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Discuss Ferroili optimax 25c ignition board in the Gas Engineers Forum area at PlumbersForums.net

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Morning. I'm new to the group. Been to a ferroili optimax 25c locking out in f02. Checked the leads and all. OK. Changed the ignition board on gas valve cleared the fault. But when you call for hot water the drayton valve calls for heating and when you call heating calls for water. Only 3 plug and play connections so I haven't got that wrong. Am. I missing something? Other than a faulty board maybe. Cheers mattt
 

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