Ford Ranger Repair Question
Topics covered: Engine, Vacuum leak, Blend door.
Mileage: No information provided.
Mileage: No information provided.
Asked on March 11, 2007
Heater
I have a ford ranger truck 1998 with a four cy engine, the heater control will move to all dials but it will only work the defrost on all dials. I have about 127,00 mileage on the truck. Why? :lol:
Answer
Replied on March 11, 2007
check for a vacuum leak in the engine compartment.
Replied on March 12, 2007
Fordtech is right, defaulting to defrost mode is classic vacuum issue with Fords,, there's a vacuum leak somewhere, also once I ran across where the linkage fell off the blend door, resulting in same..vacuum leak could be at the function control valves, they are combo i believe of electric and vacuum... I had an older Taurus where if you were climbing a long hill at highway speed, it would lose the vacuum supply to the function control and it would revert to the defrost mode, heat a or a\c,, I even tried putting an extra-large vacuum storage tank in the line still no good, the low engine vacuum climbing the hill would take it all away