Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150
Sign in using an external account
Register Forgot Password?


1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage SPONSORED BY:

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-29-2003, 04:09 PM
ISPF150's Avatar
ISPF150 ISPF150 is offline
New User
 
Join Date: Jun 2003
Posts: 11
ISPF150 is starting off with a positive reputation.
99 F150 Heater Control Problem?

Here is my problem, I hope someone can help me out on this. On the first hot day this year I finally turned my heater control from hot to cold to run the AC, but it still came out hot? I said what the @#%@! I didn't know what was up so in a desperate plea for some cold air I had my buddy kick his feet under the dash. Presto Cold Air!!!! Now that it is getting colder I went to put my heat control to hot, and no hot air? Tried the old kick again but it is not working. Could something be stuck somewhere preventing my hot / cold air flapper (if thats what you would call it) from flapping? I really don't want to have the dealer charge me mega bucks for something small.
Reply With Quote
  #2  
Old 09-30-2003, 12:21 AM
Racerguy's Avatar
Racerguy Racerguy is offline
Super Moderator
 
Join Date: Aug 2002
Location: BC, Canada
Posts: 12,667
Racerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to behold
Any chance it is just the **** not turning the shaft on the temp control? These crack pretty easily.
__________________
Dave - FTE moderator
Forum Guidelines
this space for rent
Reply With Quote
  #3  
Old 09-30-2003, 08:35 AM
ISPF150's Avatar
ISPF150 ISPF150 is offline
New User
 
Join Date: Jun 2003
Posts: 11
ISPF150 is starting off with a positive reputation.
I am pretty sure its not the ****. It has never been off, and it still stops when it is turned all the way hot or cold, but I am going to check it right now just to be sure. I noticed that the heat selector switch is electronic, is there any way to diagnose the switch itself with a multimeter?
Reply With Quote
  #4  
Old 09-30-2003, 10:21 AM
ISPF150's Avatar
ISPF150 ISPF150 is offline
New User
 
Join Date: Jun 2003
Posts: 11
ISPF150 is starting off with a positive reputation.
Update.... I just went out to diagnose my problem. Switch looks good. I started to take apart the under dash on the passengers side and I gave it a hit with my hand, and presto! Heat! I think that the flapper / blender or whatever its called is getting stuck. Maybe it needs some lube. Anybody know where the flapper is so I can take it apart and lube it up?
Reply With Quote
  #5  
Old 11-02-2003, 10:48 AM
Idezyne4u Idezyne4u is offline
New User
 
Join Date: Nov 2003
Posts: 4
Idezyne4u is starting off with a positive reputation.
My '99 F150 gave me a nice, ice cold surprise as the weather turned this week to COLD>>>>>
I would turn my temp control **** and it SEEMED to be working as it stopped on the red side and stopped on the blue side when I turned it either way. It looked normal, and hey, it sure worked for AC settings this summer...
Well, after freezing all week I figured I would yank the **** to start at the cheapest place to fix first and Viola' the white plastic shaft the **** sits on is stripped almost round and not demilune as it should be. (half barrelled)
Some teflon tape fixed this issue after I marked shaft with marking pen to see where I started before turning it , turned it with the needle nose pliers to the "hot" side and replaced **** accordingly.
You may check this first, it is worth fighting the **** to get it off the shaft and fix this for next to nothing.
~ Victoria
Reply With Quote
  #6  
Old 11-02-2003, 11:02 AM
Racerguy's Avatar
Racerguy Racerguy is offline
Super Moderator
 
Join Date: Aug 2002
Location: BC, Canada
Posts: 12,667
Racerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to behold
Hi Idezyne4u and welcome to FTE

It's nice when a simple fix works. Now if only they were all that easy.
How cold is it where you are?
__________________
Dave - FTE moderator
Forum Guidelines
this space for rent
Reply With Quote
  #7  
Old 11-02-2003, 11:11 AM
Idezyne4u Idezyne4u is offline
New User
 
Join Date: Nov 2003
Posts: 4
Idezyne4u is starting off with a positive reputation.
well today it is about 55 dgress ( for Ca. it is cold) considering we were 90 dgrees Monday and now we can expect snow tonite
Reply With Quote
  #8  
Old 11-02-2003, 11:16 AM
Racerguy's Avatar
Racerguy Racerguy is offline
Super Moderator
 
Join Date: Aug 2002
Location: BC, Canada
Posts: 12,667
Racerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to behold
brrrrrr
lol
It is sitting at about 25 here right now with not a cloud in the sky
__________________
Dave - FTE moderator
Forum Guidelines
this space for rent
Reply With Quote
  #9  
Old 11-07-2003, 10:27 AM
Kev4OSU Kev4OSU is offline
New User
 
Join Date: Nov 2003
Posts: 1
Kev4OSU is starting off with a positive reputation.
I am having similar problems with my 99 F150 and the heater control. I've read a lot of posts about blend doors and actuators but I'm not sure that is the problem. Thought I would post for some more advice. I checked and double checked the **** and I am pretty sure there is no problem with it.

I know the door is supposed to be electronically controlled, but it sure seems to be somewhat dependent on vacuum. When I start the truck in the mornings, even after the temp gauge shows the truck is plenty warm, it will only blow cold air. If you get on it pretty hard leaving a stop light you can feel the air coming out of the vent getting a little warmer and when stopping at the next light the air gets cooler. It never gets as cool as it was before the last stoplight and so eventually the air gets really warm and doesn't cool down at an idle. Of course by this time I am just about to work.

Also, once the air does get really warm, the control switch doesn't seem to have any effect on the temperature. You can move it to a cooler setting but the air stays warm, even on AC. Seems like bumps and potholes also effect the air temp sometimes.

I think the actuator is working because I can hear the motor when switching the control from cool to warm or warm to cool. Is the actuator locatred behind the glove box on F150's like is posted in the blend door fix? The actuator motor noise seems to coming from somewhere in the middle of the dash, just above the hump in the floorboard.

One more thing, when the AC is on and blowing cold air, if you hit the gas pretty hard (like dropping down into passing gear) you can hear a clunk in the dash and suddenly the air from the AC gets hot.

Any suggestions, advice or comments will be appreciated!

Thanks in advance,
Kevin
Reply With Quote
  #10  
Old 11-08-2003, 12:49 AM
Racerguy's Avatar
Racerguy Racerguy is offline
Super Moderator
 
Join Date: Aug 2002
Location: BC, Canada
Posts: 12,667
Racerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to beholdRacerguy is a splendid one to behold
Hi Kevin and welcome to the forum

The actuator motor is located just above the hump in the floor. You get at it by removing the black plastic trim piece in between the floor and the dash. it just has a couple screws or pins that hold it on. I think I'd remove the actuator and take a look to make sure the blend door isnt broken or binding. Did you find the Explorer blend door fix in the Explorer forum?
As for the A/C problem I'm really not sure. The vacuum motors could be affected by the drop in vacuum when you accelerate hard if there is a leak in the system. However, the vacuum operated doors only control the air distribution and not the temperature.
I'll try to get some more info for you here.
__________________
Dave - FTE moderator
Forum Guidelines
this space for rent
Reply With Quote
  #11  
Old 11-08-2003, 09:42 AM
Idezyne4u Idezyne4u is offline
New User
 
Join Date: Nov 2003
Posts: 4
Idezyne4u is starting off with a positive reputation.
Just make sure you are not working on two separate issues.
Almost sounds logically that something is "loose" when it comes to temp changes <<" if you hit the gas pretty hard (like dropping down into passing gear) you can hear a clunk in the dash and suddenly the air from the AC gets hot.">> sounds like something is not attached someplace.


As for the temp **** issue? make sure to mark the **** first with a pen and turn it with needle nose pliers as it will not turn with your fingers only.
I tried this without pliers and thought I was turning it when in fact I was doing nothing.
Reply With Quote
  #12  
Old 01-16-2010, 03:40 PM
Travis2122 Travis2122 is offline
New User
 
Join Date: Jan 2010
Posts: 1
Travis2122 is starting off with a positive reputation.
I also have 1999 f-150 and my heater this winter also decided to stop working. The fan works fine and also the A/C but I'm just not getting any heat at all. My friend said that it was some sensor in the glove box that needed changed and that it would only be a 5 minute job but I looked in to it and took off a portion of my dash and couldn't find anything. I recently read some other similar problems posted and it sounds like it may be the **** not allow the heat door to open but I really don't know. Does any one have any ideas of what my problem may be some help would be greatly appreciated.
Reply With Quote
  #13  
Old 01-16-2010, 05:06 PM
monckywrench monckywrench is offline
Posting Guru
 
Join Date: Apr 2001
Posts: 2,065
monckywrench is a splendid one to beholdmonckywrench is a splendid one to beholdmonckywrench is a splendid one to beholdmonckywrench is a splendid one to beholdmonckywrench is a splendid one to beholdmonckywrench is a splendid one to beholdmonckywrench is a splendid one to behold
I have now learned the term, "demilune" for that common "half-barrel" shaft shape, and that it is a common furniture descriptor.

(e-genuflects towards Idezyne4u)

My life is complete and I can die happy.
Reply With Quote
  #14  
Old 10-09-2010, 04:38 PM
mike99f150 mike99f150 is offline
New User
 
Join Date: Sep 2010
Posts: 2
mike99f150 is starting off with a positive reputation.
ok checked the blender acutator, it turned but it was slow and not really sure how far it is supposed to turn. the switch appears fine. the other switch the one to select floor and defrost and things works fine if you turn it it will change. blower works great but still no heat. heater core was new last year so i imagine it can't be a bad heater core. what else can i check i removed every visable vaccum line and can't find any cracks or leaks anywhere. i'm at a lost and the ford dealership is no help any ideas?
Reply With Quote
  #15  
Old 12-07-2010, 12:15 AM
MACH1Josh MACH1Josh is offline
New User
 
Join Date: Dec 2010
Posts: 1
MACH1Josh is starting off with a positive reputation.
99 ford heater door

I am having the same problems with my door not flapping open or closed. I think it has to do with a vacume. If I hit the brakes real hard I can get it to flap over and start pouring out heat. I guess i will have to tear into it and find out what it is beacause it was 9 degrees here today.
Reply With Quote
Old 12-07-2010, 12:15 AM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Blowing Hot Air jfrank Explorer, Sport Trac, Mountaineer & Aviator 8 03-16-2013 03:10 PM
Urgent!! A/c Problem Needs Fix Asap! trailor 1997 - 2003 F150 7 02-23-2007 03:49 AM
More Heater Problems zman764 1997 - 2003 F150 8 12-12-2006 02:02 AM
96' E150 - AC Problems - Cold then abruptly Hot mgmoore7 1968-2013 Full Size Vans 3 09-12-2006 08:01 AM
cold heater slayer1958 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 4 11-20-2005 10:16 PM


Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150

Tags
1997, 1999, 99f150, ac, control, explorer, f150, ford, full, heater, hot, knob, parts, problem, switches, temperature

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 08:16 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup