Question about 2005 Chevrolet Colorado

1 Answer

Fan for the a/c - heat will only work on high.

The fan for the a/c - heat will only work on high (4). Occasionally it will work on 1 or 2 but eventually stops. It will not work on 3 for anything.

The a/c & heat both work just fine but I only have the one fan speed.

Posted by on

  • crzn4christ Oct 01, 2009

    I found my resistor, it was very accessible as it was kind of under and behind the glove box.

    I unbolted it and attempted to unplug and then decided to try the fan and see if it would work. It did - on all four speeds. I tried different speeds, turned the vehicle on and off and tried it again and it works fine. I have not reinstalled the resistor yet as I did think that I could smell what seemed like wires burning or maybe like the smell of burnt hair in a hair dryer odor.

    I didn't see any smoke and all the wires going into the resistor plug seem intact. I figure I will go ahead and replace the resistor just to be safe but could this be an indicator of why the resistor itself went bad?

  • crzn4christ Oct 01, 2009

    I got the resistor unplugged only to find one of the connectors burnt on the inside and the same with the plug containing all the wires. There is one connector or what ever you call it that is burnt looking and kinda frazzled. I'm not sure if the wiring harness can be replaced easily or not. I traced it out and it meets up with another plug so I don't know. Can anyone help?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 623 Answers

Common issue for many cars, Jeeps big time. Your "Blower Motor Resister" is defective. The reason for only 4 on the speed is the resistor controls the voltage going to the blower motor on the lower three speeds. This is a common problem, don't let anyone tell you it is the blower moter itself. The part should cost between $20-$40, depending on where purchased. The killer is getting it installed, some are easy to get at behind the glove box, others are up in the dashboard harder to get at. Chevy techs should be well aware of this, and be able to give you a good estimate of repair.

Posted on Oct 01, 2009


1 Suggested Answer

  • 2 Answers

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

a 6ya Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Heater a/c control unit not working

what mode, heat or cold?
does fan blow?> no "? then replace the fan fuse.
fan blows on high? yes.
then if A/C ? wanted? why not say? then the green light glows
near A/C switch, does it? y/n
yes the does A/C compressor clutch close? and compressor shaft turn? y/n.?
or its heat you want? not stated.
so no heat, is a whole other list. ill try.
1: engine not hot, not 180f min. and holding (y/n)
2: cab fan dead.
3: heater core not hot, (feel the hose there both must be hot)
4: damper stuck closed blocking heater core.

Mar 25, 2014 | 1996 Geo Metro

1 Answer

Air condition and heat won't work

Check to see if you are getting voltage to the blower motor if you are the motor is bad if not check the fan speed switch. 1 2 3 or low medium high if you get voltage going to the switch but not from replace the switch if you have voltage from switch check the blower motor resistor the although with the blower resistor you commonly have a high fan speed in the max setting and the lower speed settings don't work wich would make you think 1 2 3 are not working but 4 is. That is why it is best to check all parts to make sure the part you do replace needed to be replaced

Oct 15, 2012 | 2000 Ford Focus

1 Answer

Fan for heat/air will not work on 1-4 settings

check the blower motor resistor that is where the different speeds come from

Dec 07, 2009 | 2002 Buick Rendezvous

1 Answer

The AC blows on #4 fan setting but doesn't blow at all on 1-3

That is the blower resistor. 4 is wide open, so, no resistance. I had 4 of them put into my truck. The wires were burnt and shorted the others until the problem was found. Check the plug if you do this yourself.

Jun 13, 2009 | 2005 Chevrolet Colorado

1 Answer

Heater blower motor only works on high on 2002 pontiac gran prix se-instructions on diy replacement i have the part. Heater Fan works occasionally on speed 5 only. When it doesn't work at all the lights...

for the fan blower motor it could be the resistor or the fan control speed control switch is bad.for no lights replace the DRL RELAY for the lights. for the heated seats check the fuses.

Jun 01, 2009 | 2002 Pontiac Grand Prix

1 Answer

Blower fan only works on high

If it is working at all then the relay and fuse is good and the problem is either the little vacuum hose on the back of the control switch panel or the panel itself.

Feb 01, 2009 | 2001 Chevrolet Silverado

1 Answer

The temperature knob does not work on low. High works occasionall

you need to change blower motor resistor by blower motor right behind blower right side under dash.

Jan 10, 2009 | 2000 Pontiac Grand Prix

1 Answer

Hyundai coupe r/h drive heater

hi from uk your heater fan problem is most likely to be what is known as the resistor pack sometimes called the reostat and is connected to fan motor case it has the wires for fan connected this unit operates rather like an elec hob controlling amount of heat if this simplifies it for you? speeds 1 2 3and 4 gives the speed selected on fan control knob not too difficult to find and diy a replacement? and not too expensive ? these units do burn out occasionally on most cars as they age hope this helps/inspires ?

Jan 08, 2009 | 2000 Hyundai Accent

1 Answer

Previa, no heat on 1 and 2 gear

the blower motor resistor is bad.

Oct 29, 2008 | 1993 Toyota Previa

Not finding what you are looking for?
2005 Chevrolet Colorado Logo

580 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77202 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides