HVAC controls not telling blower to turn on, intermittent

[hillstrubl]

if any of you have a tech2 you could try commanding the fan on when this happens if it does not respond or does respond but the controller won't change it alone. then I would certainly suspect the controller.
also check for any hvac system codes. blend door feedback codes are very common but most likely not the issue in this case.
you could also maybe check and see what the comanded state of the fan is versus actual. (if there is such a option in the tech2)
mine is in the shop for a couple more days so I can't offer much more help at the moment.

***also I assume all of you have the digital control? or is this happening with the manual controls also?

I don't have a tech2 unfortunately

A digital control pannel will need programed to work.

Dorman's is claiming it doesn't? Any truth to that? part is 599-142


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Is there any chance the HVAC control panel is ok and its the blowers that aren't waking up?

 

[Doubeleive]

6-months later....... lol probably getting cold now eh

 

[hillstrubl]

6-months later....... lol probably getting cold now eh

Its intermittent, maybe 1 out of ever 10 times I drive it. When it does happen a bump within the first 10-15 min of driving usually wakes it up.

Only 1 time so far have I been able to get it to wake up.

 

[Doubeleive]

Its intermittent, maybe 1 out of ever 10 times I drive it. When it does happen a bump within the first 10-15 min of driving usually wakes it up.

Only 1 time so far have I been able to get it to wake up.

Hmma.ybe try cleaning the harness connector