Tag: limit-switch

All the articles with the tag "limit-switch".

• Lennox Error Code 441 — Limit Device Fault

  22 Apr, 2026

  Lennox error code 441 signals a limit device has opened during operation. This guide covers which limit tripped, why, and how to fix it without replacing parts unnecessarily.

• Lennox Error Code 412 — Limit Switch Fault Fix

  2 Apr, 2024

  Lennox error code 412 means the high limit switch has opened due to overheating. This guide covers diagnosis and fixes for the Lennox iComfort and SLP furnace limit fault.

• Carrier 13 Error Code — Limit Switch Lockout Fix

  3 Mar, 2024

  Carrier error code 13 means the limit switch tripped due to overheating. This guide covers every cause and fix — from clogged filters to cracked heat exchangers.