Blower fan speed ideas?

Blower fan speed ideas?

Postby Mr_Bowtie [OP] » October 8th 2010, 2:33pm

Ok....on my '96 lately the fan blower doesn't always turn on. After a little impatience with it I found hitting the dash above the blower speed switch would make it turn on. All the speeds work. Haven't smelt anything melting. I have yet to open the dash up, but was wondering if anyone can pin point it before I do take the dash apart. I'm leading to a bad switch, so I would have to replace that whole heater/A/C switch panel. :think: Thanks! :chevy:
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Re: Blower fan speed ideas?

Postby Phantom » October 8th 2010, 4:04pm

Yea I would check the switch , you may be able to clean it and that may help , but it probably is reaching the end of its life
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Re: Blower fan speed ideas?

Postby Munken » October 8th 2010, 4:11pm

Mr_Bowtie wrote:I found hitting the dash above the blower speed switch would make it turn on.

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Re: Blower fan speed ideas?

Postby GaryZ » October 8th 2010, 5:07pm

There is a blower control circuit board mounted to the front of the blower chamber and behind the coolant overflow tank. Remove the overflow tank and windshield washer tanks. Unplug the blower control and test the dash switch operation. I believe the problem is probably the circuit board . . . There was a recall on these stupid things. The replacements require cutting the blower chamber opening to make them fit.

http://www.oreillyauto.com/site/c/detai ... &ppt=C0039
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Re: Blower fan speed ideas?

Postby Mr_Bowtie [OP] » October 8th 2010, 11:14pm

Its gotta be something in the dash as I hit the dash then it works like it should until the next time I start the Van up. I will check the dash stuff out first and then move on the the circuit board. Thanks for the tips guys!

Its not a easy touch Munken.......GM needs to work on it a little. :lol:
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Re: Blower fan speed ideas?

Postby webcat » October 8th 2010, 11:22pm

GaryZ wrote:There is a blower control circuit board mounted to the front of the blower chamber and behind the coolant overflow tank. Remove the overflow tank and windshield washer tanks. Unplug the blower control and test the dash switch operation. I believe the problem is probably the circuit board . . . There was a recall on these stupid things. The replacements require cutting the blower chamber opening to make them fit.

http://www.oreillyauto.com/site/c/detai ... &ppt=C0039

Is this the circuit board ?
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Re: Blower fan speed ideas?

Postby GaryZ » October 9th 2010, 6:24am

webcat wrote:
GaryZ wrote:There is a blower control circuit board mounted to the front of the blower chamber and behind the coolant overflow tank. Remove the overflow tank and windshield washer tanks. Unplug the blower control and test the dash switch operation. I believe the problem is probably the circuit board . . . There was a recall on these stupid things. The replacements require cutting the blower chamber opening to make them fit.

http://www.oreillyauto.com/site/c/detai ... &ppt=C0039

Is this the circuit board ?


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Re: Blower fan speed ideas?

Postby Mr_Bowtie [OP] » October 9th 2010, 1:51pm

Got work this week a ton....so hopefully going to look into it when I can. Time is running out with winter coming! :banghead:
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Re: Blower fan speed ideas?

Postby astroturf » October 9th 2010, 1:54pm

WalMart is having a two for one sale on little kids winter jackets...

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Re: Blower fan speed ideas?

Postby Lumpy » October 12th 2010, 12:57am

astroturf wrote:WalMart is having a two for one sale on little kids winter jackets...

LOLz, Jim



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Re: Blower fan speed ideas?

Postby Silver96 » November 8th 2010, 12:00pm

Hello,

The dash comes off pretty easily. I ended up with 3 Control panels, (shipped me the wrong one 2 times) when trouble shooting my blower problems... If you need one PM me. They are big vacuum plugs on the back. Prehaps one has come loose.
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Re: Blower fan speed ideas?

Postby Mr_Bowtie [OP] » November 8th 2010, 3:57pm

Thanks........I will keep you in mind. I haven't dug into it yet as it kind of went away for a few weeks and now my wife said its doing it again. :banghead: :D
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Re: Blower fan speed ideas?

Postby Phantom » November 8th 2010, 5:29pm

I have just done a good bit of research on this topic as I have a no high speed problem and have read some other threads about what other people say they found as the problem,
One guy said his problem was exactly like yours , and he replaced the resistor and that fixed it temporarily. I have found that what commonly happens is first corrosion starts to build on the plug connector that plugs onto the resistor , cleaning the terminals or just replacing the pigtail has fixed many that just had a no High speed setting , as the corrosion is on the connector preventing full electrical contact but yet allows for some low level electrical contact.

This corrosion creates a high resistance in the circuit which places a higher demand on the blower motor , which if not cleaned or corrected soon enough it not only will cause the resistor to fail but over time this adds to the wear on the motor. the motor gets to the point where it is going bad and demands a higher current draw which in turns will burn out new resistors. since a brand new resistor cost about 40-60 bucks , it would be a good idea to replace the motor at the same time to avoid the cost of replacing more resistors in the future. since this matter is a progressive one , not all vehicles are at the very same stage in wear , Strange as it seems the guy who said that beating on the dash problem was fixed by replacing the resistor , temporarily , he found the permanent solution in replacing the motor and resistor together, I would examine the dash control first , as the switch can cause this as well. i went to the salvage yard yesterday and got what looks to be a brand new control panel for cheap , I also got a couple pigtails and a couple resistors and a couple of Remote Keyless Entry Modules , So you will want to check all points to find out what your problem is , I learned on fixing my Buick that just jumping in and replacing the resistor and then the motor , and to find that it was the dash switch that was the problem, so inspecting that would be the easiest place to start to find the problem.
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