Goodman Furnace 2 (amber LED) error code
The control board cannot read the furnace's ID (identity) plug — the small configuration plug that tells the board which model it is installed in. Without it, the board will not run the heating cycle.
Also shown as: 2 amber flashes, two amber flashes, fault code 2 amber, ID plug fault, identity plug failure
Last updated: September 30, 2026
What causes the 2 (amber LED) error?
- ID plug not fully seated in the control board
- Damaged or corroded ID plug
- Failed control board not reading the plug
How to fix Goodman 2 (amber LED) — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Power-cycle once
Turn the furnace off at the service switch for 30 seconds and back on. If the board re-reads the plug, the code clears. - Call a technician
Reseating or replacing the ID plug and verifying board communication requires opening the control compartment — a job for a qualified technician.Safety warning: Turn power off at the breaker before anyone opens the control compartment. Line voltage inside can cause serious shock.
When to call a technician
- The code remains after a power cycle
- The furnace was recently serviced — the plug may have been left loose
Frequently asked questions
What is an ID plug?
A small factory-installed plug that identifies the furnace model and capacity to the universal control board so it runs the correct timing and blower profiles.
Can the furnace run without it?
No. The board refuses to operate until it can positively identify the equipment.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.