heater fan not blowing

anderson sc · December 3rd, 2010, 11:04 PM

Last owner had replace heater fan motor and said it would not blow air. He did not know why? There's no air comeing out AC or Heat vents. Hi and low speed seem to sound ok just no air movement any where?

jessemachone · December 3rd, 2010, 11:05 PM

sounds like something is blocked or not hooked up. do you think it could be going in reverse? swap the wires on it and check again.

anderson sc · December 4th, 2010, 08:13 AM

Originally Posted by jessemachone

sounds like something is blocked or not hooked up. do you think it could be going in reverse? swap the wires on it and check again.

I was thinking the same thing. about it running in reverse? Im sure the plug is made that one can't reverse it. I'll look in to it and let you know what I fine. I did remove the heater box to check for blockage that seemed ok. Thank you!

ryanw · December 4th, 2010, 11:22 AM

if its running in reverse it should be pulling air into the vents. hold a light waight piece of paper in front of the vent and see if it wants to suck the paper in. also if your filter is blocked not allowing air to enter your system then no air will come out of your ducts

FastStang91Lx · December 4th, 2010, 11:34 AM

we have no filter

ryanw · December 4th, 2010, 11:35 AM

Originally Posted by FastStang91Lx

we have no filter

what about that foam isnt that a filter

ryanw · December 4th, 2010, 12:06 PM

Okay Faststang91Lx your right...All this time i thought that foam looking thing you see when you look up under the dash at the blower housing was a filter. i just went out and looked at it, i guess its a gasket of some sort. idk. thats wierd that cars dont have filters in there forced air units. If we didnt install filters in our systems ( meaning house or apartments) the coils would be so blocked up with dirt within a year that they would no longer work and would have to be replaced, thanks for the correct info.

FastStang91Lx · December 4th, 2010, 12:20 PM

No problem, I just didn't want the dude looking for a filter that wasn't there, lol. And yes, I agree a filter would be a good idea. I guess my Tahoe has one... never looked though.

jessemachone · December 4th, 2010, 07:24 PM

Originally Posted by ryanw

if its running in reverse it should be pulling air into the vents. hold a light waight piece of paper in front of the vent and see if it wants to suck the paper in. also if your filter is blocked not allowing air to enter your system then no air will come out of your ducts

that may not be the case as that there is no where for the air to go. It is because of the fan design... it is a paddle wheel not a bladed fan. all he has to do is disconnect the fan and jump the wires in reverse.

anderson sc · December 4th, 2010, 11:07 PM

Found the wires reversed. Work's right now! The last owner had done this heater replacement himself. After he was done not only the fan did not work right but the motor would not started. Somehow he fried the computor. That was good for me it's hard to fine a tee top in this good shape. had a new motor to go in it and went to carburator. last thing's need to do is new dash cover,carpet and a starter switch don't think it will be hard to do. And back on the road she goes! Thanks too everyone for your input's always lot's of help!!

jessemachone · December 4th, 2010, 11:43 PM

sweet deal man - my first fox was going to be a t. Guy I was going to buy it from changed his mind

December 3rd, 2010, 11:04 PM	#1
anderson sc Newbie 85GT tee top,67coup,94GT NA Join Date: Dec 2008 Location: anderson sc Posts: 36 iTrader: 0 reviews	heater fan not blowing Last owner had replace heater fan motor and said it would not blow air. He did not know why? There's no air comeing out AC or Heat vents. Hi and low speed seem to sound ok just no air movement any where?

December 4th, 2010, 11:22 AM	#4
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	if its running in reverse it should be pulling air into the vents. hold a light waight piece of paper in front of the vent and see if it wants to suck the paper in. also if your filter is blocked not allowing air to enter your system then no air will come out of your ducts __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

December 4th, 2010, 11:34 AM	#5
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	we have no filter __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

December 4th, 2010, 12:06 PM	#7
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Okay Faststang91Lx your right...All this time i thought that foam looking thing you see when you look up under the dash at the blower housing was a filter. i just went out and looked at it, i guess its a gasket of some sort. idk. thats wierd that cars dont have filters in there forced air units. If we didnt install filters in our systems ( meaning house or apartments) the coils would be so blocked up with dirt within a year that they would no longer work and would have to be replaced, thanks for the correct info. __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

December 4th, 2010, 12:20 PM	#8
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	No problem, I just didn't want the dude looking for a filter that wasn't there, lol. And yes, I agree a filter would be a good idea. I guess my Tahoe has one... never looked though. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

December 4th, 2010, 11:07 PM	#10
anderson sc Newbie 85GT tee top,67coup,94GT NA Join Date: Dec 2008 Location: anderson sc Posts: 36 iTrader: 0 reviews	Found the wires reversed. Work's right now! The last owner had done this heater replacement himself. After he was done not only the fan did not work right but the motor would not started. Somehow he fried the computor. That was good for me it's hard to fine a tee top in this good shape. had a new motor to go in it and went to carburator. last thing's need to do is new dash cover,carpet and a starter switch don't think it will be hard to do. And back on the road she goes! Thanks too everyone for your input's always lot's of help!!

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