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Viessman Vitoflame 100 natural gas burner D1 faults

ScottB
Member Posts: 2
Having difficulty trouble shooting a D1 fault on a Viessman Vitoflame 100 natural gas chassis burner installed on a Viessman VG2-40 Vitola Boiler, replaced grounding elecrode,ignition electrode and ionization rod. still has lock out.Replaced gas valve still no solution. checked draft and micro-amps both fall within viessman specs. anybody have any ideas as to this continuing problem boiler has been installed for 5 years with no problems until two days ago.
0
Comments
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Which Control
Do you have on the boiler? Is it an old Trimatik?There was an error rendering this rich post.
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Control type
Vitotronic 2000
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