[matter57]

Originally Posted by cth6

I have a ‘16 F22 61k miles, no mods.

We are just getting into our Florida winter and noticed that heating was sub par.

When set both sides to 84*. The driver dash vent, floor vent and half of the defroster pushes warm air at a below average flow rate. The center console, rear vent, and the passenger vents are cold. When I rotate the driver and passenger temps to 60* the temps go cold and the volume air airflow increases to normal levels. Noticeably stronger then when on 84*. The coolant temp is 212* and I am doing this parked so airflow is generated by the blower not ram pressure.

The coolant level is at the high mark, both feed and return coolant lines into the firewall are nice and hot. No codes using a scanner. Waiting on access to download ISTA-D to see if I can see anything, but not an expert on what to look for. I have seen posts about actuating the vent actuators ( I believe there are 9 of them) and adjusting the flap positions, but have not found instructions.

I am getting some heat and the return line is hot, so my assumption the heater core is not blocked otherwise the return side would be cold.

Has anyone experienced this scenario and know of a fix? Does anyone have access to the maintenance docs on how to scan the IHKA and adjust the actuators/flaps?

Thanks!

CT

I have the same problem with my '15 F22 but on the passenger side vents - that side is cold when heat is called and working on the driver side. I will learn from your solution - I hope!