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The boiler isn't working. The programmer is showing two red lights. These are the one's to the right of the slider controls. The CH one is on constantly and the one for hot water flashes, regardless of where the slider control is positioned. Pump is running and fan attempts to run/switches off...

Yesterday the plate heat echanger was removed and flushed for the second time this year. There are obviously major problems with this system as I was shown the black flakes that were removed. The plumber who carried out the work said that due to the age, size and condition of the existing...