Heater problems have been a common issue with the 2007 ford explorer, and among these issues a blown thermostat seems to be the biggest culprit. a blown resistor or motor can also be reason that your heater has been putting out only cold air. sometimes, poor heat problems could be the cause of a low coolant level. make sure that youve maintained appropriate levels of coolant in the system, so that it may not show errors such as these. there could be a number of other issues as well such as a bad heater core or bad blend door actuator which could not be rotating as intended. if the heat keeps bothering you, then make sure to have it checked as soon as possible if the problem still persists without a solution in sight as it can be very annoying to have a broken heating system during winters.
An issue reported with a 2007 ford explorer at is that it only blows out cold air. this is often due to the blower motor, the thermostat, or the resistor.