2004 Mountaineer blend control - Ford Forums

carolinatim · 03-16-2008, 07:18

On my 2004 mountaineer the temp control stopped working yesterday. No matter where you set the hot/cold blend knob it blows hot air. I tried selecting A/C and MAX A/C but still only get hot air. I can switch to floor/dash/defrost vents OK but it is always hot air regardless of the vent selected.
With the ignition switch ON I can hear what sounds like an actuator motor when I rotate the temp control knob coming from the drivers side under the dash.

wwb · 03-17-2008, 08:16

Sure sounds like a blend door failure. The noise you hear is the servo motor that moves the door to control the temp..... but obviously something is broken or disconnected.

I had a '97 Explorer that had the problem.... but almost all the '96, '97, and early '98s had the blend door fail. I have no idea what it looks like beneath the dash of an '04, so I can't help much.

If you do a web search on "blend door failure", you'll find several links with fixes... maybe for a new one, if it's any different.