What each Lennox code means — and what to do next. Stuck? AAA Comfort Air fixes Lennox systems across Central NJ, often same-day.
Lennox builds some of the most efficient furnaces and ACs on the market. Modern Lennox furnaces show an alphanumeric “E” code on a small display.
Read the “E” code shown on the small display on the control board. Older units flash an LED instead. The indicator is a alphanumeric E-code on a 7-segment display (older units flash an LED).
| Code | What it means | What to do |
|---|---|---|
| E200 | Rollout limit open (flame rollout — a safety trip) | Shut the furnace off and call us immediately |
| E201 | Lost communication with the blower motor | Call us |
| E223 | Low-pressure switch open | Vent/inducer/condensate — call us |
| E227 | Pressure switch stuck open | Call us |
| E229 | Reversed line voltage / grounding | Wiring — call us |
| E241 | Flame sensed out of sequence | Flame sensor — call us |
⚠️ Codes can vary by model and control-board revision — always confirm against the label inside your unit’s access panel. For any gas, electrical, or refrigerant fault, call a licensed technician.
Read the “E” code shown on the small display on the control board. Older units flash an LED instead.
You can try one power cycle at the breaker to clear a one-time fault. But if the same code returns, it’s a real fault — repeatedly resetting a gas or electrical issue can be unsafe. Call AAA Comfort Air at 609-665-3022.
AAA Comfort Air installs and repairs Lennox systems across Cream Ridge and Central New Jersey, with same-day and 24/7 emergency service. Call 609-665-3022.
Book online or call your local Lennox HVAC team — same-day & 24/7 emergency service.
