Home Fault Codes

Goodman Furnace Error Code E6: Meaning and Fix

Applies to: Goodman GM9S80, GC9S80 and VM9S80 single-stage 80% furnaces with the E-code display control (Goodman service manual RS6621008).

E6
How E6 appears on a Goodman furnace display.

Also shown as: flame sensor

Reading the furnace display

A furnace reports faults on a small status LED on the control board, seen through the sight glass in the blower door, or on a two-digit display. Watch a full cycle of the pattern and count the flashes, including the pause between groups, before you decide what you saw. The code chart is on the label inside the blower door.

This page lists the fault codes this brand documents, with likely causes and a short repair path. The codes apply to model numbers such as GM9S80 and GC9S80; check the label on your unit to confirm yours.

What causes E6

How to fix it

If you smell gas, leave the building and call your gas utility from outside; do not touch switches or the furnace. Switch the furnace power off before you open the blower door or touch the igniter or flame sensor, and call a licensed HVAC technician if you are not sure.

The code meaning comes from the manufacturer document listed under Sources. The causes and steps below are general troubleshooting guidance, not the manufacturer's service procedure.

  1. Switch the furnace power off before touching the flame sensor.
  2. A coated flame sensor can be cleaned gently, as the manual instructs, and checked for correct alignment in the flame.
  3. Do not adjust gas pressure yourself.
  4. If E6 keeps appearing, a technician should compare the gas pressure to the rating plate and adjust as needed.
  5. Restore power and run a heating cycle. If the code returns, call a licensed HVAC technician and give them the code, the board label and the furnace model number.

Questions

What does E6 mean on a Goodman furnace?

E6 on a Goodman single-stage furnace means the flame sense micro amp signal is minimal. The furnace usually still runs normally, but the signal is weak.

Can I reset the furnace myself?

The control can be reset by switching power off at the furnace switch or breaker for about 30 seconds, which clears some lockouts. If the same code returns, the fault is still present and the control will shut the furnace down again. Never bypass a safety switch to keep it running.

When should I call a technician?

Call a licensed HVAC technician for anything involving gas, the pressure switch, the limit or rollout switches, the igniter, the flame sensor or a control board replacement, or if the code keeps coming back after the simple checks.

Other brands with code E6

The same code can mean something different on another maker's appliance. Check the brand before you act.

Amana furnaceLow flame sense signalElectrolux refrigeratorIce maker faultSpeed Queen dryerRestricted airflow

Other Goodman furnace codes

E0Ignition lockout after repeated failed ignitionE1Pressure switch closed at the start of the heating cycleE2Pressure switch circuit not closedE3Primary limit circuit openE4Flame sensed with no call for heatE5Open fuse or short in low voltage wiring

Sources

Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.

Applies to models including GM9S80, GC9S80, GMEC96.