https://community.viessmann.de/t5/Gas/Vitodens200-e9-error/m-p/202545#M63777 <P>Hi, all, I am a Viessman customer.</P><P>I had an e9 error when my vitodens 200 trys to turn on. I can hear also a explosion rumor like a boom when burner try to turn on.</P><P>My techinician changed two electrodes, cleaned up the burner, but my vitodens can't turn on.</P><P>My techinician says me that gas pressure is maybe too low (static 20mbar, dynamic 14 mbar). Could you help me to troubleshooting ?</P><P>What kind of check can I suggest to my techinician?&nbsp;</P><P>I apologize for my poor english.</P><P>Thanks in advance.</P> Tue, 07 Dec 2021 19:11:01 GMT sdiluca 2021-12-07T19:11:01Z https://community.viessmann.de/t5/Gas/Vitodens200-e9-error/m-p/202545#M63777 <P>Hi, all, I am a Viessman customer.</P><P>I had an e9 error when my vitodens 200 trys to turn on. I can hear also a explosion rumor like a boom when burner try to turn on.</P><P>My techinician changed two electrodes, cleaned up the burner, but my vitodens can't turn on.</P><P>My techinician says me that gas pressure is maybe too low (static 20mbar, dynamic 14 mbar). Could you help me to troubleshooting ?</P><P>What kind of check can I suggest to my techinician?&nbsp;</P><P>I apologize for my poor english.</P><P>Thanks in advance.</P> Tue, 07 Dec 2021 19:11:01 GMT https://community.viessmann.de/t5/Gas/Vitodens200-e9-error/m-p/202545#M63777 sdiluca 2021-12-07T19:11:01Z