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Re: 95 Road Master, flushing heater core and hose values ???
Do not use full water pressure on the heater core, there is a good chance of causing it to leak. I would try one of the common engine flush products first. If the car has automatic temperature control you probably don't have a heater shuoff valve. Are you 100% sure that problem isn't in the control system? If both heater hoses are hot with the engine warmed up you might have a stuck air door.
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