Thanks HIDDENFALLS for trying. I looked at the thermostat housing you mentioned, but BOTH radiator hoses are hot, and engine is reaching normal temperature, so I don't think there is an engine thermostat malfunctioning here. And, there is NO vacuum hose, or even a wire to this thermostat housing, to control anything. I'm sure it's temperature controlling the flow to the RADIATOR, and not the heater core. Also, I should have stated, the TOP heater core hose is HOT, the bottom is only warm. I'm wondering if this model LeSabre even HAS a heater control valve, or if the mixing door (which works fine) is the only thing controlling the amount of heat brought into the passenger compartment. I'm leaning towards a gummed up, or clogged core. BUMMER of a job! Thanks. Rob.
Saturday, November 17th, 2007 AT 4:24 PM