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i was trying to repair an idea isar he35. the problem the customer is having is when the hot water is running it make a whirring noise intermittently. i have done several test. when c/h is on the flow got upto 65 degree hot return got 52 degree hot. gas rate was correct as per...

i have been to a house where the halstead ace 100 combi boiler is leaking on the dhw flow switch, the flow switch has two pink wires. after a closer look when i turn the hot tap the spindle expand and leaks water from the spindle. i have taken the manifold out hoping a oring would be worn...

Hello am a gas engineer, i have a 3 way divertor valve leaking from the top (where the spindle expand and makes the micro switch and from the flow adjuster). i have a service kit which includes several small orings, diaphragm, and two seperate spindle. i was wondering if anyone knows where i...