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2004 2500 HVAC modes will not switch

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Old Mar 6, 2020 | 07:56 AM
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Default 2004 2500 HVAC modes will not switch

I have no idea what it is. No matter what mode it is on, it always blows out of the main vents. Won’t blow out of any other ones.
 
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Old Mar 6, 2020 | 10:37 AM
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Is it making any noise or clicking when you change modes?
 
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Old Mar 6, 2020 | 10:46 AM
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Originally Posted by Magnoom
Is it making any noise or clicking when you change modes?
It is not. It just continues to blow out of the main vents.
 
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Old Mar 6, 2020 | 06:04 PM
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When did this start? I can't see all your door solenoids failing at once; this sounds electrical, like a fuse or failed module. Can you still vary the fan speed?
 
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Old Mar 6, 2020 | 07:39 PM
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Originally Posted by Magnoom
When did this start? I can't see all your door solenoids failing at once; this sounds electrical, like a fuse or failed module. Can you still vary the fan speed?
I can still change fan speeds/ change from AC to heat when needed. Another thing I forgot about until now, the temperature **** is also backwards. Hot is blue and cold is Red.

It started awhile ago it has just never bothered me enough to fix it until now.
 
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Old Mar 6, 2020 | 09:18 PM
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Yep, something crossed up in there...do you have access to a spare, or maybe get one out of a junkyard to see if it makes a difference?
 
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