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david philips · Dec 8th, 2012, 11:37

test the old thermostat, it should be closed and if you put it in almost boiling water it should open. if the old one is ok then refit and look for another fault try bleeding the heater or giving it a flush though with a hose in case matrix is blocked

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Dec 8th, 2012, 11:37	#3
david philips panic captain manwaring ? Last Online: Jul 2nd, 2018 17:16 Join Date: Aug 2011 Location: craggy island	test the old thermostate test the old thermostat, it should be closed and if you put it in almost boiling water it should open. if the old one is ok then refit and look for another fault try bleeding the heater or giving it a flush though with a hose in case matrix is blocked.