Ford Ranger Repair Question
Topics covered: Heater, Heater core, Heater hose.
Mileage: No information provided.
Mileage: No information provided.
Asked on November 12, 2006
Teach me a vacuum check for heater
:? i have a 1994 ford ranger 3.0 i cant seem to get the heater to blow cold. Ive reaplced the thermostat, still not heat. I felt both the in and out water lines going through the dash both seem to b the same temp not HOT but warm. So ive ruled out a block in the heater core. I am tyrying to figure out if/how i can check the vacuum controls in the dash? Any help would b a great help thanx.
p.s. Or anyother suggestions to what might b causing NO heaty to come outta the vents. thanx
p.s. Or anyother suggestions to what might b causing NO heaty to come outta the vents. thanx
Asked by schuttecAnswer
Replied on November 29, 2006
What's the temp gauge reading. If it's low the thermostat could be stuck open and the engine never reaches operating temp. The coolant should be over 195 degrees so warm heater hoses isn't right. Some of the fords have a heater core bypass that is vacuum operated. Follow the heater hoses from the core lines back and you'll see a black valve 4 hose connections and 1 vacuum line. make sure that valve moves when switching from cold to hot at temp controls. It should default to hot if there is no vacuum present but who knows. Maybe someone wired it in the cold position instead of replacing it. Good luck.