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isar he24?

My Isar HE 24 pressure is really high at 3.5. What can I do. A workman has said that as it is this high it might explode. He took out some water from a rad but a few hours later the pressure has returned.

PJAM
October 2014
Heating, Home Heating Systems24 High Water

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Worcester boiler dripping water?

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Boiler cycle?

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Mend Home Heating Systems
Mend Heating, Home Heating Systems
Free repair help for home heating systems