Is your AC on but feels like your heat is really on WELL 

This will work on most vehicles if you cant seem to get the heat to turn off well you can do a quick fix that wont break the bank and will still let you have heat when you need it or until you can do the whole repair. The fords have servos that can go bad , on this expedition its under the dash and impossible to get to without taking the dash loose or even out, so this vehicle the heat was stuck on , so i manually by passed it and it works perfect so for a quick fix you just cant beat this one specially on the ford Expedition's !!