Another AC problem - Off-Road Forums & Discussion Groups
Ford 67-96 F-Series, 78-96 Bronco All discussions of 67-96 F-Series Trucks and 78-96 Broncos

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 07-29-2002, 11:56 AM
Posts: n/a
Another AC problem

Is there a switch that controls the blower speed for the AC other then the speed switch on the AC controls. The problem is, I have the fan set to high and while I drive aprox 1500 RPM the fan speeds up and slows down. At an idle it is slow.Should I look at replaing the blower or is it a sensor?
Sponsored Links
post #2 of (permalink) Old 07-29-2002, 06:18 PM
Mud in my Veins
Steve83's Avatar
Join Date: Dec 2000
Location: Memphis, TN
Posts: 5,301
Thanks: 0
Thanked 0 Times in 0 Posts
Fan speed

The fan is powered directly thru that switch to the resistor plate installed thru the airbox in the engine compartment then to the fan motor. Check your wiring diagram and make sure you have a good ground. (I think it's inside the dash near the radio.[img]images/icons/crazy.gif[/img]) The resistor plates crack occasionally, and they can also burn if you get leaves in the wiper cowl. You can pull it by just removing the 2 screws that hold it, and pull it out gently by the wires. While you have it out, pull the blower motor and test it by running power directly to it. Then clean the ducts & A/C evaporator core thoroughly before you reinstall the blower & resistor.

This is the resistor plate:
Steve83 is offline  
post #3 of (permalink) Old 07-29-2002, 06:49 PM
Join Date: Jul 2002
Posts: 908
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Another AC problem

could this be an alternator problem do you notice you headlights doing the same thing or is just the fan
80BRONCO is offline  
Sponsored Links
post #4 of (permalink) Old 07-29-2002, 10:00 PM
Posts: n/a
Re: Another AC problem

Now that you mention it. I see the light dim when I stop at a light. Also with the AC on high the voltage show's a little in the red when stopped. When I go it moves a little above the red into the ok side. I havn't read the actual; voltage but it might be a good idea. This only happens when I have the ac running.
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome