Air (hot or cold) is not blowing thru vents.Air
comes out from the defrost vent between
dashboard and window.
Sounds like the system has lost vacuum. When this happens the system defaults to defrost for safety reasons. Look for a disconnected vacuum hose coming from the engine and going through the firewall into the passenger's compartment. HTH. -Jim
Search Ford E-350 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford E-350 Experts