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Direct hot water goes to excessive temperature fault light warning then locks out, anyone have any idea on how to resolve this issue? the model of boiler is biasi he mk2 28sm/c, thanks in advance.

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Try and up the flow rate of cold water feed to boiler mains pressure there is an adjuster on cold feed bottom of boiler

Posted on Oct 18, 2013


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Posted on Jan 02, 2017

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SOURCE: Combi Boiler - Running warm & then cold!? HELP!

the problem was solved on my system by replacing thermostatic valve on shower and putting non return valves on hot and cold feed to shower . the problem was caused by cold water getting into the hot water line through the shower hope this helps

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SOURCE: banging from boiler when hot water turned on.

Install a knocker in the line and bleed the air out

Posted on Jan 14, 2009

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SOURCE: Biasi 24s combi boiler which is producing

change stat

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If steam or excessively hot water shoots out of faucets, or you hear boilding sounds inside the hot water heater, the appliance may not be shutting off at its set temperature. The job of the temperature- pressure (TP) relief valve is to release excessive pressure from steam buildup, but this valve may have been improperly installed, or it may be faulty. Either way, this condition can be dangerous, both because hot water and steam can scald people and because enough pressure could build up to rupture the water heater. Immediately turn down the water heater’s temperature setting and allow the water to cool.

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