Goodman furnace: Lockout — Excessive Retries or Recycles (E0)
Try DIY first, then call a pro
What does E0 mean on a Goodman GMVM97 furnace? The modulating control exceeded its allowed ignition retries or flame recycles on a single call for heat and entered Soft Lockout — E0 flashes during the lockout period, then the control retries.
GOOD NEWS: THE FIRST CHECKS ARE FREE AND TAKE MINUTES.
Try these first — in this order
Clean the flame sensor; watch one ignition attempt through the sight glass.
Repeat lockouts after cleaning = gas pressure/valve diagnosis. DIY part cost: $8–15 / $15–35 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Dirty flame sensor (most common) DIY-CHECKABLE
- Igniter or gas-supply problem DIY-CHECKABLE
Parts referenced by this code
Always match parts against your model's parts list — part numbers vary within a series.
Applies to
GMVM97
Different Goodman generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Verified against Goodman GMVM97 Service Manual, p.46/63/68
Last verified 2026-07-06 · how we verify
Related Goodman fault codes
These codes use the same modulating furnace (gmvm97) — dual 7-segment display system.
| Pattern | Meaning |
|---|---|
| E1 | Low-Stage Pressure Switch Stuck Closed (E1) |
| E2 | Low-Stage Pressure Switch Stuck Open (E2) |
| E3 | Open High-Limit Switch (E3) |
| E4 | Flame Detected With No Call (E4) |