Goodman GMVM970803BN 80,000 BTU 97% AFUE Modulating Gas Furnace with Variable-Speed ECM Blower 3-FLASH Error Fix: Pressure Switch Did Not Close

Error code 3-FLASH on the Goodman GMVM970803BN 80,000 BTU 97% AFUE Modulating Gas Furnace with Variable-Speed ECM Blower means: Pressure Switch Did Not Close. The draft inducer motor is running but the pressure switch has not closed within the expected time window — one of the most common Goodman furnace faults; causes include blocked exhaust vent (ice, bird nests, debris), clogged condensate drain (backs up into inducer housing), cracked or kinked pressure switch hose, weak or failing inducer motor, or a failed pressure switch

The most successful fix is "Test and Replace Pressure Switch or Inducer Motor" (hard difficulty, ~60 minutes). Estimated DIY cost: $20-$40. 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 Pressure Switch or Inducer Motor") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Nut driver set, Flashlight.

DIY cost: $20-$40. Professional repair typically costs $200-$400. 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 3-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.