I have an 07 Mercury Mariner that only blows hot air when going over 45mph, anything slower is cold air. Blower works fine, heat is good once I go over 45, no radiator fluid smell. No heat when orange option is selected. Im thinking it may be the thermostat, but really not sure. Any ideas?

 

Welcome to the forum

 

Really? You're welcoming them to the forum after 3 years.

You need to work on your manners.

What do you actually get out of posting your spam links?