- #688 of 791
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Re: 2004 Chevy Silverado A/C [0patience]
by wornout59
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Oct 06, 2007 (7:44 am)
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Replying to: 0patience (Oct 05, 2007 3:59 pm)
Thanks for the tips. Its a manual dual control which of course is silly since the passenger is only 18 inches away so I do not think sync is the answer since the controls work independently and flawlessly when repeatedly checked. The heated hot air blows out of the drivers side randomly & without warrning with the air on or off, at that time the drivers side temp contol is useless. This is south florida so the slide switch is normally always at the bottom (cold setting). Only turning off the engine and restarting will reset the sytem to normal operation. I spoke to another service tech at a GMC dealer yesterday who indicated that 99% of the time its the temp actuator. Any thoughts?
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- #689 of 791
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climate control help Gmc
by biggiedave1
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Oct 07, 2007 (5:11 am)
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hi all,
climate control help GMC Denali, when I set temp fan blows on high and doesn't slow down when temp is reached also only blows cold unless temp is set to 90 degrees, actuators zones appear to be working fine. temperature sensor? if so where is it? thanks please help dealer wants big bucks to fix.
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- #690 of 791
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Re: climate control help Gmc [biggiedave1]
by wornout59
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Oct 07, 2007 (8:46 am)
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Replying to: biggiedave1 (Oct 07, 2007 5:11 am)
A parts tech for Chevy told me that the green board with metal contacts run thru was what controlled the fan speed. It is easily located in front of the blower fan. where passengers right foot wound be. Remove AC shroud first only 2 screws to remove board 4 for shroud. I would take that part to a dealer to confirm but order online to save 50% or more, do a parts search & compare $. the tech also said it was a common failer.
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- #691 of 791
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Re: climate control help Gmc [wornout59]
by biggiedave1
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Oct 07, 2007 (11:38 am)
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Replying to: wornout59 (Oct 07, 2007 8:46 am)
i can manually reduce speed, it goes to hi on auto mode and will not reduce fan speed when temp is achieved and again only blows warm air when thermostat is set at 90.
any suggestions?
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- #692 of 791
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Re: climate control help Gmc [biggiedave1]
by wornout59
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Oct 12, 2007 (1:51 pm)
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Replying to: biggiedave1 (Oct 07, 2007 11:38 am)
Should be the same board I was refering to. I think it detects the tempeture and when set temp. is reached it drops the fan speed down. I do not have the auto temp. so I haven't got that problem. Good luck
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- #693 of 791
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Re: Only hot air blowing out of vents on Nissan Sentra 2000 [Mr_Shiftright]
by bahjatkalandos
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Oct 17, 2007 (7:13 pm)
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Replying to: Mr_Shiftright (Jun 11, 2005 5:27 pm)
 Mr Shiftright,
I have 2005 nissan sentra with the same problem. these days are kind of cold mornings, so I turned the knob to the heater, when in the afternoon tried to run the A/C by turning the knob to cold, I still get hot air.
It looks like the heat/cold valve is stuck on the heat.
Do you have update on your car situation, I mean did you figure it out what exactly was the problem.
Thanks for any update you provide
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- #694 of 791
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Re: 2004 Chevy Silverado A/C [wornout59]
by sdmcarlson
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Oct 17, 2007 (7:52 pm)
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Replying to: wornout59 (Oct 06, 2007 7:44 am)
I have the exact same problem. 2004 Silverado. With AC on (or even just the vent) I will get very hot air blowing from the drivers side vents only. And, as you said, must re-start the vehicle to "re-set". Did you find what the problem was exactly and what was the part name/number?
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- #695 of 791
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Re: Only hot air blowing out of vents on Nissan Sentra 2000 [flasentra]
by bahjatkalandos
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Oct 17, 2007 (8:02 pm)
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Replying to: flasentra (Jun 09, 2005 2:27 pm)
I have 2005 nissan sentra with the same problem. these days are kind of cold mornings, so I turned the knob to the heater, when in the afternoon tried to run the A/C by turning the knob to cold, I still get hot air.
It looks like the heat/cold valve is stuck on the heat.
Do you have update on your car situation, I mean did you figure it out what exactly was the problem.
Thanks for any update you provide. 
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- #696 of 791
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Re: 2004 Chevy Silverado A/C [sdmcarlson]
by wornout59
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Oct 20, 2007 (4:42 am)
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Replying to: sdmcarlson (Oct 17, 2007 7:52 pm)
I think its fixed a couple more weeks to be certain. Two weeks ago I replaced the drivers side temp actuator GM part # 89018365, it was just under $200 with tax from the dealer. You can get it thru www.gmpartsdirect.com for almost half that price now that you have the part #. Take off the duct shroud ( 4 screws ) and the actuator is right above the hump in the floor, only 2 screws & pull down. You can fell the spindel or shaft that connets to to flapper that lets in the heated air, open and close manually with your finger tips an you can hear it open & close. Line that shaft to the opening in the actuator and reinstall the 2 screw. I plugged the new one in first and started the truck to watch the actuator turn to the close flap position (no heat) which is what I had manually put the flap in. It was a very simple job 10-20 minutes. I like to know what the dealer would have charged, probably pretty high. I also found out when I got the part that their are 3 or 4 actuators in that system. The passengers side is above the drivers at the top side or the duct (under top of dash), hope that one never goes, and theirs one for recirculation door and I think their is one more somewhere in their. hope this helps.
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- #697 of 791
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heater motor
by mikpalm
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Oct 21, 2007 (10:00 am)
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I have 95 aaccord ex etec engine. The heater fan motor just quit. After checking i've found the motor if ok, the swithch has power. The schematic in the manual says there is a rheostat and a relay for this motor. Any one know where these are located? or other sugesstions?
thanks mikpalm
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