Generic · Furnace / HVAC
No heat, blower runs Draft inducer or ignition failure
What this code means
Air is moving through the vents but it's not warm — points upstream of the blower, usually inducer motor, pressure switch, or ignition.
Most likely causes
- Inducer motor not starting
- Pressure switch not closing
- Ignition lockout after repeated failed attempts
What to try first
Check the breaker and furnace service switch are both on, and look for a blinking error LED behind the front panel to narrow it down.
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 Generic error code No heat, blower runs mean?
Draft inducer or ignition failure. Air is moving through the vents but it's not warm — points upstream of the blower, usually inducer motor, pressure switch, or ignition.
Can I fix Generic code No heat, blower runs myself?
Usually not. Check the breaker and furnace service switch are both on, and look for a blinking error LED behind the front panel to narrow it down. If the code returns after one reset, it needs a licensed technician.
What causes Generic code No heat, blower runs?
The most common causes are: inducer motor not starting; pressure switch not closing; ignition lockout after repeated failed attempts.
Other Generic furnace codes
All Generic furnace error codes →
Other furnace brands: Trane · Carrier · Lennox · Goodman · Amana · American Standard · Rheem · Bryant · 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.