Goodman furnace code E6: Low Flame Sense Signal
DIY-friendly fix
What does E6 mean on a Goodman furnace? Furnace runs, but the flame-sensor microamp signal fell below spec. Official: coated/oxidized sensor, wrong sensor position, or lazy flame from improper gas pressure.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
GOOD NEWS: THE FIRST CHECKS ARE FREE AND TAKE MINUTES.
Try these first — in this order
Clean or replace the flame sensor — 15 minutes.
Persistent after cleaning → gas-pressure adjustment. DIY part cost: $8–15 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Coated/oxidized flame sensor DIY-CHECKABLE
Parts referenced by this code
Always match parts against your model's parts list — part numbers vary within a series.
Questions about this code
What does E6 mean on a Goodman furnace?
Furnace runs, but the flame-sensor microamp signal fell below spec. Official: coated/oxidized sensor, wrong sensor position, or lazy flame from improper gas pressure.
How do I fix Goodman furnace code E6?
Note whether heating stays normal. Cleaning or repositioning the sensor and checking gas pressure involve the burner area, so book a technician before lockouts start.
How much does it cost to fix Goodman furnace code E6?
Price depends on whether the sensor needs cleaning or replacement, or whether gas pressure needs adjustment. A technician can tell you after checking it.
Applies to
GMVC96 · GCVC96
Different Goodman generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Same control platform, same code: Amana furnace code E6
Verified against Goodman GMVC96/GCVC96 Service Manual, p.44
Last verified 2026-07-06 · page updated 2026-10-03 · how we verify
Related Goodman furnace codes
These codes use the same dual 7-segment display (two-stage variable-speed) system.
| Pattern | Meaning |
|---|---|
| E5display E5 | Open Fuse (E5) |
| E7display E7 | Igniter Fault or No Ground (E7) |
| E4display E4 | Flame Sensed With No Call for Heat (E4) |
| E8display E8 | High-Stage Pressure Switch Stuck Closed (E8) |