Lennox EL296UHV Error Code E 113: High Line Voltage
What Does Code E 113 Mean?
Error code E113 on the Lennox EL296UHV indicates that the incoming line voltage exceeds the furnace's nameplate rating. The control board monitors the supply voltage and raises this alarm when it detects an overvoltage condition that could damage electronic components.
The most common cause is a utility-side voltage spike or sustained overvoltage condition. This can occur during periods of low demand on the power grid, after utility maintenance, or when a nearby high-draw load suddenly disconnects. The alarm clears automatically 5 seconds after the voltage drops back into the acceptable range.
If E113 appears repeatedly, the problem may be with the home's electrical supply. An improperly configured transformer on the utility pole, a faulty neutral connection at the meter, or a miswired electrical panel can all cause sustained high voltage. An electrician should measure the supply voltage at the panel and at the furnace to determine whether the issue is on the utility side or the home side.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Utility voltage spike or overvoltage condition | Most common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- E113 appears repeatedly or persists for extended periods
- Other electronics in the home are also affected by high voltage
- You notice lights that are unusually bright or flickering
✓ Verified against manufacturer service manual — March 2026