Question about 2006 Ford F-250 Super Duty
The heater works great until you move the controls to defrost or mix then the A/C pump kicks on and then it blows cold air.
Great question dustin but the A/C is suppose to come on in defrost or mix mode- this is floor & defrost. Does not seem to make sense does it. One of the things the a/c does is remove the moisture from the air. You need warm DRY air to remove the moisture from the windows. An automotive H.V.A.C. ( Heating,Ventilation,Air conditioning) first forces air thru the a/c evaporator core then thru the heater core and out the selected vent. If you only want a/c a blend door will by-pass the heater core which is controlled by a hot/cold knob or digital temp cotrol on the dash. Now back to the cold air problem- assuming the basics are all ok- Coolant is full, Engine gets up to proper operating temp-around 195 degrees- upper radiator should be hot. Both heater hoses should be hot. If thats all OK the blend door might not be working. It is controlled by an electric motor called a Blend Door Actuator which are prone to fail. I have replaced many on ford vehicles. Hope this helps
Posted on Nov 26, 2013
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
guys have you checked for a vaccum leak????? there is a little plastic ball with a vaccum line going to it that controls the outside air coming in. check for a leak in this line
Posted on Jan 08, 2009
Make sure the heater core is in the open position by using the shut off valve and turning it to open. next, you may have a malfunction in the direction door the directs the air flow in the dash. a lever may have become lose or separated. may be a bad servo motor not directing the door to move to the heater position. i would start by checking that shut off valve first on the heater core.
Posted on Mar 13, 2009
plus one on the cooling fan problem. if it was low on charge then as you slow down, condensor temps and line prressures would raise therefore it would cool at low speed and and not when moving since the incoming air would drop system temp,reducing line pressure and then cusing compressor to cycle. the auxillary cooling fans must be on whenever a/c is on, if not, thats your problem. get this taken care of because if you get stuck in traffic, your engine will overheat also if fans are not running
Posted on Sep 02, 2009
This is a problem with these trucks, theres two things that cause this, the blend door is not working, the most common is the actuator motor that controls this door is bad and thats the clicking you are hearing, this motor is bolted to heaterbox, you will need to move heat lever to find the clicking motor as to there are a few of them that control other options, the other problem is the door breaks where the motor hooks to. that moves the door, if you remove the motor look at end where motor connects if its broke then a new door is needed, most of the time its just the actuator, heres a picture to help you find it, hope this helps.
Posted on Oct 19, 2010
Tips for a great answer:
Oct 21, 2014 | Cars & Trucks
Jan 17, 2014 | 1996 Pontiac Grand Am
Dec 13, 2013 | 2005 Toyota Corolla
Dec 30, 2010 | 1997 Ford Expedition
Nov 08, 2010 | 1992 Nissan Pickup
CONTROL CABLE Adjustment
Oct 20, 2010 | 1996 Honda Accord
Jan 14, 2010 | 1994 Jeep Grand Cherokee
May 10, 2009 | 2004 Honda Odyssey
Jan 27, 2009 | 1999 Jeep Cherokee
Dec 22, 2008 | 2004 Pontiac Montana
230 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: