'14 limited expy front AC/heat shutting off and then comes back on

[oldpaddy]

Hi all, I have this weird problem that started today with my blower/ac/heat. The ac shut off then after a minute comes on for one second and then shuts off for another minute. It does this like 5 times and then it stays on for a while. No lights, sounds, blinking. Nothing. The control unit says everything is on, but nothing comes out of the vents. The rear and my ac seats work. Same thing with the heat.
Any ideas?

 

[stamp11127]

Sounds like the blower motor control. Check the connection at the blower first before changing parts.
If you have a meter you can check for voltage at the plug.

 

[oldpaddy]

An update on my blower problem. It hasn't happened since the day I started the thread.
Very odd if you ask me.

 

[Plati]

That's it with intermittent problems, eh? Sounds real and it will come back. It wasn't your imagination.

I'm in a hotel in Sarasota now. Called maintenance up for a problem with the air conditioner making noise. Seemed odd. I told them I would try to get more info. Went back later and said it was the refrigerator not the a/c! Those damnn hotel fridges always make noise!

 

[oldpaddy]

Ugh. It's 90f out and the problem is back. First time since my last mention of it.

 

[Plati]

Wild guess, take this with grain of salt. Not uncommon for electric devices to have overtemp protection. We had a blower motor in a Xerox scanner that would shut off in overtemp and reset and run after it cooled a bit. It was unpredictable.

 

[oldpaddy]

Wild guess, take this with grain of salt. Not uncommon for electric devices to have overtemp protection. We had a blower motor in a Xerox scanner that would shut off in overtemp and reset and run after it cooled a bit. It was unpredictable.

I was wondering that myself. After an hour or so of driving it started working fine. It's a black truck and gets crazy hot in this sun.

 

[oldpaddy]

And now it's not working.

 

[oldpaddy]

And today it works.
I hate intermittent problems.

 

[Flexpedition]

Take a few minutes whether its working today or not and unplug the harness that powers the blower motor. Look to see if the male & female plastic connectors show any sign of melting, if the brass-ish spades are discolored, or if the larger wires have signs of heat damage, such as discoloration or decreased flexibility.