Goodman GMVM970803BN 80,000 BTU 97% AFUE Modulating Gas Furnace with Variable-Speed ECM Blower 8-FLASH Error Fix: Igniter Circuit Fault

Error code 8-FLASH on the Goodman GMVM970803BN 80,000 BTU 97% AFUE Modulating Gas Furnace with Variable-Speed ECM Blower means: Igniter Circuit Fault. The control board detected an open or short circuit in the hot surface igniter circuit — the igniter is either cracked/broken (open circuit), has a short to ground, or the igniter relay on the control board has failed; silicon nitride igniters are fragile and crack from age, thermal cycling, or physical contact; do not touch igniter surface with bare hands

The most successful fix is "Test and Replace the Hot Surface Igniter or Control Board Igniter Relay" (hard difficulty, ~90 minutes). Estimated DIY cost: $40-$100. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Test and Replace the Hot Surface Igniter or Control Board Igniter Relay") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Adjustable wrench, Gloves.

DIY cost: $40-$100. Professional repair typically costs $200-$350. Many homeowners save money by trying the top-ranked community fix first.

The Goodman GMVM970803BN 80,000 BTU 97% AFUE Modulating Gas Furnace with Variable-Speed ECM Blower has 8 other known error codes, including: 10-FLASH (Incorrect Blower Speed / DIP Switch Configuration), 11-FLASH (Communication Error — ComfortNet Bus), 12-FLASH (Blower Motor Fault (ECM)), 13-FLASH (Outdoor Ambient Sensor Fault), 1-FLASH (System Lockout — Retry Limit Exceeded), and 3 more.

Error code 8-FLASH also appears on 2 other Goodman models: GMSS920804CN 80,000 BTU 92% AFUE Single-Stage Gas Furnace, GMVC960804CN 96% AFUE 80,000 BTU Two-Stage Gas Furnace. The fix may vary by model, so check each model's specific page for tailored repair steps.