Goodman Furnace Code EE8
Warning
High-stage pressure switch was already closed when the heat cycle started. The furnace usually still runs on low stage, so heat feels weak on cold days.
Manual wording: “High-stage pressure switch circuit closed at start of heating cycle.”
Documented for: Goodman GMVC96, GCVC96, GMVM97, GCVM97, GM9S80, GC9S80, GR9S80, GD9S80, GR9T96, GD9T96 (seven-segment display controls)
Likely causes, most common first
- High stage pressure switch contacts sticking
- Short in pressure switch circuit wiring
What you can safely check yourself
- Turn the furnace off at its power switch for 30 seconds and back on once
When to call a technician
Pressure switch replacement is technician work and must never be jumpered out.
A Goodman furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- *R9T96 & *D9T96 Two-Stage Gas Furnaces (Type FSP Category IV) - IOG-2038E (Daikin Comfort Technologies (Goodman brand), Goodman GR9T96, GD9T96 two-stage 96% AFUE gas furnaces (current R-32 era production)) · checked 2026-08-25
- Installation Instructions for *CVC96* & *MVC96* Two-Stage Gas Furnace - IOG-2015L (Daikin Comfort Technologies (Goodman brand), Goodman GMVC96, GCVC96 two-stage variable-speed 96% AFUE gas furnaces) · checked 2026-08-25