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BLINK-10

Carrier · Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower

Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower BLINK-10 Error Fix: LED 10 Blinks — Secondary Limit Switch Open (Condensing)

The furnace control board LED flashes 10 times, pauses, then repeats. The secondary high-limit switch has opened due to excessive temperature in the secondary heat exchanger area. This code is specific to condensing furnaces (90%+ AFUE) that have a secondary heat exchanger to extract additional heat from the exhaust gases. The secondary limit switch protects this component from overheating. Causes: (1) Blocked condensate drain — the secondary heat exchanger produces acidic condensate that must drain freely. If the drain line or trap is clogged, condensate backs up and overheats. Clear the drain with a wet/dry vacuum or pipe cleaner. (2) Failed secondary heat exchanger — internal corrosion can restrict flue gas flow. (3) Restricted airflow (dirty filter, blocked vents) causing both primary and secondary heat exchangers to overheat. (4) Failed secondary limit switch — the switch itself may need replacement.

High severity2 fixes available

Quick Answer

Error BLINK-10 on the Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower means: LED 10 Blinks — Secondary Limit Switch Open (Condensing). The top-ranked community fix is “Test and Replace the Secondary Limit Switch” (medium difficulty, ~45 min, DIY cost: $15-$50). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · furnace

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many furnace repairs can be done safely at home, consider hiring a qualified technician if:

This is a high severity error — continued use may cause damage or a safety hazard
The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower Error Codes

BLINK-1

LED 1 Blink — System Lockout (Retries Exceeded)

2 fixes

BLINK-2

LED 2 Blinks — Pressure Switch Stuck Closed

2 fixes

BLINK-3

LED 3 Blinks — Pressure Switch Did Not Close (Draft Safeguard)

2 fixes

BLINK-4

LED 4 Blinks — Open High-Limit Switch (Overheating)

2 fixes

BLINK-5

LED 5 Blinks — Flame Sensed Without Gas Valve Call (Dangerous)

2 fixes

BLINK-6

LED 6 Blinks — 115V Power Reversed or Neutral Not Grounded

2 fixes

BLINK-7

LED 7 Blinks — Gas Valve Circuit Failure

2 fixes

BLINK-8

LED 8 Blinks — Ignitor Circuit Fault / Low Flame Signal

2 fixes

People Also Ask About Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower Error BLINK-10

What does error code BLINK-10 mean on a Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower?

Error code BLINK-10 on the Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower means: LED 10 Blinks — Secondary Limit Switch Open (Condensing). The furnace control board LED flashes 10 times, pauses, then repeats. The secondary high-limit switch has opened due to excessive temperature in the secondary heat exchanger area. This code is specific to condensing furnaces (90%+ AFUE) that have a secondary heat exchanger to extract additional heat from the exhaust gases. The secondary limit switch protects this component from overheating. Causes: (1) Blocked condensate drain — the secondary heat exchanger produces acidic condensate that must drain freely. If the drain line or trap is clogged, condensate backs up and overheats. Clear the drain with a wet/dry vacuum or pipe cleaner. (2) Failed secondary heat exchanger — internal corrosion can restrict flue gas flow. (3) Restricted airflow (dirty filter, blocked vents) causing both primary and secondary heat exchangers to overheat. (4) Failed secondary limit switch — the switch itself may need replacement.

How do I fix error code BLINK-10 on my Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower?

The most successful fix is "Test and Replace the Secondary Limit Switch" (medium difficulty, ~45 minutes). Estimated DIY cost: $15-$50. HomeMD has 2 community-ranked fixes for this error.

Is error code BLINK-10 on a Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower error BLINK-10 myself?

Yes — the top-ranked community fix ("Test and Replace the Secondary Limit Switch") is rated medium difficulty and takes about 45 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Non-contact voltage tester.

How much does it cost to repair Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower error BLINK-10?

DIY cost: $15-$50. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower have?

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-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)), BLINK-5 (LED 5 Blinks — Flame Sensed Without Gas Valve Call (Dangerous)), and 3 more.

What other error codes does the Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower have?

The Carrier Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower has 8 other known error codes:

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