No heat at idle

[BiGMaC]

YAY!!!!  :yell:

 

[markssho]

Another confirmation! I too notice the same issue, cold or cooler air at idle. I ended up putting about 1/2 gallon in the overflow container and after a day, the issue went away.
Though I did notice while driving this weekend in upper 60's temps, I sometimes got a whiff of antifreeze in the air. Figure I'll smell that as it overflows thru the Spring and early Summer.

 

[DJE624]

Yeah, when I did my 170 I ended up adding a half gallon.  I only spilled a couple ounces.  I'm doing the 160 later tonight so, I'll see what happens then. 

 

[elund126]

My heat is intermittently hot at idle. Even with the top off. I took my daughter to the bus stop this morning and noticed it wasn't very hot as we were sitting there waiting. The temp was 28 degrees outside.

At this point, it's the first day of spring and I am going to stop worrying about it. Temps are going to go up and now I need to focus on fixing the annoying rattle when my moonroof is open!!

 

[SHOdded]

Did you run the heat full blast for a few trips?  Seems like you may still have air pockets in the system.  The blower is running correctly at expected speeds?  Any difference driver vs passenger side?

 

[DJE624]

When I had air in the system, I noticed this:  Start the cold engine, let it idle for a minute or so, give it a quick rev up to about 2K.  You may hear the bubbles like I did up under the dash.  I just kept topping off and releasing pressure from the res tank. 

 

[jimmyducati]

Its crazy how finicky the ecoboost is with its coolant level.. This happened last winter to me, sub zero temps and no heat! Checked my coolant level as suggested here and it looked to be just right, added a little to the overflow and instant heat!