Lennox Error Code E229 indicates Ignition on high fire – information only. Start by checking the most common and safe items identified in the troubleshooting section. If the code returns after those checks, professional diagnosis is recommended.
Easy
Ignition on high fire – information only
Unknown
Low pressure switch fails to close or continuous fan causes unit to light on high fire
No corrective action required; information only; indicates furnace lights on high fire when low pressure switch fails to close or during continuous fan
Low pressure switch, control logic
Call an HVAC technician if the error persists after completing the recommended basic troubleshooting steps or if the system repeatedly locks out.
Disconnect power before inspecting the equipment. Never bypass safety devices or operate the system if you suspect unsafe conditions.
Learn more about the furnace components and operating conditions commonly associated with diagnostic error codes: