Question about 2002 Oldsmobile Alero

1 Answer

Heater motor. My heater motor still only runs on high after changing the resistor. On the connector only two show full voltage when turning the switch to the different settings. Any ideas????? Thanks

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 360 Answers

Risistor bad. disconect the fan and check for votage drop at resistor if nothing its the resistor. good luck parts stores sell defective parts trust me. carquest is the worst

Posted on Sep 20, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

Air conditioner/heater/vent will not blow air or turn on


Check for full battery voltage at the resistor block, it should have it any time the engine is on, If you don't have voltage to any of the connectors, there is usually a blower motor relay that needs to be checked if all fuses checked out as good.
If it DOES have voltage to the resistor, put the blower speed to full high and check for voltage to the blower motor, if none, then there is a circuit failure, if there is voltage, check the ground side of the blower with an ohm meter, it should read near zero ohms resistance.

Apr 21, 2013 | Cars & Trucks

1 Answer

Remove heater control switch


Before removing the heater switch on this 2006 citroen hdi I would first have the blower motor checked and the most common reason for this and other blower problems would be the blower resistor.

Your blower works on and off at times, first locate the blower motor and the resistor. the blower motor is located on the heater box, look under the pass/side of the dash, you may have to remove under dash cover to see blower.
When you have located the blower now look to the side on the heater box, there you will see a connector plug, it plugs into a connection on the heater box, this will be the resistor, the resistor slides into heater box and the end of it bolts to box to hold it in place and then the connector plugs into it, if you can not locate it then follow wires that plug into blower , follow wires back they will lead you to resistor,
next time blower does not work wiggle connector to resistor and see if blower turns on, if it does then resistor is the problem. also unplug resistor plug at resistor and check for any burning of connectors at plug and inside resistor.

I would bet its a bad resistor or the plug is brunt due to high draw from bad connections, if plug has burn damage to connectors then replace the plug along with resistor.

Jul 08, 2012 | 2006 Citroen C5 HDi

1 Answer

I own a 2005 jeep liberty. the ac, heater fan only works on selector switch setting # 4. nay sugesstions on why fan does not work on settings 1, 2 or 3.


The lower speeds are accomplished by running the power supply through various resistors that drop the voltage which makes the blower turn at different speeds. The lowest setting uses all the resistors to drop the voltage as much as possible to turn the blower as slow as possible. High speed uses no resistors so the blower gets full power and turns as fast as possible.

Since speed 1 and speed 2 use the speed 3 resistor to drop there voltage and speed three is not working as well my guess is the speed three resistor is burnt out in the device referred to as the blower motor resistor or blower motor speed control module. This is located near the blower motor and is held in place with 2 screws. There will be several wires and possibly two connectors plugged into it.

These are really common failures in many vehicles. The parts are usually available at your local auto parts store and they are typically not that expensive.

Hope that helped.

Oct 07, 2010 | 2005 Jeep Liberty

2 Answers

Heat/ac fan only blows on high


Check the heater control switch,,,,,and the number of wires at the heater motor....Some motors have more than one winding...in which case there will be three or more wires going into motor..there can be burnout in those windings and will require a new motor....check the plug which attaches to the motor....can be bad connection...or at the switch.....but if there is only two wires....then the heater switch uses resistors to slow down the different speeds...and direct connection for high speed....and the problem is definitely the switch...

Apr 27, 2010 | 1996 Lincoln Town Car

1 Answer

Fuse diagram for a 98' E-150 van specifically for heater fan


owner manual will tell you fuse layout. If you have only high speed, you have a bad resister. 4 wires.

Resistor —Heater Blower Motor Switch Removal
  1. Remove the battery (10655) ; refer to Section 414-01 .
  1. Remove the battery tray.
    1. Remove the screws.
    1. Remove the battery tray.
  1. Disconnect the heater blower motor switch resistor connector.
  1. Remove the heater blower motor switch resistor (18591).
    1. Remove the two screws.
    1. Remove the heater blower motor switch resistor.
---------------------------------

0f120f5.gif

Feb 26, 2010 | 1998 Ford Econoline

3 Answers

Heater motor only wokks on high


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

Jan 01, 2010 | 2001 Nissan Xterra

1 Answer

The heater in my 2002 Dakota works only at the very highest setting. There is no power at the lowers settings. The defrost light doesn't come on until that setting also, so definantly no power. When turned...


I'm assuming you mean the fan only works on high. If that's the case the blower motor resistor is bad. When the fan switch is on high it puts a full 12Volts to the blower motor. When you have the switch in any other possition, the voltage is routed through the resistor and reduced thus making the motor run slower.

Dec 14, 2009 | Dodge Dakota Cars & Trucks

6 Answers

2005 Pontiac Vibe heater fan working on high only


My 2005 Vibe did the same thing it was the heater resistor. It is located to on the firewall behind the glove box on the lower left side of the blower assembly. Two 5.5mm screws hold it in place (1/4 inch socket works too). I used a socket attached to a socket swivel to replace mine in under 10 minutes. Heater now works as good as new. I purchase mine online for $30 from rockauto.

Jul 31, 2009 | 2005 Pontiac Vibe

1 Answer

I have a 2000 ford E350 van with front and rear air. the front blower motor runs at low speed, The front blower still runs on low even when the knob is set on medium or high. I do not know where the...


it's either the blower motor switch or blower motor resister. Resistor ?Heater Blower Motor Switch Removal Remove the battery (10655) ; refer to Section 414-01 . Remove the battery tray. Remove the screws. Remove the battery tray. Disconnect the heater blower motor switch resistor connector. Remove the heater blower motor switch resistor (18591). Remove the two screws. Remove the heater blower motor switch resistor. ----------------------------------- Switches Removal Disconnect the battery ground cable. Remove the center trim panel; refer to Section 501-12 . Remove the control assembly. Remove the screws. Remove the control assembly. Remove the A/C-heater function selector switch knob. Disconnect the vacuum harness connector. Disconnect the A/C-heater function selector switch connector. Remove the A/C-heater function selector switch. Remove the screw. Remove the A/C-heater function selector switch. Remove the temperature control switch knob. Disconnect the temperature control switch connector. Remove the temperature control switch. Remove the screw. Remove the temperature control switch. Remove the heater blower motor switch knob. Disconnect the heater blower motor switch connector. Remove the heater blower motor switch (18578). Remove the screw. Remove the heater blower motor switch. ----------------------------

Mar 31, 2009 | 2007 Ford E-350 Super Duty Length XLT

2 Answers

Blower moter will not work


Check the 30 amp fuse in the fuse box under the instrument panel on the drivers-side. If it's alright remove the connector from the heater resistor mounted on the passengers side close to the blower motor. These are usually secured with small hex headed screws.With the ignition switch in run, turn the heater on and use a test light to see if you have voltage coming to any of the connector pins. If you don't you'll need to trace back until you locate the problem. If you do have voltage check the resistor. Don't forget to turn off the ignition switch.

Jan 06, 2009 | 1994 Ford Escort

Not finding what you are looking for?
2002 Oldsmobile Alero Logo

95 people viewed this question

Ask a Question

Usually answered in minutes!

Top Oldsmobile Experts

yadayada
yadayada

Level 3 Expert

60667 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21936 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you an Oldsmobile Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...