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    justbloomn Posts: 1, Reputation: 1
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    Mar 12, 2012, 07:00 PM
    Why does my hot water heater only heat when the furnace runs?
    We have an oil fueled hot water boiler system that also fuels our water heater. The hot water from the faucets is now cold and only heats up if the furnace calls for heat. Why would this be?

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