Lennox Heat Pump Error E266 / E267: Rollout Switch Tripped
Error E266 / E267 on a Lennox heat pump signals that the flame rollout safety switch opened due to abnormal combustion. This fault code is triggered when the system's sensors detect operating conditions outside normal parameters. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning has been servicing Lennox equipment since 1999 and our technicians are familiar with all common error codes across Lennox's product line.
How BC Wide Resolves Lennox Error E266 / E267
When you call BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning for error E266 / E267 on your Lennox system, our dispatch team will note the error code and schedule the appropriate technician. Our service vehicles carry commonly needed parts for Lennox equipment, including blocked heat exchanger and inadequate combustion air replacement components. We provide upfront pricing, clear explanations of the diagnosis, and professional workmanship on every repair. Most error E266 / E267 diagnoses are completed within the first hour of the service call.
Cost to Fix Lennox Error E266 / E267
The cost to resolve error E266 / E267 on your Lennox heat pump depends on the root cause. Simple fixes like cleaning a flame sensor or replacing a capacitor are relatively affordable. More involved repairs such as gas valve replacement, control board replacement, or heat exchanger service will be more significant. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning provides a detailed diagnosis and written estimate before any work begins, so you can make an informed decision about the repair.
Preventing Lennox Error E266 / E267 in the Future
Regular maintenance is the best way to prevent error E266 / E267 and other fault codes on your Lennox system. Annual professional maintenance includes cleaning the flame sensor, inspecting wiring connections, checking gas pressure, verifying proper airflow, and testing all safety controls. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning offers comprehensive maintenance programs for Lennox equipment. Well-maintained systems have fewer error codes and emergency service calls.
What Error E266 / E267 Means on Your Lennox Heat Pump
Error E266 / E267 on Lennox heat pump systems indicates the flame rollout safety switch opened due to abnormal combustion. This diagnostic code is generated by the system's control board when sensor readings or operating conditions fall outside the expected range. Lennox equipment uses sophisticated diagnostics to help technicians pinpoint problems accurately. The error code is stored in the control board's memory and can be retrieved even after the system has been reset.
Common Causes of Lennox Error E266 / E267
Error E266 / E267 on Lennox equipment can be caused by several factors. The most common causes include: blocked heat exchanger, inadequate combustion air, excessive gas pressure, cracked heat exchanger. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning technicians systematically test each potential cause to identify the root issue efficiently. The specific cause in your situation will depend on your system's model, installation configuration, and operating history.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.