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


fan motor relay is for fan speeds
heater and AC

blower motor has a resistor
did the motor bench test ok
if fan motorand resistor are ok
i suspect
a faulty on /off switch in the dash panel

i think that system has electronic directional flap actuators not vacuum ..if vacuum might be a leak ..4d2d0af7-5ca3-476a-86ab-3456f74cc675.gif

Mar 07, 2017 | Dodge Cars & Trucks

1 Answer

Fan speed knob won't turn


Best solution would be to replace entire switch and knob. Hopefully, You can find these at a salvage yard. If not you will have to purchase thru dealership

Nov 12, 2013 | 2003 Pontiac Montana

1 Answer

Heater fan turns off


wiggle switch when it acts up with out turning up or down speed if it comes back on your switch is going out does it do this in all speeds does it have climate controll or all knobs

Mar 27, 2012 | 2004 Chevrolet Impala

1 Answer

My 02 nissan pathfinder interior fan runs even when not turned on.checked all fuses they seem to be fine.


If fan still runs when all your heater control knobs and buttons are off, it is likely a bad heater fan switch. Unless you have something like a body control module found on newer cars that has some control over interior functions. If not, try a new heater fan switch. Good luck.

Jan 18, 2012 | Cars & Trucks

1 Answer

The temperature control does not change when the fan is turned up. if i want to change the temperature from hot to cold, i have to turn down the fan, listen for the switch in the dash and then turn the...


I can tell you about my experience on my 1999 F150. I do not believe it is the blower control switch because mine went out and only affected the fan speed. On my truck, in an incident like yours, I could not get a good response from the temperature switch.

I would turn the control and it would hit a stop on both ends, but the temperature would not change to match the switch. What I found is the stem of the temperature control did not turn because the knob cracked behind the switch. There is a half-moon shaped metal clip inside the plastic temperature knob. The clip can spin when the knob is cracked and nothing moves right.

Because the plastic knob has molded stops under the knob, from the drivers point of view, the knob was turning lock to lock. In reality, the stem was not turning. Try taking the knob off and turning the stem with pliers wrapped in cloth to protect the plastic. Then see if the temperature changes.

Jun 30, 2011 | 1998 Ford F150 Regular Cab

1 Answer

On my 1999 Chevy Malibu when you press the switch for the a/c it will drop out if you turn the fan knob to a different setting. The same when you select out side air or recirculate they bounce back and...


it sounds vacuum related the fan knob relates to the fan motor (electrical) the vacuum switches relate to the heater controls hope that makes sense

Apr 09, 2010 | 1999 Chevrolet Malibu

1 Answer

Fan control knob name. Automatic shifter base inner cover name.


blower switch knob most likely dealer item, shifter boot, both be dealer items

Feb 09, 2010 | 1991 Toyota Celica

3 Answers

The heater/ac fan only works on speed settings 4 & 5


you might check your switch sounds like to me that your two lower speed sides of the switch maybe burnwed out.

Dec 19, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Subaru Loyale 1994 Heating fan quit working


one of two solutions:

The contacts on your fan switch are bad, or you striped the knob and it won't turn the switch on, or the big bad one...your fan motor has decided it needs a vacation.

Hope this helps you, and I hope it's just the knob is stripped..it's the lesor of two evils

Dec 31, 2008 | 1994 Subaru Loyale

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