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Hi all, my vaillant ecofit boiler stopped working this morning with error code f28. On closer inspection it appears to be related to condensate outlet likely being blocked. If I change the outlet to run off into a plastic container the boiler runs fine, it's just when reconnected to the pipe...

Hello all, I had the central heating system drained today for a pipe repair, which was completed successfully. The system has been refilled and all radiators are working except for 2 on the ground floor, which feel ice cold to the touch. The pipes going into the radiator valves also feel really...