Tag: hsi-relay-failure

All the articles with the tag "hsi-relay-failure".

• Lennox Error Code 224 — HSI Relay Failure Fix

  21 May, 2026

  Lennox error code 224 — displayed on the alphanumeric LED of G24M, G50, G60, SLP98V, EL296V, and similar Lennox boards — means the control's HSI (hot...