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MEDIUM URGENCY

Carrier Code 14 — Furnace Heating Lockout

Code 14 (1 short + 4 long flashes)

Locked out after exhausting heating retry attempts.

Brand: Carrier (Also covers Bryant, Payne)  |  Equipment: Gas Furnace

What This Code Means

Carrier code 14 (1 short flash followed by 4 long) means the furnace control attempted ignition multiple times and failed each cycle, entering safety lockout. It will not retry until power is cycled.

Likely Causes (Ranked)

Most common (~50%)

Plugged air filter

What: Restricted airflow trips limit switch on every heating attempt.

How to check: Pull filter, hold up to light.

Fix: Replace filter, cycle power 60s.

Shop parts
Common

Dirty flame sensor

What: Coated sensor can't detect flame; control thinks ignition failed.

How to check: Pull sensor (one screw); look for soot/oxide buildup.

Fix: Clean with fine emery cloth or steel wool.

Shop parts
Common

Failed hot surface igniter

What: Cracked or burned igniter doesn't reach ignition temperature.

How to check: Watch heat cycle — igniter should glow bright orange in 30s.

Fix: Replace igniter (typical 3-5 year lifespan).

Shop parts
Less common

Gas supply problem

What: Closed shutoff or low pressure prevents ignition.

How to check: Verify furnace gas valve open; test other gas appliances.

Fix: Open shutoff or call gas utility.

Diagnostic Steps

  1. Cut power 60s to clear lockout
  2. Replace dirty air filter
  3. Watch heat cycle — does igniter glow? Does flame light?
  4. Clean flame sensor if flame dies quickly
  5. Call HVAC tech if code persists after these steps

Frequently Asked Questions

How do I clear Carrier code 14?
Cut power to the furnace for 60+ seconds. Lockout clears on power restore, but the underlying problem will trigger it again unless fixed.
Why does code 14 keep coming back?
Code 14 means repeated ignition failures. Filter replacement and flame sensor cleaning resolve 70%+ of cases.
Same code on Bryant or Payne?
Yes — Bryant and Payne use the same Carrier control board and identical code system.
Can I run the furnace while code 14 shows?
No — the furnace is locked out and produces no heat until cleared and underlying issue resolved.

Related Carrier Codes

Carrier Error Code 33Carrier Error Code 34Carrier Error Code 22

Related Symptoms

Furnace Not IgnitingFurnace Keeps Shutting OffFurnace Clicking Not Igniting

Need More Help?

Try our interactive symptom diagnostic tool or browse Carrier parts.

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