by the blower motor resistors. At high speed, the blower motor relay is energized, removing the blower motor resistors from the circuit. Battery voltage is then applied directly to the blower motor through the relay. The motor will then run at maximum speed.

Several types of HVAC systems were available on these vehicles, from manual to fully automatic electronic control. The blower motor speed can be adjusted manually by pushing the fan switch up or down or automatically by placing the heater & A/C control in the AUTO mode.

In general, this system is reliable. Because so many of the control operations are electronic, special diagnostic equipment really should be used for system diagnostics and check-out. An authorized technician using a scan tool can most quickly locate HVAC problems.

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Fig. Typical behind-the-instrument panel view of HVAC related components. Depending on the HVAC option, not all components are used on all vehicles

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Fig. Typical HVAC operation schematic
An inoperative blower motor could be caused by the following:

Blown fuse(s). The fuse should be replaced. There may be both a LOW BLOWER and HIGH BLOWER fuse. Some models may also call it the HVAC fuse. Even the RADIO fuse is used in some applications. Check them all. If a fuse is blown there may be a short to ground in one of the power supply circuits. Open Circuit. Check the circuit between the ignition switch and the blower motor, and the blower motor ground circuit. Repair as necessary. Faulty blower switch. A faulty blower switch should be replaced. Most heater blower circuits also include a blower motor relay (look in the underdash convenience center), as well as a blow motor resistor. These items should be checked especially if the blower runs in one or two speeds, but not all speeds selected.

The blower motor resistor is located on the back of the blower motor housing under the dash on the passenger side. It can be difficult to get at, but it is doable. Be ready with the ibuprofen the next day for your sore back.
Remove the cover panel from beneath the dash on the passenger side.
Unplug the power 'ribbon' wires leading to the resitor.
Unplug the wires that lead from the resitor to the blower motor housing. There are usually two, one black and one purple that share the same plug.
Remove the short hose that leads from the blower motor housing to the ventilation system ducts.
Remove the blower motor by removing the three hex screws that hold it in place.
Remove the resistor by removing the three hex screws that hold it in place. The resistor is right against the firewall so two of the screws are very difficult to reach. A slender flexible socket extension will make the job easier.
Attach the new resistor in place using the same hex screws. Only 1 or 2 of the original three are needed (the part is very light) if you do not feel like fighting with the ones next to the firewall.
Reatach the blower motor and reconnect the hose.
Plug the power cable wires back into the resitor and the wire from the resistor back into the blower motor.

Instead of hex screws mine were held in with 7/32 bolts. It was difficult, but easier than I had anticipated. I replaced two of the three bolts holding the resistor. The blower motor came with instructions saying that the plugs may have to be cut off of the resistor and the blower motor, then spliced together... I had to do this on mine.
I got everything back together and now the fan works on four of the five levels. It does not work on high.

I found on another site that said "high" uses a different circuit, with a separate fuse. I found the fuse panel on the passenger side of the dash when the door is open. The cover for the panel has all of the fuses mapped out, so it was easy to spot the 25 amp "Blower High Speed" fuse. I was very impressed to find the panel contained a fuse puller and replacement fuses. Mine was blown, I replaced it, and all is good with the world.

Hope helps.

Posted on Sep 08, 2010

jturcotte
  • 8123 Answers

SOURCE: 99 Buick LeSabre, Heater/AC blower kicks in and

most likely it's the switch.

Please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 27, 2010

airjer995
  • 5332 Answers

SOURCE: 98 century heater blower motor resistor location

look under the passenger side of the dash. There will be a plastic trim panel that will need to be removed. Once its out of the way you will see the blower motor. The resistor will be just to the drivers side of the blower motor.

Posted on Nov 15, 2011

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The 1st picture is of the resistor used with auto climate control the 2nd is manual AC/Heater.
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How to change blower motor in. 99 grand Cherokee


Check this procedure...Blower Motor Resistor and Controller Replacement


REMOVAL

1. Disconnect and isolate the batten' negative cable.

2. Depress locking tab and unplug the wire harness connector from the blower motor

resistor or controller (power module).

3. Depress locking tab and unplug the resistor or controller connector from the blower

motor.

4. Remove the 2 screws that secure the blower motor resistor or controller to the

heater-AC housing.

5. Remove the blower motor resistor or controller from the heater AC housing.


INSTALLATION

1. Install the blower motor resistor or controller to the heater AC housing. The

housing is indexed to allow (controller power module) mounting in only one

position. Tighten the mounting screws to 2.2 Nm(20 in. Lbs.).

2. Plug in the wire harness connector to the blower motor resistor or controller.

3. Plug in the connector from the blower motor resistor or controller to the blower

motor.

4. Connect the batten' negative cable.

zjlimited_1958.jpg


Hope this helps (rerember to rating this and leave a testiomonial).

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I have a 2000 grand prix 3.8 with heater problems. i have changed the heater core, thermostat, resister, blower, the 2 relay switches and heater fan. there still is very little air coming thru.. any...


The blend door may not be working properly. It is actuated by a vacuum motor.

or the following part may be bad:

Blower Motor Control Module Removal & Installation To Remove:
  1. Remove the insulator from the right side of the instrument panel.
  2. Disconnect the connectors from the blower motor resistor and blower motor.
  3. Loosen the two forward screws and remove the rear screw of the resistor assembly.
  4. Remove the blower motor resistor assembly.
To Install:
Install the blower motor resistor assembly. Install the rear screw and tighten the forward screws. Connect the electrical connectors to the blower motor and resistor assembly. Install the insulator under the right side of the instrument panel.
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Jan 21, 2011 | 2000 Pontiac Grand Prix

1 Answer

How do i change blower motor resistor on 99 jeep grand cherokee


Welcome to FIxYa.com



Blower Motor Resistor and Controller Replacement

Image Blower Motor Resistor Or Controller/Power Module Remove/Install

REMOVAL

1. Disconnect and isolate the batten' negative cable.

2. Depress locking tab and unplug the wire harness connector from the blower motor

resistor or controller (power module).

3. Depress locking tab and unplug the resistor or controller connector from the blower

motor.

4. Remove the 2 screws that secure the blower motor resistor or controller to the

heater-AC housing.

5. Remove the blower motor resistor or controller from the heater AC housing.

INSTALLATION

1. Install the blower motor resistor or controller to the heater AC housing. The

housing is indexed to allow (controller power module) mounting in only one

position. Tighten the mounting screws to 2.2 Nm(20 in. Lbs.).

2. Plug in the wire harness connector to the blower motor resistor or controller.

3. Plug in the connector from the blower motor resistor or controller to the blower

motor.

4. Connect the batten' negative cable.

leedavidian_45.jpg



Thank you for using FixYa.com

Regards, Lee Davidian

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Hello Callahan5922....this sounds like a stuck blower motor resistor. I assume the blower won't function in the a/c mode either? If you have a digital multimeter you can check this. I believe it's fuse #2....if the digital indicator goes up or down when you increase or decrease the fan speed thats good. Locate the blower motor resistor....you wil find it located on the fire wall behind the right valve cover hiding behind the heater hose, it's about the size of a cigarette pack. With the engine off, and key in on position, turn the A/C on High, and rap a tap tap tap on the resistor. You might be suprised when the blower motor takes off a runnin,
I hope this is the answer you need and i was able to help solve this for you. Good luck...

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