Tag: high-limit-stack-temp

All the articles with the tag "high-limit-stack-temp".

• Lochinvar Knight E02 — High Limit / Stack Temp Fix

  21 May, 2026

  E02 on a Lochinvar Knight wall-hung (WHN, WBN) or Knight XL floor-mount condensing boiler indicates a high limit or stack temperature lockout. The SMART...