Incorrect ? ame formation. boiler has not been burning but an ionization ? ow (?ame) has still been detected
Check whether the ionization cable and/or the electrode are responsible for a possible short-circuit. Remove the plugs from the ionization cable connected to the control unit and to the electrode. Now using a universal meter take a measurement between the ionization connection and the ground, now re?t it part by part until a short-circuit takes place.
Rectify the short-circuit and if necessary replace this part.
