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Layout: My combi condensing boiler (Ideal HE24) is located downstairs one end of the house. There’s 22mm pipe off the boiler tee’d , one side down to 15mm to feed 2 rads downstairs total about 4kw, the other 22mm shooting off upstairs to feed the upstairs and the downstairs at the other side of...

My partner has a Ideal Isar HE24 combi boiler and today the digital front display went blank. The boiler still works. I've reset the control panel but no joy. The hot water thermostat dail never really worked but now the hot water is really hot and tuning the thermostat dail doesn't do...