Only my defrost setting works, won't change to other settings. Heat and a/c work fine. Please help!

Nick51786 · by **Nick51786** [OP] » Jul 11 2012, 6:02am

Related Topics ac/heater stuck on defrost stuck in defrost mode......VERY HOT!!!! silverado key is stuck and ignition is lock-please help Rear Defrost No A/C With defrost when temp below 32 degrees. Odd Defrost Issue Air will only come out of the defrost vent! Defrost/ Defog Bottons Defrost stays open How long does it take to defrost the windows 2011 2500HD Duramax Heating / Defrost Replaced mode actuator but still comes out defrost CD Stuck Stuck...

xMOWERYx · by **xMOWERYx** » Jul 11 2012, 9:45am

Its the electric solenoid that switches a rubber paddle to change the direction of air flow. Either that or your switch itself is messed up.

allterrainjoe · by **allterrainjoe** » Jul 11 2012, 12:20pm

^^^ What he said. Defrost is the default setting when something goes wrong. I also remember something about a vac. hose but I can't remember if it was to do with your problem.........

Machster69 · by **Machster69** » Jul 11 2012, 12:22pm

+1 on actuator/solenoid

Nick51786 · by **Nick51786** [OP] » Jul 11 2012, 12:39pm

Thank Is this a difficult task to do on my own or am I better off taking it to the shop?

xMOWERYx · by **xMOWERYx** » Jul 12 2012, 1:01am

Well depends on how much electrical work you have done. It would basically consist of you getting underneath your dash and taking some plastic covers off. If you got small hands it's pretty easy. But for me since all the plastic clips and pieces break if you don't know how to disassemble them or reassemble them, I'd just take it to someone it might cost you 100 bucks parts and labor depending on how fast your mechanic can get it done.

Nick51786 · by **Nick51786** [OP] » Jul 12 2012, 7:04am

I have the newer body style 99 not the older one does this make a difference ?

xMOWERYx · by **xMOWERYx** » Jul 12 2012, 11:36am

Probably not, they didn't make any major changes in the ducting. But I found a video that will show you a step by step procedure for your make and model truck! http://www.youtube.com/watch?v=_Suo7gNvLTM

Nick51786 · by **Nick51786** [OP] » Jul 14 2012, 12:43am

Thank you plan on tackling this tomorrow

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Only my defrost setting works, won't change to other settings. Heat and a/c work fine. Please help!

99 silverado stuck on defrost

99 silverado stuck on defrost

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99 silverado stuck on defrost

99 silverado stuck on defrost

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99 silverado stuck on defrost

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