Ford Ranger Repair Question
Teach me a vacuum check for heater
p.s. Or anyother suggestions to what might b causing NO heaty to come outta the vents. thanx
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.
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