Tag: flame-sensing

All the articles with the tag "flame-sensing".

• Burnham Boiler B26, Err 4, Err 6 Error Codes — Causes & Fix

  27 May, 2026

  Burnham boiler errors B26 (safety limit open), Err 4 (low flame current), and Err 6 (flame without call) explained. Diagnosis steps, flame rod testing, microamp readings, and control board types for Alpine, Series 2, MPO, Pinnacle, ES2, and SCG.