Question about 1998 Chevrolet K1500

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Low air flow from AC/Heater fan on '98 Chev K2500

Fan has speeds (so not resistor?), and no troubling noise (so not fan motor?), but very little air flow. Could this be blocked filter, faulty resistor, or just weak fan motor? This is farm truck exposed to lots of dust and dirt. The solution of how to remove fan was a help. Thanks

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Check the cabin air filter behind the glove box, if it is ok or is not equipped (was optional) then the problem is a clogged ac evaporator core.

Posted on Jun 23, 2009

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Posted on Jan 02, 2017

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1 Answer

98 dodge Ram 1500 electrical manual? Heater quit working, fan not turning on?


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i suspect
a faulty on /off switch in the dash panel

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How To Replace AC Heater Blower Motor Fan Speed Control Resistor Accord 98-02...


How To Install Replace AC Heater Blower Motor Fan Speed Control Resistor Accord 98-02 1AAuto.com<br /><a href="http://www.1aauto.com/1A/ACCondenserFanAssemblies/Honda/Accord/-/-/2000?utm_source=fixya&utm_medium=forum&utm_campaign=1ATony"><br />This part is available on 1aauto.com</a><br /><br /><utube src="vRs1JJ42Eg0"><br />

on Jun 21, 2011 | Honda Accord Cars & Trucks

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Fan speed wont change speeds on heat or cold cycles


Sounds like the Blower Motor Resistor. The range from 10 to 75 dollars depending on what kind of vehicle. Pretty easy to change.
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Nov 09, 2014 | Cars & Trucks

1 Answer

Ac/heater will only work on low when you move it to med or high it shuts off


need to check switch,resistor and fan ---ur switch might have resistor built in it would need to be tested for continuity for the other speeds --if your truck [didnt specify which ] has a separate resistor it should be attached to the heater fan motor housing again resistor needs to be tested -also test ur fan for any resistance or overheating

Apr 10, 2014 | 1993 Toyota Pickup

2 Answers

Ac fan motor doesnt work on low speeds only on


I will assume the heater fan also doesn't work on low. You will need to replace the fan speed selector switch

Jul 26, 2010 | 2006 Isuzu i-280

1 Answer

Heater fan only works on "high speed"


All cars are designed with a blower fan motor that pushes air through the ventilation system. This air is processed by a series of vents to direct the air to various positions. Example: heater, air conditioner and defrost modes. Most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings.
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Mar 02, 2010 | 1999 Buick Century

1 Answer

My chevy ac blows only on fan speed 5 what could it be


It is a 99% chance you need a new fan speed resistor board.
It is beside the fan motor.... it sits in the heater/AC duct work to use the air flow to cool itself.
It costs about $35 and takes 15 mins to change.
Did you loose one speed then another and now only high works?
That's the usual way they fail.

Sep 18, 2009 | 1995 GMC Suburban

1 Answer

My 2002 Dodge dakota King cab 4.7 litre V8 ac/heater fan quit on me yesterday. I get an ac light when the ac button is selected and a little residual air flow when in motion but the blower motor rotary...


Look for a plastic black plate of rectangular shape. Thics could be under the hood on the pass. side firewall or under the dash on the pass. side. It will be attached to the ac/Heater box with to 5/16 hex head screws. The plate will have four push terminals connected to it by a singular connector plug. This is your blower resistor and controls the # 2 3 4 speeds from the switch. They go without notice. take it out and look for signs of burnt or melted coils.

Sep 08, 2009 | Dodge Dakota Cars & Trucks

1 Answer

Heater fan only works on high after replacement of heater core


It's very possible the fan motor has quit. The squealing noise is caused from motor bearing failure. As the bearings wear out or dry up the motor is harder to turn and require more current to run the motor. On lower speeds, the motor runs off a series of resistors that reduce the amount of voltage and current so the fan runs a lower speeds. If the bearings are worn, there is not enough voltage or current to turn the motor and that's probably the humming noise your hearing.
Good observation by the way.
Let me know.
regards,

Feb 13, 2009 | 2001 Chevrolet Prizm

1 Answer

2002 saturn heater


The problem is the blower motor speed control resistor, it is located near the blower motor in the housing.

Nov 23, 2008 | 2002 Saturn Sl

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