Lennox Furnace Code E113
Warning
High line voltage. The 120-volt supply to the furnace is higher than the unit nameplate rating.
Manual wording: “High line voltage. Line Voltage High (Voltage higher than nameplate rating). Provide power voltage within proper range.”
Documented for: EL296UHE and SLP98UHV series
Likely causes, most common first
- Utility supply voltage running high
- Incorrect transformer tap or supply configuration at the building
What you can safely check yourself
- Check whether other equipment in the house is also affected
When to call a technician
Have an electrician or HVAC technician measure supply voltage and bring it into the proper range.
A Lennox furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- EL296UHE Service Literature (Corp. 1246-L10), Table 4 - Integrated Control Diagnostic Codes (Lennox Industries Inc., EL296UHE series 96% AFUE two-stage upflow/horizontal gas furnace (EL296UH045XE36B, EL296UH070XE36B, EL296UH090XE48C)) · checked 2026-08-25
- SLP98UHV Service Literature (Corp. 1029-L7), Table 14 - LED 7 Segment Status / Error Code and Integrated Control Diagnostic Codes (Lennox Industries Inc., SLP98UHV series variable-capacity communicating gas furnace (66,000-132,000 Btuh)) · checked 2026-08-25