Spree Posted August 23, 2016 Report Share Posted August 23, 2016 I'm not sure where to post this! I just tried the heater tonight and their isn't any heat! Feels like AC! 60 tonight. 2013 MKX. Is their something I'm overlooking? I had heat last winter. Where should I start to look? I have to figure this out! Winter is coming. Don't know anything about this thing yet besides I love it!.....Help! Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 23, 2016 Report Share Posted August 23, 2016 No heat in any position: PANEL, VENT, DEFROST? Blend door actuators come to mind first, along with a bad HVAC Module or FCIM. I am sure it's not the coolant or a plugged heater core, those would be the normal reasons, but then you should get at least ambient temp air coming out. Check to see if the HVAC module has set any codes ... Bxxxx:xx format. Quote Link to comment Share on other sites More sharing options...
Spree Posted August 23, 2016 Author Report Share Posted August 23, 2016 No heat in any position: PANEL, VENT, DEFROST? Blend door actuators come to mind first, along with a bad HVAC Module or FCIM. I am sure it's not the coolant or a plugged heater core, those would be the normal reasons, but then you should get at least ambient temp air coming out. Check to see if the HVAC module has set any codes ... Bxxxx:xx format. How do I do that? There is no alarms or lights on the dash. Air coming out is colder then the air around me. The radiator hose on the top is hot. It looks like it goes to the thermostat maybe? Then back to the bottom, which is not hot. All the vents work, floor, panel, defrost. My temp is normal, right in the middle. Antifreeze is at perfect level, no leaks anywhere. I have read most everything you all have posted here and I don't see anyone talk about heat problems. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 23, 2016 Report Share Posted August 23, 2016 You should be able to get codes read for free at a local auto store. Or you can buy an ODB II adapter and Forscan Lite and scan the vehicle yourself on your smartphone/tablet. The heater hoses are on the firewall side of the engine, they are on a separate "circuit" from the engine cooling circuit. Heater Core — Plugged Check to see that the engine coolant is at the correct level.Start the engine and turn on the heater.When the engine coolant reaches operating temperature, check the heater core inlet and outlet hoses to see if they are hot.If the outlet only is not hot: the heater core may have an air pocket. the heater core may be plugged. If the inlet only is not hot: the thermostat may not be working correctly. Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 23, 2016 Report Share Posted August 23, 2016 Both sides, driver & passenger don't have heat? Quote Link to comment Share on other sites More sharing options...
Spree Posted August 23, 2016 Author Report Share Posted August 23, 2016 You should be able to get codes read for free at a local auto store. Or you can buy an ODB II adapter and Forscan Lite and scan the vehicle yourself on your smartphone/tablet. The heater hoses are on the firewall side of the engine, they are on a separate "circuit" from the engine cooling circuit. Heater Core — Plugged Check to see that the engine coolant is at the correct level.Start the engine and turn on the heater.When the engine coolant reaches operating temperature, check the heater core inlet and outlet hoses to see if they are hot.If the outlet only is not hot: the heater core may have an air pocket. the heater core may be plugged. If the inlet only is not hot: the thermostat may not be working correctly. I will check this out. Both sides, driver & passenger don't have heat? Correct. Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 23, 2016 Report Share Posted August 23, 2016 Hopefully WWWPerfA_ZN0W gets you on the right track. But if your MKX is a 2013, shouldn't it still be under the 4 year 50K miles warranty? If yes, then just take it to your dealer. 1 Quote Link to comment Share on other sites More sharing options...
Spree Posted August 24, 2016 Author Report Share Posted August 24, 2016 Hopefully WWWPerfA_ZN0W gets you on the right track. But if your MKX is a 2013, shouldn't it still be under the 4 year 50K miles warranty? If yes, then just take it to your dealer. 75,000 I have been everywhere in this Quote Link to comment Share on other sites More sharing options...
Spree Posted August 24, 2016 Author Report Share Posted August 24, 2016 Both heater hoses are Hot! Does this mean a possible blend door problem? Considering my temp is normal, antifreeze is full, I don't have heat on either side, no codes, runs great, no leaks, It worked last winter, and all vents are the same temp (not hot)? Could it be my thermostat? I'm lost! Dealer is my last option. Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 24, 2016 Report Share Posted August 24, 2016 This is just a shot in the dark, try disconnecting the battery for 10-15 minutes to reset all the modules. See if it helps. 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 24, 2016 Report Share Posted August 24, 2016 (edited) Another option might be to pull Fuses 37 & 46 in the passenger compartment fuse panel (under driverside dash). They are 10A fuses, probably RED in color. This is just a shot in the dark, try disconnecting the battery for 10-15 minutes to reset all the modules. See if it helps. Edited August 24, 2016 by WWWPerfA_ZN0W Quote Link to comment Share on other sites More sharing options...
Spree Posted August 24, 2016 Author Report Share Posted August 24, 2016 Another option might be to pull Fuses 37 & 46 in the passenger compartment fuse panel (under driverside dash). They are 10A fuses, probably RED in color. 37 & 46 both good, they were both red 10A Quote Link to comment Share on other sites More sharing options...
Spree Posted August 24, 2016 Author Report Share Posted August 24, 2016 I was just sitting here thinking. If my heater hose is hot going in and hot coming out then my heater core is good right? If I don't have heat on either side and have the duel climate control then it can't be my blend door, cause I would have heat on at least one side, right? My antifreeze is full, fuses are good. This is starting to sound like the thermostat. Doesn't it? Quote Link to comment Share on other sites More sharing options...
akirby Posted August 24, 2016 Report Share Posted August 24, 2016 If it was the thermostat then the engine would be running cold and the heater hoses would not be hot. Sounds like both blend doors are staying on cold so it could be the controller. Doubtful both blend doors failed at the same time. 1 Quote Link to comment Share on other sites More sharing options...
Spree Posted August 25, 2016 Author Report Share Posted August 25, 2016 Looks like it goes in the shop as soon as It can (Lincoln dealer only). Needs an oil change anyway. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 25, 2016 Report Share Posted August 25, 2016 Good luck, I am sure they will figure it out ASAP! Quote Link to comment Share on other sites More sharing options...
Spree Posted August 30, 2016 Author Report Share Posted August 30, 2016 Have an appointment 9/2 at the dealer. Lets see what gong on with this thing. I'll keep you guys updated. Quote Link to comment Share on other sites More sharing options...
Tobal5334 Posted September 2, 2016 Report Share Posted September 2, 2016 I had my drivers side doing that, thought it was a blend door. Ford had to reprogram it. $105.00 and it's working now. FYI Now I don't know if I you could do it yourself very easily or not. I figured 105 isn't too bad. Quote Link to comment Share on other sites More sharing options...
Spree Posted September 2, 2016 Author Report Share Posted September 2, 2016 HVAC control module needed re-programmed, $95, a ten minute fix. While I was there I had the oil changed and tires rotated. 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted September 2, 2016 Report Share Posted September 2, 2016 Phew! Glad that's over with! Quote Link to comment Share on other sites More sharing options...
Spree Posted September 3, 2016 Author Report Share Posted September 3, 2016 Phew! Glad that's over with! LOL...They must have reset everything back to factory. I've been adjusting everything all day. 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted September 3, 2016 Report Share Posted September 3, 2016 At least you'll be comfortable while doing it ... LOL! Quote Link to comment Share on other sites More sharing options...
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