Question about 1999 Chevrolet Silverado 1500

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Heater /. heater acts like it has a shortage. i've been hiting the bottom of the motor for a couple of weeks now to make the heat actually kick on. now when i hit the bottom of the motor i get nothing. if anyone has a solution, please notify me. thank you.

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  • shantel84 Jan 30, 2009

    ok thanks someone else suggested the same solution. just wanted 2nd opinion


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  • 12 Answers say there is also a resistor pak to control the motor speed located that also will restart the blown motor if jarred........lets talk

Posted on Jan 30, 2009

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The brushes inside the heater motor are probably wearing out and the motor needs to be replaced.

Posted on Jan 30, 2009

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How do i remove the fan wheels from my 92 accord heater motor?

Difficult to describe without pics, but…:
Once you’ve removed the glove box (I assume you’ve done this, and maybe you already have the motor out, in which case you can ignore most of this down to the underlining)
If the vehicle is equipped with air conditioning, remove the strap bolt (between the two nuts for the evaporator on the left and the two nuts for the blower housing (the housing is probably white) on the right, just a bit lower than those) then the blower under-cover and the three blower housing retaining nuts (two nuts at the top, already mentioned, and the nut at the bottom, which is roughly between the evaporator on the left and the blower housing cover on the right).
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02 grand cherokee heater turns off when on

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Mar 27, 2009 | 1999 Jeep Grand Cherokee

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Heater comes on and go off when it wants to.

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Firstly, if the airflow starts and stops, you'll find a loose connection between the the fan switch and the blower itself. If the connections are sound, then look for a loose ground connection to the blower. If all electrical connections are good, and it still starts and stops erratcially, then it's time for a replacement blower.
Secondly, If the air is constant and the heat comes in and out, the the options are a faulty water pump or partial blockage in the colling system or heater core. If the water pump is failing and working erratically, then when the heat dissipates in the cabin airflow (it has used all the heat in the heater core and no circulation to replace the cooled water with hot water) the dash temp gauge should start to climb, indicating that the coolant is no longer circulating, the heat has left the heater core but the engine is not being cooled. You'll need to replace the water pump. If this is the case, take care of this ASAP as you run the risk of a an engine overheat.
If the dash temp gauge looks normal, then you're likely looking at a partial obstruction in either the cooling system or the heater core that blocks the flow and then works its way loose erratically. Limescale and crud buildup in your cooling system (especially in a 15-ys-old car) can cause this when flakes of buildup brake loose from the walls of the larger channels and get caught up in the smaller ones. Your local parts store will have additives to clean out the cooling system, but if they don't work (they can only do so much) then you're looking at a professional cooling system flush. If the issue persists after that then you're likely looking at a heater core replacement.
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Hope this helps, and please rate my answer.

Dec 31, 2008 | 1994 Geo Tracker

2 Answers


If the fuse is blowing there is too much resistance in the cooling fan moter. Replace JUST the cooling fan motor and the fuse. The A/C always turns the cooling fan ON when turned on. That is why the A/C messes up when the fan motor is bad. Replace the fan motor and the A/C problem will be fixed too. :)

Aug 07, 2008 | 2004 Chevrolet Cavalier

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