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Cool air at idle with heater on.

Started by 396375, November 07, 2017, 10:54:06 PM

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396375

My 2010 MKS has a problem with cool air coming in when the heater is on at idle.Once the car starts driving the heat comes in and everything is fine.I have replaced the blend door module behind the glove box.I'm thinking there is another one that is the problem.
Thanks

SHOdded

Usually this is due to low coolant or perhaps an air pocket in the cooling system.  Make sure the coolant is at or slightly above the COLD FULL mark when engine is off/at ambient.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

ZSHO

X2 -  probably have an air pocket in the system.
Stat original  ? Z


2013 Performance Package SHO| Livernois Custom Methanol Tune|3-Bar Map|Reische-170-Stat|Full Race Tial-10psi BOV in Black|PPE-Gloss Black Hot Pipes|EPP Dual Intake in Gloss Black|PPE Catted DP|Corsa Sport Cat Back Exhaust|H&R Sport-Springs|CFM Performance Billet Valve Cover Breather In Gloss Black|Llumar 20%Ceramic window Tint|MSD Ignition Coils in Black|Extreme Roof Spoiler|Redline Fluids all around|Gearhead Intercooler|First-SHO With Direct Port Alky-VP-M1-100%-Methanol Injection|LMS-Custom-Dyno-Tuned @ 415whp-465wtq| Best Trap Speed of 115.54 mph|

Brucelinc

Very common issue.    As Shodded said, add coolant to a bit ABOVE the cold full line when the engine is cold.

Blackhawk

This, and keep doing it every couple days until it stops lowering. 
Quote from: Brucelinc on November 08, 2017, 09:04:50 AM
Very common issue.    As Shodded said, add coolant to a bit ABOVE the cold full line when the engine is cold.

396375


396375

#6
3 Quarts  later I have continuous heat.Thanks to all.

SHOdded

2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!