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Morco combi boiler fault?

My Morco combi boiler FEB-24ED shows a fault F4 (Hi Limit Thermostat Failure) how do I repair this.
Thanks

jim mcmartin, February 2014

home Fix label Heating label_important Home Heating Systemsdone

yes shows f2 fan does not switch off boiler works initially but will not restart as fan will not switchn off shows f2 and neither bheating or hot water works

jack, June 2017

hi limit thermostat needs changing

terry, December 2014

Fix Fault - Heating

home label Heating label_important Home Heating Systems

Fix Fault - Heating

home label Heating label_important Home Heating Systems

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home Fix label Heating label_important Home Heating Systems

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