Cold air in park

[Redbull14]

Here the problem: I go out to my SHO on my lunch break and run a few errands. Car’s auto climate control works fine. I grab some fast food and sit in the car eating it. After putting the car in park to eat (still running) it begins to blow ice cold air out the floor vents. As I drive back to work it heats back up almost immediately once I start driving. I know there are a couple possibilities but the one I’m most concerned about is a failing water pump. Do you think that would be a possibility and if so, any way to check the pump? It’s a 2014 non-pp with 120k. Thanks in advance for your input!

 

[Majestic]

Add more coolant.

 

[Bluezone]

Yup, you have air in the cooling system.

 

[jman1200]

Add more coolant.

^^^ this.

I spent a whole Winter with very low cabin heat, even during driving. Added less than an inch worth of coolant and voila!

 

[ridered74]

Add coolant and keep an eye on the level, or crawl under the car and check the weephole for moistness.

 

[SHOrod]

Not that you probably need more confirmation that checking the coolant level is the first thing to do, but I also have first hand experience that a slightly less than full coolant level, even in the degas bottle, can cause your symptoms. I'd confirm the radiator is full and make the level in the degas bottle a bit above the "full cold" mark and see if that improves your symptom.

-Rod

 

[IfTheSHOFits]

Obviously, do the simple stuff first. However, I had a similar issue that was not due to low coolant and was certainly not due to air in the coolant passages. Took many trips to the dealer to resolve and I think they had to reach out to Ford Engineering to get some help.

They tried two different methods to purge air; neither worked. No issues with blend doors or any HVAC controls. There was nothing obviously wrong except this symptom.

Turns out there is a check valve on one of the hoses to the heater core. It had failed. The result was that on cold days heat would dissipate quickly at idle. Apply a little throttle (maybe around 1,500) and there was no issue. I don't recall if they replaced the hose or the check valve by itself, but the issue was resolved. Years later, still trouble free.

NOTE: I'm running a job 1 2010 non-PP.

 

[fordowerplus]

Obviously, do the simple stuff first. However, I had a similar issue that was not due to low coolant and was certainly not due to air in the coolant passages. Took many trips to the dealer to resolve and I think they had to reach out to Ford Engineering to get some help.

They tried two different methods to purge air; neither worked. No issues with blend doors or any HVAC controls. There was nothing obviously wrong except this symptom.

Turns out there is a check valve on one of the hoses to the heater core. It had failed. The result was that on cold days heat would dissipate quickly at idle. Apply a little throttle (maybe around 1,500) and there was no issue. I don't recall if they replaced the hose or the check valve by itself, but the issue was resolved. Years later, still trouble free.

NOTE: I'm running a job 1 2010 non-PP.

I'm having the same issue ... Didn't even know there was a check valve. with me luck..lol