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how can i fix my potterton performer 28?

the hot water only gets warm when the water is flowing fully i suspect the water flow switch is faulty but i cant find my manual
simon taylor, July 2006
i think its the thermistor very common.

peter sing, February 2009
could be your secondary heat exchanger blocked

a team, November 2008
Yes, it could be your flow switch... It could also be a thermistor fault or modulation fault with the gas valve.

ccMods, July 2006
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