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

oldpaddy · Aug 1, 2018

Flexpedition said:
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.

Thanks. I just looked and everything looks fine.
My wife works at a mechanic shop and her guys suggested swapping out the blower motor resistor. She's going to bring me one home tomorrow.

Oh and it stopped working this afternoon. Whatever it is it's finally getting worse. If it's not the resistor, I just hope it's not working when I send it to the shop.

JExpedition07 · Aug 1, 2018

No resistor but a Blower control module in place of one on your truck. Sounds like the problem. Some loosely call them a resistor but if you have the dual zone climate control then you have the bcm not resistor. When a resistor fails it’s mostly a problem at lower fan speeds, the blower control module can fail all over the board.

oldpaddy · Aug 1, 2018

JExpedition07 said:
No resistor but a Blower control module in place of one on your truck. Sounds like the problem. Some loosely call them a resistor but if you have the dual zone climate control then you have the bcm not resistor. When a resistor fails it’s mostly a problem at lower fan speeds, the blower control module can fail all over the board.

Would that have an effect on the rear or seats?

oldpaddy · Aug 24, 2018

It was the blower motor relay.
Thanks guys!

1955moose · Aug 24, 2018

Must have been worn contacts in the relay. Sometimes they fail completely, sometimes they nag at you, on/off like yours did. Relays start to act up after 10 years or more. I guess replacing all the main ones like a tune up would probably be logical, but who does that? Nobody I've ever known.

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fothco · Feb 18, 2019

Oh my , sooo I amnot alone : our 2013 Epee - Max has no blower working for heat . This is Canada + it's cold out . Rear heater ok . Could this be a computer glitch ? AC on , but no heat blowing in front . I see note re harness to blower motor . Where is that ? fothco

1955moose · Feb 18, 2019

The one that connects to the motor would be where I'd look! Theirs tests you can do to see if in fact it's a power to motor issue, or the motor itself bad. In most cases, it's usually a resistor or a relay/fuse that's causing no motor function. Are you any good at reading schematics?

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oldpaddy · May 21, 2019

Damn blower control module appears to have died again. Has anyone else had a problem with these bcm's dying twice within a year?

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

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