Error Codes

Lennox furnace showing an E code? See what codes like E 223, E 250, E 270 and E 290 mean, from Lennox service literature, and how to fix the common ones.

Trane or American Standard furnace blinking? See what 2 to 9 red LED flashes mean, which patterns are normal, and how to fix the most common codes.

Carrier, Bryant or Payne furnace blinking? Learn how to read the short and long flashes and what status codes 11 to 45 mean, including 31, 33 and 34.

Goodman furnace blinking? See what 1 to 9 red LED flashes mean on Goodman, Amana and Daikin furnaces and what to do for the most common codes.

What does your furnace’s blinking light mean? Learn how to read the code, what the most common codes mean, and find the code list for Goodman, Carrier, Trane and Lennox.