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    michaeledo Posts: 4, Reputation: 1
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    Nov 26, 2010, 02:34 PM
    Shower gets hot for 10 min, then cold for 1-2 minute, then goes back hot
    I have a high efficiency water heater (Polaris PG Model) with an extra tank to store extra hot water in it. Our home has a continuous circulating hot water system to keep things instantly hot. A few weeks ago my circuit board went out and was replaced, since then every shower starts hot for 10 minutes, goes cold for a few minutes, then goes back hot again. I checked the circulating pump its working fine and is on the correct time, High Eff water heater doesn't have a dip tube so I know it wasn't that, burners are working fine and thermostat is working good. Any suggestions? I think it would be odd if all three shower valves need work at the same time. Thanks for your help.

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