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94 Buick Roadmaster no heat one heater hose cold other is hot?
Wiki User
∙ 14y ago
The heater core may be plugged. Flushing it may help. Disconnect both heater hoses from the engine, fabricate a fitting to attach a garden hose to one of the hoses, direct the other hose into a pail, gently turn on water and flush it until it runs clear then swap hoses and reverse flush until clear. Reattach hoses to engine and refill reservoir.
Wiki User
∙ 14y ago
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Thermostat stuck open or heater core clogged. Bad radiator cap or small hole in cooling system.
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Thermostat stuck open or heater core plugged. CONSIDER THE POSSIBILITY YOUR HEATER VALVE IS CLOSED/CABLE RENDERED INOPERATIVE BY A BROKEN PLASTIC SLIDER HOUSING,AS IS OFTEN THE CASE ON OTHER MODELS/MAKES,SHOULD IT NEVER WARM UP.
