Ariston Genus One System 309, 303(also 5P3,5P6) error, PCB fix, read description!

Cap is soldered to pin 1 and 3, 1 and 2 is not shorted- it looks so, but is not!!! Use capacitor 1nF !!! not 22nF , is much stable and no more error codes. It will work also with 22nF capacitor, but sometimes will appear 5P3 error code. 309 error code mean "Gas relays check failed", I found that the cause of this error is a bad smd capacitor on pcb connected in parallel with gas valve selenoid. Also this capacitor can causes 501,504,5P3,5P6 error code. This fix will work if your gas valve is ok, also check omron relay on main pcb. That what you can see in my video is temporary solution only, use smd capacitor After fixing pcb run "automatic calibration" in servis menu. If automatic calibration is not successfull, try reset to factory settings, parameter 208 in servis menu. All modification on your own risk!