Heat is always on
04-25-2009, 04:34 PM
#1
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Heat is always on
Whenever the climate control is anywhere but the off position, the heat comes on.
Several weeks ago, I heard a noise while turning the dial from hot to cold.
The heat has been on ever since.
Any ideas for a remedy or the cause?
Several weeks ago, I heard a noise while turning the dial from hot to cold.
The heat has been on ever since.
Any ideas for a remedy or the cause?
05-08-2009, 01:59 AM
#2
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It sounds like your climate control door is stuck in the heat position. Look under your dash for a linear actuator or a cable, this changes the position of the door to block of the heatercore. In your case it is stuck open for whatever reason, once you find it you shouldnt have any problems figuring out what the mechanical problem is.
05-08-2009, 07:03 PM
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heat
it is probably your blend door motor, had the same problem on my truck.....change the motor and everything is good to go now.
it is located on the bottom center of your heater box under your dash. make sure your the door turns freely before changing the motor. sometimes it does get stuck.
it is located on the bottom center of your heater box under your dash. make sure your the door turns freely before changing the motor. sometimes it does get stuck.
07-22-2009, 07:59 PM
#5
it is probably your blend door motor, had the same problem on my truck.....change the motor and everything is good to go now.
it is located on the bottom center of your heater box under your dash. make sure your the door turns freely before changing the motor. sometimes it does get stuck.
it is located on the bottom center of your heater box under your dash. make sure your the door turns freely before changing the motor. sometimes it does get stuck.
Also, how do you check to see if the door is stuck? I found the part that switches the door that goes from feet to floor to defrost, etc etc but I can't find a cable for the door going from cold to hot.
Is there a chance the solenoid behind the control **** for the hot/cold could be bad and not even be sending a signal to the motor that controls the door?
Thanks in advance for any assistance.
07-23-2009, 03:50 PM
#6
New Old Guy
My guess is a +1 for the Blend door, which is apparently common. I had a similar issue with my Explorer.
There are some explanations of self fixes out there in several of the forums like:
http://www.conceptualedge.com/blend-door/
and I also saw this:
http://www.heatertreater.net/Ford%20F150%2097-04.htm
You can also Google F150 blend door
There are some explanations of self fixes out there in several of the forums like:
http://www.conceptualedge.com/blend-door/
and I also saw this:
http://www.heatertreater.net/Ford%20F150%2097-04.htm
You can also Google F150 blend door
07-28-2009, 11:34 PM
#7
Ok, after a few extra hours of searching forums and doing some testing I have solved the problem. I am typing up a little summary so hopefully anyone else with my problem will only have to look in one place to find the answer. I hope this helps.
As you will probably find if you research it, there can be several different problems that cause the hot/cold to stay on either hot or cold. First, it could be a broken blend door. Second, it could be a fried blend door actuator motor. Third, it could be the module connected to the hot/cold **** itself.
The first place I would check out if you are looking to fix this problem yourself is www.heatertreater.net. These guys have an awesome step by step video on how to access the blend door actuator. They also have an easier solution in the event that your blend door itself is the problem.
Repair location....
If you are experiencing this problem the blend door actuator is actually pretty easy to access. Under the dash in the middle of the truck you will see a plastic cover (right on top of the transmission tunnel pretty much on the floor of the truck). It is held on with a couple push in trim bolts. Once removing that you will see the white blend door actuator and the bottom of the blend door box (black). Now you can pretty much see everything and can follow the video on www.heatertreater.net to remove the parts.
After pulling it all apart here are the things to check...
1 - If you remove the white blend door actuator and see black plastic particals fall out, chances are the blend door itself is broken. Obviously you have found the problem at this point and can look into the options for replacing the blend door (Not an easy thing to do if you are not handy with tools on cars).
2 - If no pieces fall out, take your fingers and grab the bottom of the blend door (it sticks out just enough to grab with your fingers). With the vehicle off you should be able to freely move the blend door about 60 degrees from hot to cold. If you can do this then the blend door is fine.
3 - If the blend door appears to be working then the next step is to check the blend door actuator. This is really simple but does require you to turn the vehicle on (some people may not like turning the vehicle on with things pulled apart though). As long as you don't unplug anything except the blend door actuator you should be fine (I was). With the vehicle turned on plug the blend door actuator back in and hold it in your hand. With it uninstalled from the blend door and in your hand you will easily be able to see if it is working. With the car on simply move the hot/cold **** from hot to cold. If you move it and the actuator does not work, there is a really good chance it is the actuator itself.
4 - If the actuator is not working there is a slight chance the **** is the problem. This is not very common and there doesn't appear to be a way to really test this unless you have electrical testing equipment and know what to test for. It is more likely the actuator itself.
After going through this testing I found my blend door actuator was the problem. I went to my local Advance Auto Parts and they had one in stock. For my 2002 Ford F-150 it was Dorman part number 604-205 and cost about $50. Put the new actuator in and now my a/c and heat work perfectly fine.
Hopefully this is helpful for anyone experiencing this problem. Good luck in your repairs.
Ray
As you will probably find if you research it, there can be several different problems that cause the hot/cold to stay on either hot or cold. First, it could be a broken blend door. Second, it could be a fried blend door actuator motor. Third, it could be the module connected to the hot/cold **** itself.
The first place I would check out if you are looking to fix this problem yourself is www.heatertreater.net. These guys have an awesome step by step video on how to access the blend door actuator. They also have an easier solution in the event that your blend door itself is the problem.
Repair location....
If you are experiencing this problem the blend door actuator is actually pretty easy to access. Under the dash in the middle of the truck you will see a plastic cover (right on top of the transmission tunnel pretty much on the floor of the truck). It is held on with a couple push in trim bolts. Once removing that you will see the white blend door actuator and the bottom of the blend door box (black). Now you can pretty much see everything and can follow the video on www.heatertreater.net to remove the parts.
After pulling it all apart here are the things to check...
1 - If you remove the white blend door actuator and see black plastic particals fall out, chances are the blend door itself is broken. Obviously you have found the problem at this point and can look into the options for replacing the blend door (Not an easy thing to do if you are not handy with tools on cars).
2 - If no pieces fall out, take your fingers and grab the bottom of the blend door (it sticks out just enough to grab with your fingers). With the vehicle off you should be able to freely move the blend door about 60 degrees from hot to cold. If you can do this then the blend door is fine.
3 - If the blend door appears to be working then the next step is to check the blend door actuator. This is really simple but does require you to turn the vehicle on (some people may not like turning the vehicle on with things pulled apart though). As long as you don't unplug anything except the blend door actuator you should be fine (I was). With the vehicle turned on plug the blend door actuator back in and hold it in your hand. With it uninstalled from the blend door and in your hand you will easily be able to see if it is working. With the car on simply move the hot/cold **** from hot to cold. If you move it and the actuator does not work, there is a really good chance it is the actuator itself.
4 - If the actuator is not working there is a slight chance the **** is the problem. This is not very common and there doesn't appear to be a way to really test this unless you have electrical testing equipment and know what to test for. It is more likely the actuator itself.
After going through this testing I found my blend door actuator was the problem. I went to my local Advance Auto Parts and they had one in stock. For my 2002 Ford F-150 it was Dorman part number 604-205 and cost about $50. Put the new actuator in and now my a/c and heat work perfectly fine.
Hopefully this is helpful for anyone experiencing this problem. Good luck in your repairs.
Ray
