Lennox Error Code E110 indicates Low line voltage. 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
Low line voltage
System indicates error; may not operate properly
Line voltage lower than nameplate rating
Check power line voltage and correct; alarm clears 5 seconds after voltage restored
Power supply
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: