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can I leave my boiler with a blocked condenser overflow?

my Worcester 28i is working ok, but the plastic pipe that connects to the waste overflow is worrying me.

My sink is blocked, presumably with ice. i am supposed to go away for a week. Not sure if the bolier may go off due to the blocked overflow
wittfan, December 2010
boiler WILL go off with a frozen condensate pipe,if possible disconnect the condensate pipe and allow it ,to discharge to the floor, reconnect pipe when the weather improves above freezing.

wirecutterman, December 2010
link Click here to see other fixes for Worcester 28i.