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Truck AC help

Posted on 8/3/16 at 8:10 am
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 8:10 am
2003 Chevy Silverado Crew Cab 1500HD

AC only blows on high setting (5)
No air blows on 1-4

Blows plenty cold but only on high setting.

Any idea what the problem may be and the cost to get it fixed?

Thanks
Posted by Napoleon
Kenna
Member since Dec 2007
69049 posts
Posted on 8/3/16 at 8:22 am to
If the fan only works on one setting, and no other then usually it's the blower motor resistor in the airbox next to the fan.

If its not that it's the fan itself.
DIY resistor change


Very common thing to fail.
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 9:13 am to
quote:

Napoleon


Any idea cost wise at a mechanic for the blower motor?

Any idea cost wise at a mechanic for the fan?
This post was edited on 8/3/16 at 9:14 am
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 9:20 am to
quote:

Napoleon

quote:

DIY resistor change


Thanks for the link. Definitly will try that out myself.
Posted by meauxjeaux2
watson
Member since Oct 2007
60283 posts
Posted on 8/3/16 at 9:21 am to
it's always the blower motor resistor when the fan only works on high
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 9:27 am to
quote:

meauxjeaux2


That youtube video looks pretty easy to do myself and part is less than $40.

MeauxJeaux - is this something that is as easy as it looks or could I really screw it up. I am not mechanically inclined, but willing to try if it is as easy as the video.
Posted by meauxjeaux2
watson
Member since Oct 2007
60283 posts
Posted on 8/3/16 at 9:31 am to
it's as easy as changing out your wiper blades. Find a Carquest nearby and buy one. Don't buy one online because often the aftermarket resistors don't last very long and you'll pay hell getting it warrantied. Carquest has the best aftermarket resistors and should anything happen to it they will give you a no hassle replacement.

And those are 2 7mm bolts that hold it on. Not a common socket size for people to have. Hopefully you have a 1/4 drive ratchet,short extension and 7mm socket.
This post was edited on 8/3/16 at 9:33 am
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 9:45 am to
Meaux

What is the difference in the $30 resistor and $100?

LINK

Thanks.
Posted by meauxjeaux2
watson
Member since Oct 2007
60283 posts
Posted on 8/3/16 at 9:52 am to
have no idea. I always get the BWD ones. Just ask the salesman the one most often sold to the repair shops.
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 10:06 am to
I am gonna assume since the $25 one and $105 one are both BWD I can use either. I have a 20% off coupon that is only available if I order it online thru the link in my earlier post.

Thanks for all the great info.

I do have a basic mechanics set of socket wrenches so I assume I have a 7mm, but will check at home this evening.
Posted by Wtodd
Tampa, FL
Member since Oct 2013
67482 posts
Posted on 8/3/16 at 10:45 am to
quote:

Napoleon

quote:

DIY resistor change

quote:

Thanks for the link. Definitly will try that out myself

Easy as hell to change...YouTube is your friend
Posted by Mr. Hangover
New Orleans
Member since Sep 2003
34507 posts
Posted on 8/3/16 at 10:58 am to
Lmao I have a 2005 Silverado and numbers 1&2 don't blow but 3, 4, and 5 do

Also, I can just be driving down the highway and the drivers side vents will just start blowing hot air while the passenger side still blows cold

All I have to do is turn my truck off then back on to get it to work normal again
Posted by Napoleon
Kenna
Member since Dec 2007
69049 posts
Posted on 8/3/16 at 2:02 pm to
I'm a DIYer. I do my own engine and tranny rebuilds. Can't help with mechanic, but I say any mechanic who charges more than one hour labor is cheating you.

It's likely not the fan.
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 2:06 pm to
I ordered the part and am picking it up on my way home.

Thanks to your youtube link I am pretty sure I can change the resistor motor myself.

I will post results.

Thanks.
Posted by crimsonsaint
Member since Nov 2009
37247 posts
Posted on 8/3/16 at 3:17 pm to
I have a 05 gmc. For years only 1-4 worked. 5 just turned it off.

Yesterday morning my ac went kaput. I took it to the shop and they replaced the resistor. Now 5 works again. I'm pumped. $144 was the total cost.

There was a recall on my model for faulty wiring or wiring it in a way that could lead to corrosion. I should have taken it to the shop went I got the letter but never did.
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 3:31 pm to
quote:

crimsonsaint


I am getting the part for $22 bucks at Advanced Auto Parts and per the youtube link and other online tutorials, it should take me roughly 10-15 mins.

I will report back. I will be damn happy if $22 bucks and 15 mins saves me the headache of getting my truck to the shop and spending $150
Posted by crimsonsaint
Member since Nov 2009
37247 posts
Posted on 8/3/16 at 4:03 pm to
Hope it works for you. I'm not a mechanic and my ac went out on a day when it got up to 98 degrees. I wasn't about to tinker with it myself out in that heat not even knowing where to start. Apparently $144 is a little high, but frick it I had my truck back in 2 hours and the ac was working better than it had in years.
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/3/16 at 6:20 pm to
Changed the blower resistor motor. Now all settings work except setting 4. 1-3 and 5 work. So better then previous when only setting 5 worked but still something going on. All in all i am better off now than earlier.

$50 part and roughly 30 mins of my time. Not bad.
This post was edited on 8/3/16 at 8:48 pm
Posted by ThatsAFactJack
East Coast
Member since Sep 2012
1539 posts
Posted on 8/4/16 at 8:01 am to
bump
Posted by WeagleEagle
Folsom Prison
Member since Sep 2011
1913 posts
Posted on 8/4/16 at 8:05 am to
Should've changed the plug too.
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