Trane · Furnace / HVAC
13 Ignition lockout
What this code means
The furnace tried to light the burners a set number of times and gave up to avoid an unsafe gas buildup.
Most likely causes
- Dirty or degraded flame sensor
- Low or no gas supply at the valve
- Failing hot surface igniter
What to try first
Confirm the gas valve is fully open and try one manual reset at the furnace switch. If it locks out again, stop resetting it repeatedly.
Safety note: if this code returns after one clean reset, stop resetting it — repeated lockouts usually mean a real fault that needs a licensed technician. Never bypass a safety switch.
Find the part on Amazon →FAQ
What does Trane error code 13 mean?
Ignition lockout. The furnace tried to light the burners a set number of times and gave up to avoid an unsafe gas buildup.
Can I fix Trane code 13 myself?
Usually not. Confirm the gas valve is fully open and try one manual reset at the furnace switch. If it locks out again, stop resetting it repeatedly. If the code returns after one reset, it needs a licensed technician.
What causes Trane code 13?
The most common causes are: dirty or degraded flame sensor; low or no gas supply at the valve; failing hot surface igniter.
Other Trane furnace codes
All Trane furnace error codes →
Other furnace brands: Carrier · Lennox · Goodman · Amana · American Standard · Rheem · Bryant · Generic · Nest
This information may contain errors or not apply to your exact model — always double-check it against your appliance's own manual before acting. If there's any chance of a gas, fire, electrical, carbon monoxide, or other safety hazard, stop and call a licensed professional or the appropriate agency (e.g. your gas utility) instead of relying on this page alone.