2005 Mercury Montego Q&A

2005 Mercury Montego Question: I have a 2005 mercury montego. Why doesn't my heater blow hot?

Just yesterday I replaced the water pump and thermostat. The heat still blows cold. Now when I turn on the defrost I feel warm air as long as the vegicle is moving. But at an idle both defrost and heat blow cold. -
Answer 1
restricted heater core or still not full of coolant. -
Comment 1
I checked the core with an air hose while I has it all apart, filled the coolant and bled the system. Still blowing cold -
Answer 2
CK MODE DOOR OPERATION -
Comment 1
This sounds more like the issue. A few months back I was hearing a clicking noise behind the glove box and thought it may have been some sort of vac leak to that door. If thats the case whats the fix for it? -
Comment 2
replace mode door,but fords have an issue with there heater box doors breaking best have it ck'd by a mech to be sure -