Goodman GMVM97 furnace code E8: High-Stage Pressure Switch Stuck Closed
Professional repair
What does E8 mean on a Goodman GMVM97 furnace? The high-stage switch reads closed at the start of the heating cycle.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
Two-stage pressure-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)
- Stuck high-stage switch or wiring TECH
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 E8 mean on a Goodman GMVM97 furnace?
The high-stage switch reads closed at the start of the heating cycle.
How do I fix Goodman GMVM97 furnace code E8?
There's no safe homeowner check, and the switch must never be bypassed. A technician should diagnose the two-stage pressure circuit.
How much does it cost to fix Goodman GMVM97 furnace code E8?
Cost depends on whether the high-stage switch is faulty or its wiring is shorted. A technician's circuit diagnosis is needed before a price can be given.
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.65/68
Last verified 2026-07-06 · page updated 2026-10-03 · how we verify
Related Goodman furnace codes
These codes use the same modulating furnace (gmvm97) — dual 7-segment display system.