Heater Problem

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01-30-2007, 10:53 AM

thejoys06

Thread Starter

Join Date: Jan 2007

Posts: 2

Heater Problem

I have a 99 mustang GT and the heater will only turn on when the switch is placed on the highest speed. I was wondering if anyone had ideas on whether this would be the heater control switches or the blower motor.
Thanks for your help
Tim

01-30-2007, 02:52 PM

mariotraci

2nd Gear Member

Join Date: Dec 2006

Location:

Posts: 406

RE: Heater Problem

not sure but my grand prix has a resistor on it that make my low speeds not work. not sure if the stang has one or not but i wood check like 20 buck at auotzone,napa.

i dont think they do i looked at autozones web site good luck

01-30-2007, 02:55 PM

8banger

4th Gear Member

Join Date: Oct 2006

Location: Kentucky

Posts: 1,460

RE: Heater Problem

yeah sounds like a blower motor resistor....

01-30-2007, 02:58 PM

8banger

4th Gear Member

Join Date: Oct 2006

Location: Kentucky

Posts: 1,460

RE: Heater Problem

behind right side of dash,,in a/c heater plenum...should be pretty close to the blower motor...

02-01-2007, 05:27 PM

thejoys06

Thread Starter

Join Date: Jan 2007

Posts: 2

RE: Heater Problem

Thank you all for your help on this. It was the blower motor resistor. $15 at Ford and a 5 minute job to replace it. The fan speeds are now working perfect.