Question about Cars & Trucks

1 Answer

Blower fan low speeds dont work just runs on high....is it the resister...check the relay seems ok

I have a 1990 olds royal and the blower fan for the heating and cooling only runs on high. i check the relay and that is working fine. next step was the resister but iam not real sure it is located. some are under the dash and some are behind the blower motor itself. i dont want to tare things apart that dont need to be. thank you dean

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 2,122 Answers

Hi Dean, I don't really know what you mean by the register, but I believe your problem is to do with the resistor which is built into the fan housing. It consists of three wire wound resistors and is fitted into the fan housing to take the benefit of the fan to cool the resistor pack. The climate fan at full speed runs directly from the battery voltage. The lower speeds run through the relevant resistors (which are of different values) and thereby run the fan at decreasing speeds. Remove the covers from the both sides of the fan housing and on one side you will see a small panel held in position be one or two screws. The panel will have cables plugged into it, which are those for the fan. To confirm you have the correct panel, turn on the ignition and the fan at full speed and disconnect the plug from the socket. the fan will stop and bingo! you have it! Remove the unit and either repair the unit or better still go to a breakers yard and buy a replacement from there before they wreck it! Fit it in, connect the plug, put back the paneling and enjoy. Regards John

Posted on Feb 18, 2012

Ad

4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 1 Answer

SOURCE: 1990 Toyota 4x4 heater resister location?

As it turns out, the dealership sent me the wrong part so there is no wonder why I couldn't find it.D'oh! They sent me the heater relay switch by mistake and of course they look nothing alike.I would like thank you for your help and will remove the post so as not to cause any grief for anyone.Thanks again.

Posted on Jan 08, 2009

  • 9 Answers

SOURCE: Need to get to the heater blower behind the

Remove the screws on the glove box, then on the side of the dashboard you will see two caps. Remove the caps and you will see two nuts that you have to remove. once you have removed the bolts, you can remove the straps on the blower and evaporator. once you remove the straps have some one help you lift the end of the dashboard up carefully to give you room to remove the blower. and disconnect the connectors. You will have to play a little bit to remove because of the tight space.

Good Luck

Posted on Jul 22, 2009

zappanut
  • 959 Answers

SOURCE: my fan for the Ac

the blower resistor is in the plenum... above the heater core.
If the blower motor does not work at all ... you may have a bad climate control switch.... or blown fuse even... as the resistor is a two stage coil... Low speed and medium speed... no resistor on High and would normally not go at the same time....

Posted on Sep 30, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Low air coming out of vents ,blower is working


resister either defective or wire incorrectly probably, try running jumper wire to motor to see if it has full speed.

Feb 01, 2016 | Cars & Trucks

1 Answer

3 speed fan barely changes speed


You are talking about your blower fan for the air conditioner and heater right? More information will be needed to solve the problem.

When you say it barely changes speeds, does that mean it doesnt speed up, or doesnt slow down? By that I mean, is it "stuck" on low, or high?

Most blower fans run at different speeds through the use of a multi-stage resistor built into the fan switch circuit. Low speed is a high value resistor, medium speed is a low value one, and high speed is the fan running without any resistance.

If your fan is running on high and doesnt seem to want to run on lower speeds, the resistor pack may be failing. If the fan is running on low speed only, it may be that the fan itself is beginning to fail, or that the lubricant in it has gotten gummy.

Dec 07, 2015 | Cars & Trucks

1 Answer

1992 chevy C1500: Heat works on low speed, no medium, and high only works intermittantly.


On any other vehicle it sounds like the blower fan switch.
The fan switch provides power or ground to the resistor and there would be a high speed blower relay to bypass the resistor.
But in your case the fan switch is part of the controller.
I don't have a diagram for a 92 but the 94 model shows relays for low medium and high speeds. Each relay gets power from a fuseable link. The high relay gets power thru the low relay if the low relay is not engaged.
If you have the model with 3 relays you may need to check them.

Feb 01, 2013 | 1992 Chevrolet C1500

1 Answer

The fan in my 2002 GMC Savana cargo van doesn't work. I lost low, then medium speed, and finally the high speed.I checked the fuses and relays.I changed the blower resister, still no fan. The heat


Hi Jim, If the vehicle is fitted with climate control it will have electronic management. However it can be wired by someone knowing electrical circuitry to by pass the control. It will save you some cash but will need manual control. Make sure whoever does the job knows what he or she is doing. Have a happy new year. Regards John

Dec 31, 2012 | 2002 GMC Savana

2 Answers

My 2004 grand marque's blower motor stoped working is it the blower motor relay or the resister?


If 1, 2 & 3rd speed not working, it is resistor (assuming you don't have EATC). High speed will work if fuse is ok and resistor is burned.
EATC = Electronci Auto Tem,p Control (Digital)

Nov 10, 2010 | Mercury Marquis Cars & Trucks

2 Answers

Heayer doesn't work


The resistors provide resistance in the circuit, dropping voltage to the blower motor to slow the motor speed down. On high, the blower receives full voltage through the blower relay.

If you had High but no other speeds, then the resistor pack is usually the culprit. If you have all other speeds but high, the most common problem is going to be the blower motor itself, relay, or the switch panel.

You can check this by turning the fan speed to "high", unplug the blower motor, and check to see that you have roughly at least 12v at the plug. If you have 12v, that means the switch panel is activating the relay and the relay is working. Over time, heat kills the magnetic properties of the magnets inside an electrical motor. Without enough magnetic energy, you may not get enough opposing force to spin the rotor full speed when the windings energize, but still enough to spin at lower speeds.

Another thing you can check is the connector at the blower motor and the switch panel. Sometimes these will heat up, start to deform, and cause a bad connection. The bad connection may be able to handle the lower current draw on low speeds, but the higher resistance from the bad connection won't be able to handle the higher current while in the full speed position.

Hope this helps, keep me posted. be glad to help you get your heater working again soon.

Jan 07, 2010 | 1995 Chevrolet Tahoe

2 Answers

Blower on 2005 chev Impala works sometimes


its a bad ground run a ground wire form the neg side of the battery too the metal plate on the motor!!

Aug 26, 2009 | 2005 Chevrolet Impala

2 Answers

Front blower motor doesn't work, rear does


yes, all blower motors have them to control their speed, High, medium, low.. etc. I earn nothing by helping you, but my rating, a fixya rating and I will walk you through this

Dec 20, 2008 | 2005 Chrysler Town & Country

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

68 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...