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Jimmy air blend motor?

10 messages,  Last post on Jul 28, 2009 at 6:08 PM

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What is this discussion about? Chevrolet Blazer, GMC Jimmy, Oldsmobile Bravada, SUV

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#5 of 10 Re: air blend motor? [jimmy99slt] by repairdog Jun 14, 2007 (1:29 pm)
Replying to: jimmy99slt (Jun 14, 2007 6:57 am) If the rad tubes are clogged you still may get the heater core to flow. As for the seat I pulled the fuse on mine but it also operates the lumbar so set it right before you take the fuse out and yep - crappy location and not a hard push to turn on - great here in FL!
#6 of 10 One Hot Truck by jimmy99slt Aug 13, 2007 (1:02 pm)
Replying to: jimmy99slt (Jun 13, 2007 11:06 pm) o.k. I'm certain it'll be the last gm i ever buy. I'm hoping someone can help. I haven't heard the clicking noise since I originally posted this. Heater core flows fine, dash button operated door (right) behind glovebox switches fine. The other door (left) will switch when vacuum is applied, but I have no clue what is supposed to cause it to automatically shift. Bypass heater and A.C. will leave icecubes on your nose. Water flows through the heater core, and all you get is hot air all the time, even when turned off. I have had the heater core bypassed, but the other night in the fog i really needed defrosters. It would be nice to be able to choose hot or cold from inside the truck. The local GMC dealer is hopelessy lost, and wants more to fix it than I paid for the truck.
#7 of 10 Re: air blend motor? [jimmy99slt] by chgoblazer Jan 21, 2008 (8:58 pm)
Replying to: jimmy99slt (Jun 13, 2007 11:06 pm) I have a 2000 blazer ( i believe the same ) Mine blew cold and lukewarm. When I set the blower speed and temp, it blew 100 degrees. For some reason when I put it on auto and recirculate, it blew hotter.118* degrees.   Get a cheap temp. gauge fro the auto parts store, looks like a meat thermametor   There is s temp sensor deep in the middle vent, blow compress air in the vent, not too much pressure. Blow off dirt dust off the sensor.
#8 of 10 Re: air blend motor? [repairdog] by snowlover4u200 Mar 18, 2008 (12:50 pm)
Replying to: repairdog (Jun 14, 2007 3:31 am) Is there any esay way to get at the bled motor? I cant seem to get my hands in there to remove it. Any help would be great. Thank you Dan snowlover4u2005yahoo.com
#9 of 10 Re: air blend motor? [jimmy99slt] by trialanderror Mar 18, 2008 (5:19 pm)
Replying to: jimmy99slt (Jun 13, 2007 11:06 pm) I have a 1999 GMC Jimmy. I replaced the thermostat and get engine temps of about 190 degrees F. I replaced the radiator last year. What do I need to do to get hot air out of my vents? It started by giving me about 100 degrees F when set at the warmest temp setting. Now I get about 50 degrees F. This is when it is 35 outside. I used to get the clicking behind the glove box. I haven't heard it for a while. Where is the vacuum line I need to check? How do I get to the air blend motor? Where should I start addressing the problem.   Freezing my behind in Michigan. Actually, the heated seat is all I have to keep me from freezing.
#10 of 10 rbaumgras by rbaumgras Jul 28, 2009 (6:08 pm)
Because the Main Gear in the Blend Motor has cracked and is now not turning the heat/cold door to the Cold position. 3 fixes: Buy a new Blend motor, takes about 5mins to replace. Buy a new Blend Motor Gear, will take about 30mins to fix. Repair current gear with Epoxy, takes about 30mins and 12hrs for the glue to set up strong enough to use it.    http://wiki.answers.com/Q/Why_would_your_98_GMC_Jimmy_blow_hot_air_even_when_the- - _temperature_gauge_is_set_to_cold    Hope this helps. Have not checked my Jimmy yet but I have the same problem. Will check it out tomorrow but this sounds like the real fix.

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