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Web23 May 2013 · Plumbing and Central Heating Potterton Powermax HE 'A15' Lockout m33ksy 23 May 2013 m33ksy Joined 22 Nov 2007 Messages 11 Reaction score 0 Location … WebPossible Cause: Boiler Max temperature exceeded for gradient (or overtemperature) Probable pump jammed or air in the circuit or Safety thermostat sensor tripped diagnostic\\u0027s ki
Potterton Boiler Problems, Repair Advice & How to Fix - Boiler Guide
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