Goodman furnace: Low-Stage Pressure Switch Stuck Closed (E1)
Professional repair
What does E1 mean on a Goodman GMVM97 furnace? The low-stage pressure switch reads closed at the start of the heating cycle, before the inducer runs.
GOOD NEWS: THE FIRST CHECKS ARE FREE AND TAKE MINUTES.
Try these first — in this order
Wiring inspection only.
Switch and circuit diagnosis. DIY part cost: $25–60 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Faulty low-stage switch or shorted wiring TECH
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.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 |
|---|---|
| E0 | Lockout — Excessive Retries or Recycles (E0) |
| E2 | Low-Stage Pressure Switch Stuck Open (E2) |
| E3 | Open High-Limit Switch (E3) |
| E4 | Flame Detected With No Call (E4) |