tcbdrummer Posted December 12, 2017 Report Share Posted December 12, 2017 Hello, I have a 2008 edge with the cheepy manual environmental controls. About a week ago the temp. control knob for the HVAC stuff stopped working. The fan speed selector works as well as the far right switch that controls the vents the air comes out. I have checked all of the fuses and they seem to be good. I had read about the heater door actuators but that seems to only apply if one side of the car is having an issue, currently may issues is with every vent. I was wondering if anyone had some suggestions of what to look into. Right now it is blowing warm air when fan is on. If I turn on the AC it does condition the air but being that it is stuck on warm the air only cools a little. Here in SoCal we are having a pretty warm winter so the fact that it is stuck on warm is kinda unpleasant. Like I said, any help would be greatly appreciated. Thanks Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted December 12, 2017 Report Share Posted December 12, 2017 Have you checked a] coolant level, b] ac refrigerant level, c] cabin air filter, d] blower motor and e] the radiator fans? Does it cool better when moving vs idling? That would point to radiator fans, as both of them should be on and running when AC is being used. Quote Link to comment Share on other sites More sharing options...
tcbdrummer Posted December 13, 2017 Author Report Share Posted December 13, 2017 All my levels are good. Changed the cabin air filter two months ago, Checked it and it is still good to go. The radiator fans are both working fine. I actually replace the radiator fans about 4 months ago. There is really no change in temp moving vs parked/stationary. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted December 13, 2017 Report Share Posted December 13, 2017 Ok then. Let's move on to the Blend Door Actuator. Since you have manual controls, there is only one to worry about, it is under the driverside dash in the center console area next to the gas pedal. You can try unplugging it for a bit, see if that helps. Sounds like it does move a little bit, but not fullrange. While it is unplugged, see if you can move the actuator linkage by hand, sometimes it gets stuck and needs that little help to get going. It is possible the manual control is not working properly (resistor is worn out), but most likely, it will be the BDA. Quote Link to comment Share on other sites More sharing options...
tcbdrummer Posted December 13, 2017 Author Report Share Posted December 13, 2017 Thanks, I will dig into this later today. I will let you know what I find. I really appreciate the help. Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted December 13, 2017 Report Share Posted December 13, 2017 Here's a video showing how the actuator's fail. Think this is the correct replacment. (Motorcraft YH1878 Heater Blend Door Actuator). https://www.amazon.com/dp/B009B5S2VO/ref=cm_sw_r_cp_apa_J6zmAbQEJW580 1 Quote Link to comment Share on other sites More sharing options...
tcbdrummer Posted December 14, 2017 Author Report Share Posted December 14, 2017 Ok then. Let's move on to the Blend Door Actuator. Since you have manual controls, there is only one to worry about, it is under the driverside dash in the center console area next to the gas pedal. You can try unplugging it for a bit, see if that helps. Sounds like it does move a little bit, but not fullrange. While it is unplugged, see if you can move the actuator linkage by hand, sometimes it gets stuck and needs that little help to get going. It is possible the manual control is not working properly (resistor is worn out), but most likely, it will be the BDA. After unplugging the actuator and plugging it back in it seems like everything is working OK again! Thanks for the pointers. Is that a sign that the actuator is nearing the end of its life span? Thanks Again!!! 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted December 15, 2017 Report Share Posted December 15, 2017 No idea, as people who have had success with this trick have yet to report back with a yea or nay. Maybe that is a good sign? Quote Link to comment Share on other sites More sharing options...
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