Heater a/c fan does not work on my 1990 Olds touring sedan

SOURCE: electrical problem with heater on 1990 isuzu trooper

heater fan does not respond to control. I tested the control switch, it is good. Fan motor is good it works with direct connection to battery. fuse is good. Can't find the problem. check the relay they are good checked the resistor it's good but no power the switch can you help thanks

SOURCE: heater switch for 1990 toyota celica

heater is not trun on but the light in the heater painel is on can you help

Gilbert Labont?

• 195 Answers
• Posted on Jul 13, 2009

SOURCE: 2006 grand cherokee laredo heater fan only works

It is NOT the motor itself in this case, it is the blower motor's resistor pack, which was and seems still is a common problem with the grand cherokees. It is usually located under or behind the glove box right on the firewall, and some rarer cases under the hood, also on the firewall but on the hood side and not the inside of the vehicule, next to the blower motor assembly. In your case it should be located inside the vehicule and requires removal of the glove box according to a few tech experts on the web. Here is the section of tech info i have found which i think will be the most useful for you:

"Get to the blower motor in a Grand Cherokee by first disabling the airbags. Unscrew the glove box and remove it. Unscrew and remove the blower motor wire harness found directly behind the blower motor. Unscrew three screws holding the blower motor into place and then remove the motor."

So I hope this helps you out.

SOURCE: 92 olds 98 touring sedan w/ 3.8 sc. My a/c was

If you have Ruled OUT Fuses-Relays And Remote A/C Control Modual then The FACE MODUAL Itself, The Unit that is In The Dash that you program temp to is BAD.

SOURCE: the heater in my 1990 olds wont heat up we checked

Here's a couple of other things to check;
Make sure heater control valve is working - feel the heater hoses w/heater on. Both hoses should feel warm/hot. Test or replace your radiator cap - it may fit tight but they do lose their ability to hold adequate pressure. Make sure fan belt is tight and not glazed - loose or glazed belts will slip through waterpump pulley not spinning waterpump at correct rpms