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. - patedebear
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? - patedebear