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    Suprima 50 Gas Solenoid Valve Clicking After 10 mins.

    Hi folks, I've got a Suprima 50 with the new type PCB (Installed 2 years ago). Boiler fires up runs for about 10 minutes (flow good, pumps runs fine). Then the Gas Valve starts clunking (several times in quick succession), the boiler restarts, but shuts repeats process soon after. No lockouts...
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