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yes it does do sometimes - especially when the pressure is increased above 2.5. . .

Seen a load of advice on this forum with regards to the above boiler and was hoping someone may be able to help me out!. . . It is a Powermax 155 Range boiler installed in 2000 (ish) serial: s210370 It repeatedly (several times a day) looses pressure and cuts out (lock out). It is turned...