HVAC controls not telling blower to turn on, intermittent

[Doubeleive]

I do have access to a tech2, but mine only happen randomly for a few a seconds.

Like every drive? once a week? how often, maybe hook up the tech2 and command the fan on high and see if it changes while driving. not sure if you can drive record the fan speed
@swathdiver ?

 

[02Lightning]

Like every drive? once a week? how often, maybe hook up the tech2 and command the fan on high and see if it changes while driving. not sure if you can drive record the fan speed
@swathdiver ?

Twice in and hour drive, then not again for a week.

 

[Doubeleive]

Twice in and hour drive, then not again for a week.

unless there is a hvac code saved then that one is going to be hard to track down until whatever it is just quits period.

 

[02Lightning]

unless there is a hvac code saved then that one is going to be hard to track down until whatever it is just quits period.

Only pending code I see is a B0433, but I don't think it's related and not a hard code. Next thing I'll do is look at the plugs and try and bend some prongs for better connection.

 

[Doubeleive]

Only pending code I see is a B0433, but I don't think it's related and not a hard code. Next thing I'll do is look at the plugs and try and bend some prongs for better connection.

b0433 is the rear hot/cold blend actuator, would not affect the fan

 

[02Lightning]

b0433 is the rear hot/cold blend actuator, would not affect the fan

Yes, understood

 

[swathdiver]

Like every drive? once a week? how often, maybe hook up the tech2 and command the fan on high and see if it changes while driving. not sure if you can drive record the fan speed
@swathdiver ?

Should be able to using snapshot feature.

Have you guys checked those little aspirators in your headliner? They can get full of lint/hair and stop reading correctly which will confuse the climate controls.

 

[02Lightning]

Should be able to using snapshot feature.

Have you guys checked those little aspirators in your headliner? They can get full of lint/hair and stop reading correctly which will confuse the climate controls.

How do you go about doing that?

 

[swathdiver]

How do you go about doing that?

If asking about the aspirators, pull the little speaker covers off and have a look up in there. Use a pick, Q-tip- vacuum cleaner, etc. to clear the fan blades if they are clogged. If the fan is dead, you can drop the headliner a little and replace them from the side. @Doubeleive Wes has more experience with these than I do, I think!

 

[petethepug]

Preloved digital control panels from other vehicles do not need to be programmed if you’re going to replace it.