Quizzes & Puzzles1 min ago
Potterton Combi Bolier
2 Answers
I have a 6 year old Potterton Combi 80 boiler.
In the summer it is OK. However, in winter it tends to 'lock out' at least once a day.
When this happens it does not always reset and so I have to turn off the central heating switch, run a hot tap and then switch the boiler back on. This normally works.
I have had both the modulation circuit board and boiler overheat thermostat replaced with no success.
Any suggestions?
Cheers.
In the summer it is OK. However, in winter it tends to 'lock out' at least once a day.
When this happens it does not always reset and so I have to turn off the central heating switch, run a hot tap and then switch the boiler back on. This normally works.
I have had both the modulation circuit board and boiler overheat thermostat replaced with no success.
Any suggestions?
Cheers.
Answers
Best Answer
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For more on marking an answer as the "Best Answer", please visit our FAQ.Boiler lock-out generally occurs when the water temperature rises too high. But you've changed the overheat thermostat. Could be scale on the inside of the heat exchanger - impacts the ability of the boiler to transfer heat out into the water flowing past. Do you live in a hard water area? Has anyone suggested descaling the water with a proprietary chemical, then refilling with inhibitor. Probably something you could do yourself.
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