If you shop at Amazon.com (for anything), use this link to help support FordF150.net!

Looking for recent topics?

Power to Climate Control

fairview
New Member
New Member
Posts: 9
Joined: Tue Dec 09, 2008 3:40 pm
Location: TX
My Truck Mods

Power to Climate Control

I think I've just about read every thread on heater problems and I haven't found mine. I do not have power coming into the climate control switch. I've checked all my fuses and even changed the fuse that controls the blend door/heater/ac with a known good one. What feeds power to the switch? I'm about to give up and just go with an auxillary heater for the winter. (1997 F150)

Thanks in Advance

fairview
New Member
New Member
Posts: 9
Joined: Tue Dec 09, 2008 3:40 pm
Location: TX
My Truck Mods

Post by fairview »

That was a good link. I've checked those fuses and checked all of them. I'm wondering if the actuator feeds power to the switch through a resistor and then it goes back to the actuator?

RkyMtnHi
Hardcore Ford Truck Fanatic
Hardcore Ford Truck Fanatic
Posts: 4596
Joined: Sat Aug 21, 2004 6:58 pm
Truck: 1999 F-150 4X4 -5.4
Location: Denver, Colorado
My Truck Mods

Post by RkyMtnHi »

Specifically what problem are you having? According to the Haynes manual, the blower motor is switched on the ground side. The power goes direct to the Blower Motor Resistor Assembly. I believe the rest is controlled by vacuum.

fairview
New Member
New Member
Posts: 9
Joined: Tue Dec 09, 2008 3:40 pm
Location: TX
My Truck Mods

Post by fairview »

I looked at the wiring diagram in the link again. I could not see it last night. I guess too frustrated with being cold. Looking at it again, power is fed to the blend door actuator, then to the cliamte control switch and then back to the actuator. I suspect the blend door is broken but I really can determine that until I get power to the actuator.

projectsho89
Hardcore Ford Truck Fanatic
Hardcore Ford Truck Fanatic
Posts: 4194
Joined: Mon Jun 19, 2006 10:13 am
Truck: 2001 F250 V10 4X4
Location: St Louis Area
My Truck Mods

Post by projectsho89 »

The blend door is electrically controlled, the airflow doors are vacuum controlled.

RkyMtnHi
Hardcore Ford Truck Fanatic
Hardcore Ford Truck Fanatic
Posts: 4596
Joined: Sat Aug 21, 2004 6:58 pm
Truck: 1999 F-150 4X4 -5.4
Location: Denver, Colorado
My Truck Mods

Post by RkyMtnHi »

projectsho89 wrote:The blend door is electrically controlled, the airflow doors are vacuum controlled.

Thanks for the correction Steve. I misunderstood the schematic.

fairview
New Member
New Member
Posts: 9
Joined: Tue Dec 09, 2008 3:40 pm
Location: TX
My Truck Mods

Post by fairview »

Yahoo!!! I have heat. I picked up a new actuator from Ford after work today and installed it. Steve, the wiring diagram was a life saver. It eliminated the guess work about power distribution. A new actuator solved the problem. Thanks!!!!!!!!

projectsho89
Hardcore Ford Truck Fanatic
Hardcore Ford Truck Fanatic
Posts: 4194
Joined: Mon Jun 19, 2006 10:13 am
Truck: 2001 F250 V10 4X4
Location: St Louis Area
My Truck Mods

Post by projectsho89 »

You're welcome!

Glad to help.

Steve

fairview
New Member
New Member
Posts: 9
Joined: Tue Dec 09, 2008 3:40 pm
Location: TX
My Truck Mods

Post by fairview »

Well my success didn't last that long. I did have a dead actuator and I did get great heat the first couple of times but now I can hear the actuator moving/grinding and I have luke warm heat so I guess it is the blend door. Crap!!!

Who is online

Users browsing this forum: No registered users and 2 guests