Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower BLINK-8 Error Fix: LED 8 Blinks — Ignitor Circuit Fault / Low Flame Signal

Error code BLINK-8 on the Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower means: LED 8 Blinks — Ignitor Circuit Fault / Low Flame Signal. The furnace control board LED flashes 8 times, pauses, then repeats. The control board detected either an open ignitor circuit (the hot surface ignitor is not drawing expected electrical current) or the flame signal during operation is too low. This dual-purpose code is one of the most commonly encountered on Carrier furnaces. For ignitor issues: the hot surface ignitor may be cracked (visible hairline fracture — especially on older silicon carbide ignitors that are very fragile). Check continuity with a multimeter — a good ignitor reads 40-200 ohms depending on type. Replacement ignitors cost $15-$80. For low flame signal issues: the flame sensor rod is dirty with carbon buildup — this is the #1 furnace service call nationwide. Remove the flame sensor (single 1/4" hex screw), clean the metal rod with fine emery cloth or steel wool until shiny, and reinstall. A clean flame sensor should produce 2-6 microamps of DC current in the flame.

The most successful fix is "Test and Replace Hot Surface Ignitor" (medium difficulty, ~60 minutes). Estimated DIY cost: $15-$80. 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 Hot Surface Ignitor") is rated medium difficulty and takes about 60 minutes. Tools needed: Multimeter, Nut driver set, Phillips screwdriver.

DIY cost: $15-$80. Professional repair typically costs $150-$300. Many homeowners save money by trying the top-ranked community fix first.

The Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower has 8 other known error codes, including: BLINK-1 (LED 1 Blink — System Lockout (Retries Exceeded)), BLINK-10 (LED 10 Blinks — Secondary Limit Switch Open (Condensing)), BLINK-2 (LED 2 Blinks — Pressure Switch Stuck Closed), BLINK-3 (LED 3 Blinks — Pressure Switch Did Not Close (Draft Safeguard)), BLINK-4 (LED 4 Blinks — Open High-Limit Switch (Overheating)), and 3 more.

Error code BLINK-8 also appears on 3 other Carrier models: 58STA090-1-16 90,000 BTU 80% AFUE Single-Stage Gas Furnace, Carrier 58SB0 Comfort 80 Single-Stage 80% AFUE Gas Furnace, Carrier 58STA/STX 80,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace. The fix may vary by model, so check each model's specific page for tailored repair steps.