A/C fan blower not blowing on high?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roughedup72 · 06-23-2006, 12:23 PM

Hey yall, I'm posting this question here because my van is a 92 and has the same a/c control panel as the 87 trucks. Heres my problem, when the fan switch is in the high setting the fan doesnt blow, when it is in all the other settings it blows the way its supposed to. Is it my fan or my switch?

i need your responses on this one because I need the A/C on high to cool the whole inside. Thanks in advance.

cliffsta · 06-23-2006, 09:03 PM

Fan Switch in the HVAC control panel, that's what my problem was. Changed the switch and I got my HIGH back.

Some people tell you all this crap about the wiring and how HIGH is on a different wire... but just change the switch first, they're cheap (both in price and quality, which is why it probably is borken) and then if you still have the problem, go with the whole, "other" train of thought, that someone else will have to explain.

Good luck

magnethead · 06-24-2006, 01:22 AM

yup try switch first..

jimfulco · 06-24-2006, 02:40 AM

If it has a relay for high speed, wiggle the wires on it and see if it turns on. If not, bypass it and see if it works. If so, replace the relay.

roughedup72 · 06-24-2006, 09:26 AM

Thanks guys. I was hoping it was just the switch, I will be replacing it soon.

gchemist · 06-25-2006, 07:30 PM

Bet on the relay. $7 or less

roughedup72 · 06-26-2006, 08:16 PM

Its the relay!! I went to the salvage yard today and bought the whole control panel because they didnt wont to seperate the switch from it ( cant say that I blame them) so I put it in this afternoon and same problem.found the relay and tested to see if I had power there and it was, tested relay and theres the problem. Now I need to find a relay. Thanks again for yoour help. Now to find out whats wrong with the passenger side power window, Thats going to be another thread.

gchemist · 06-27-2006, 12:28 AM

You can buy a relay at any parts store. Just ask for an A/C Delco catalogue. Last one cost me $6 and change.

roughedup72 · 06-27-2006, 09:04 AM

Thanks.I will do that today.

roughedup72 · 07-07-2006, 07:05 PM

Damn!!! and I thought it was the relay. I replaced it with a new one and still have the same problem. Any other Ideas?

06-23-2006, 12:23 PM	#1
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	A/C fan blower not blowing on high?? Hey yall, I'm posting this question here because my van is a 92 and has the same a/c control panel as the 87 trucks. Heres my problem, when the fan switch is in the high setting the fan doesnt blow, when it is in all the other settings it blows the way its supposed to. Is it my fan or my switch? i need your responses on this one because I need the A/C on high to cool the whole inside. Thanks in advance. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

06-23-2006, 09:03 PM	#2
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	Re: A/C fan blower not blowing on high?? Fan Switch in the HVAC control panel, that's what my problem was. Changed the switch and I got my HIGH back. Some people tell you all this crap about the wiring and how HIGH is on a different wire... but just change the switch first, they're cheap (both in price and quality, which is why it probably is borken) and then if you still have the problem, go with the whole, "other" train of thought, that someone else will have to explain. Good luck __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

06-24-2006, 01:22 AM	#3
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: A/C fan blower not blowing on high?? yup try switch first..

06-24-2006, 02:40 AM	#4
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Re: A/C fan blower not blowing on high?? If it has a relay for high speed, wiggle the wires on it and see if it turns on. If not, bypass it and see if it works. If so, replace the relay.

06-24-2006, 09:26 AM	#5
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: A/C fan blower not blowing on high?? Thanks guys. I was hoping it was just the switch, I will be replacing it soon. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

06-25-2006, 07:30 PM	#6
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: A/C fan blower not blowing on high?? Bet on the relay. $7 or less

06-26-2006, 08:16 PM	#7
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: A/C fan blower not blowing on high?? Its the relay!! I went to the salvage yard today and bought the whole control panel because they didnt wont to seperate the switch from it ( cant say that I blame them) so I put it in this afternoon and same problem.found the relay and tested to see if I had power there and it was, tested relay and theres the problem. Now I need to find a relay. Thanks again for yoour help. Now to find out whats wrong with the passenger side power window, Thats going to be another thread. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

06-27-2006, 12:28 AM	#8
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: A/C fan blower not blowing on high?? You can buy a relay at any parts store. Just ask for an A/C Delco catalogue. Last one cost me $6 and change.

06-27-2006, 09:04 AM	#9
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: A/C fan blower not blowing on high?? Thanks.I will do that today. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

07-07-2006, 07:05 PM	#10
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: A/C fan blower not blowing on high?? Damn!!! and I thought it was the relay. I replaced it with a new one and still have the same problem. Any other Ideas? __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.



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