Truma Combi 4/E and 6/E power supply PCB. This is the mains 230V power input circuit board, used on both 4/E and 6/E heater. This board is for heaters produced between June 2007 and June 2018. Part Number 34020-63800 Genuine Truma Part (For heaters produced from 06/2018-05/2020 you need part number 34020-00546)