2012 nissan Quest. on start up the blower runs on high in front and back. the climate control wont turn off , up or down. blowing in back as well.

SOURCE: A/C BLOWER WILL NOT TURN

HI...
The problem on your vehicle is .
THE BLOWER MOTOR RESISTOR..
when they come damaged the blower motor not work. or don't stop working.
just REPLACE the RESISTOR. and you will fix that problem.
I'm a mechanic for a few years. and have autorepair software
On my PC.

OK... I hope with this information you will fix the problem.

Thank's for use fixya.

SOURCE: climate control not working

I had the same problem on my 2004 GMC Yukon XL.
Still under warranty the shop was able to reprogram the climate control system and tell what was wrong rather quickly with a OBD computer.
That’s when they found both of the climate control (driver and passenger) side actuators were bad and the control unit that tells the actuators where they should be was also bad.
The truck was in the shop with most all the dash, seats, consol, and steering wheel out for a week. The cost was over $1200.00.
That has seamed to fix the problem. Good Luck.

Marvin

• 85242 Answers
• Posted on Feb 26, 2009

SOURCE: Location of the blower motr control module

replace the blower motor speed control module, that is the only cause of this problem that I know of, and u are about the 20 post for this issue that I have read, it has fixed the other ones..

SOURCE: new climate control unit but when on blower not working for heat or ac

I'm assuming the problem is the blower motor isn't coming on or working. 1st, check the fuse. 2nd, remove the glove box or pull the 2 tabs that act like stops when it's open ( the glove box will open out further) and you'll see the power plug connector for the blower unit. Turn on the blower through the climate control (heat, A/C, or whatever) and wiggle the connector to see if the blower turns on. If starts working, then an easy solution is pull the connector off and gently press the prongs together or inward. Then carefully reconnect with damaging the prongs. This worked for 96 Mark VIII due to the fact the prongs were not "seating" correctly in the female connector. It's been about 2 years since I did this and the connection is still good. If wiggling the plug doesn't work, pull the plug, turn on the climate control (heat, A/C), and check for voltage to the plug. That's about all I can help with.

SOURCE: 2002 Dodge Durango

Replace blower motor resistor same thing happend to my buddys durango. Good luck