American Standard · Furnace / HVAC
2 flashes System lockout — retries exceeded
What this code means
The integrated furnace control tried to establish a normal call for heat multiple times (retries) and gave up, going into a soft lockout. This is a generic "it kept failing somewhere in the ignition sequence" code, not a specific pressure-switch fault.
Most likely causes
- Weak or dirty flame sensor causing repeated flame-proving failures
- Intermittent pressure switch or inducer issue triggering repeated retries
- Low gas supply pressure
What to try first
Let the furnace attempt its automatic retry once. If it keeps recurring, this needs a technician to find which step in the ignition sequence is actually failing.
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.
FAQ
What does American Standard error code 2 flashes mean?
System lockout — retries exceeded. The integrated furnace control tried to establish a normal call for heat multiple times (retries) and gave up, going into a soft lockout. This is a generic "it kept failing somewhere in the ignition sequence" code, not a specific pressure-switch fault.
Can I fix American Standard code 2 flashes myself?
Usually not. Let the furnace attempt its automatic retry once. If it keeps recurring, this needs a technician to find which step in the ignition sequence is actually failing. If the code returns after one reset, it needs a licensed technician.
What causes American Standard code 2 flashes?
The most common causes are: weak or dirty flame sensor causing repeated flame-proving failures; intermittent pressure switch or inducer issue triggering repeated retries; low gas supply pressure.
Other American Standard furnace codes
All American Standard furnace error codes →
Other furnace brands: Trane · Carrier · Lennox · Goodman · Amana · 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.