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Made a quick stop into one of our ford dealerships in town yesterday and told him my problem...i was driving across provinces yesterday morning when my heater switched permanently to the defrost setting, he said that it is a default for a broken or undone vacuum hose. Anyone had this problem or does anyone know how many vacuum hoses there are and where to look please??
Last edited by vonndogleg; Jan 16, 2007 at 08:50 AM.
Before anyone can help, it will be nice to know exactly what model year your truck is.
On Edit, this may help:
2005/06 A/C or Ventilation Control Problems:
Trucks built between 9-15-04 to 6-8-05 may blow air out of the defrost vents with the mode selector in other positions. The vacuum pump may also run excessivly. Lower the glove box and inspect the vacuum lines to see if they are wraped around the panel/floor door actuator rod. If the hoses are wraped around the rod, inspect for damage to the hoses. If the hoses cannot be repaired, replace them with part number 5C3Z-19D699-AA for automatic temp control or 5C3Z-19D699-BA for manual climate control.
TSB 05-14-9.
check to see if your vacuum pump is even coming on. if so, the popular spot is the white hose above the passenger foot well on the recirc door motor. make sure the hose is on the nipple.
thanks guys, but now my floor heating kicked in again meaning its probably an intermittent problem with something along the vacuum lines, only i don't know what it all consists of...so chances are none of my lines are unhooked or broken...
i had it on defrost and floor, then i changed it to straight defrost to heat my windshield for suction cups on my radar detector, then it would not change...what is eatc??