Blower Motor? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

87Silvy · 05-28-2004, 12:02 AM

If I install a new blower motor, will it increase the air output for the A/C? It just doesn't seem like it is blowing hard enough, even on high. I have to turn it to Max to really feel some air.

Radke · 05-28-2004, 01:59 AM

Check to see if there is not somethig inside a c box blocking air flow you can take motor back out and stick you hand in there and check. this sounds funny but if your hand to big if you have kids tell one to reach in and see. sounds like in plugged in there and not enought air getting throught

GMC Jim · 05-28-2004, 06:16 AM

Dunno about the '87 model...but there were 2 blower motors avaialable for the '71. The one for air cond would put out about twice the volume...

Prerunner1982 · 05-28-2004, 10:32 AM

might check the switch itself, mine has gone out twice. right now it has off and HIGH... no in the middle.

PHOENIX · 05-28-2004, 12:41 PM

Im with Jon check/replace the switch.
Mine did the same thing, only had off and high (low and med, were like nothing) and high wasnt as high as high should have been. I ended up replacing the entire heater control panel because mine was modified for aftermarket a/c. When I put the new heater control in it came with a new switch and the heater blower motor worked much better.

Prerunner1982 · 05-28-2004, 01:09 PM

try taking a wire from the battery to the blower, to see exactly how hard it should blow. the turn it on at the switch and see...

05-28-2004, 12:02 AM	#1
87Silvy Registered User Join Date: Sep 2003 Location: North Texas Posts: 326	Blower Motor? If I install a new blower motor, will it increase the air output for the A/C? It just doesn't seem like it is blowing hard enough, even on high. I have to turn it to Max to really feel some air. __________________ 1987 Chevrolet Silverado 2005 Chevrolet Silverado

05-28-2004, 06:16 AM	#3
GMC Jim Senior Member Join Date: Dec 2002 Location: Portland, Oregon Posts: 901	Dunno about the '87 model...but there were 2 blower motors avaialable for the '71. The one for air cond would put out about twice the volume... __________________ '71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal).

05-28-2004, 12:41 PM	#5
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Im with Jon check/replace the switch. Mine did the same thing, only had off and high (low and med, were like nothing) and high wasnt as high as high should have been. I ended up replacing the entire heater control panel because mine was modified for aftermarket a/c. When I put the new heater control in it came with a new switch and the heater blower motor worked much better. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION * Last edited by PHOENIX; 05-28-2004 at 01:15 PM.

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05-28-2004, 01:59 AM	#2
Radke Registered User Join Date: Apr 2004 Location: Seward Ne. Posts: 50	Check to see if there is not somethig inside a c box blocking air flow you can take motor back out and stick you hand in there and check. this sounds funny but if your hand to big if you have kids tell one to reach in and see. sounds like in plugged in there and not enought air getting throught

05-28-2004, 10:32 AM	#4
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	might check the switch itself, mine has gone out twice. right now it has off and HIGH... no in the middle.

05-28-2004, 01:09 PM	#6
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	try taking a wire from the battery to the blower, to see exactly how hard it should blow. the turn it on at the switch and see...



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