HVAC Code Lookup

Coleman Furnace Slow Amber Flash

StatusShown as: Amber LED on two seconds, off two seconds, repeating

Normal operation with a call for heat. The control has a W signal from the thermostat and is running the heating sequence. Not a fault.

Manual wording: “SLOW AMBER FLASH: Normal operation with call for heat.”

Documented for: TG8S, TGLS, TG9S, TM8X, TMLX, TM9X, TM8T, TM9T, TM8V, TM9V

Likely causes, most common first

  1. Normal heating operation with a thermostat call for heat

When to call a technician

No service needed. If the furnace shows this but no warm air reaches the rooms, have a technician check the blower and ductwork.

A Coleman furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Sources

Other Coleman codes