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Vitodens WB2A - sporadic 05 + 06 codes since new
Checked flue, replaced radial fan, pressure transducer, and LGM board. Swapping VR20 board this week. This is the last thing to replace before warranty is up. 8-9 feet of coaxial with 3 elbows and a 45. Voltages from the pressure switch in check. Also looking for a voltage conditioner to plug inline of the power module. Anyone ever heard of this being needed?