De Dietrich 88065535 Diematic 3 valve option card

This part is a valve option card for the Diematic 3 control system, produced by De Dietrich. It is classified as an electronic control board (PCB) and carries the manufacturer code 88065535 as well as catalogue article 336.568.002. In a boiler or burner system, a control board of this type manages the ignition and safety sequence: it receives signals from the thermostat, starts the fan, controls the gas valve and ignition transformer, and monitors flame presence via the ionisation electrode. If flame is not proven within the safety time, the board locks out the burner. For a heating engineer replacing such a board, the critical point is that electronic control boards are matched to the specific boiler model and the control architecture they belong to. The Diematic 3 designation refers to a particular control system from De Dietrich, and this valve option card is a dedicated component within that system. When selecting a replacement, verify that the board is intended for the same system generation and application – in this case, a valve option card adds or controls additional valve functions within the Diematic 3 setup. No other parameters such as supply voltage, safety times, or physical dimensions are stated here; these must be confirmed against the existing board and the boiler documentation. A mismatched board will either fail to communicate or create a safety risk by using incorrect timing or logic. Always compare the exact part number and system compatibility before fitting.