If you’re looking for help fixing your Armstrong furnace, look no further! Our comprehensive Armstrong furnace repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model’s error codes.

CODE: LED is on and not flashing
PROBLEM: The furnace is operating normally

CODE: Single LED flash
PROBLEM: Flame continues to burn when the gas is off

CODE: Two LED flashes
PROBLEM: Problem with the pressure switch

CODE: Three LED flashes
PROBLEM: Problem with the pressure switch

CODE: Four LED flashes
PROBLEM: Problem with the high limit switch

CODE: Five LED flashes
PROBLEM: Problem with the rollout switch

CODE: Six LED flashes
PROBLEM: Problem with the pressure switch

CODE: Seven LED flashes
PROBLEM: Problem with the ignitor

CODE: Eight LED flashes
PROBLEM: The flame is dropping

CODE: Nine LED flashes
PROBLEM: Problem with the voltage

armstrong furnace codes

What Our Clients Are Saying About Us