Question about GMC Safari
The rear heat blower does not work the front ac & heat works when it wants to when it works it works great it is like it loses all power
There is a bad connection on fan speed switch remove and check for a melted connector.
Posted on Apr 23, 2014
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Posted on Jan 02, 2017
I think that there is 2 solutions:
1. Check if there is enough gas.
2. Maybe you have to change the gas, maybe you put gas that don't fix to your car.
Posted on Jun 17, 2008
two different problems !
Rear heater problem: find under the hood where is hose for cooling liquid goes to front heating core!
you will see there also vacuum tubesgoing in to little valve ! disconnect the vaccum tubes ( engine off)
and spray in wd 40 in to the vlave ... valve is stuck and wont open flow to rear heater !
you do not have to replace tha thing . its very well made and because you dont turn this often in summer
it gets stuck. i had same problem. also make sure vacuum is working - Engine running turn rear heater on - vacuum sucks to open valve. and before that make sure fuse is ok .
for rear AC mine does not work either and it is leak on pipes that go from front to rear .. 10 feet of pipes and tubing $$ expensive repair ... forget it ... open the window...
Posted on Mar 01, 2009
The first thing I would do is check to see if a fuse is blown or bad relay. Then I would unplug the blower motor with a test light make sure you are getting power to the blower located on the far passenger side of the vehicle under the dash if it has power and good ground then suspect vaulty motor. If you are not getting power at the plug then you might have a bad switch or resister. If it does have a blown fuse remember they usually blow for a reason like faulty wiring or even a in the motor itself. I would also recommend that you change the ac cabin filters behind the glove box if they have not been changed most people neglect them on that vehicle because they are a little more difficult to change, after removing the glove box there is a metal bracket in the way of opening the cabin filter compartment. They wont cause a blower motor to not work, however they do restrict airflow to the evaporator and they protect you from pollen, dust, and even exhaust gases. Hope this helps.
Posted on Jul 08, 2009
passenger side under dash. Your going to find two clear vacuum hoses have been knocked lose "likely by someones feet." simply reconnect the vacuum hoses together . Problem solved.
The blower switch is controlled by a vacuum line..
let me know if this helps....
Posted on Aug 08, 2009
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