HVACopedia

Lennox · Furnace

E110 Low line voltage

High severity EL296UHVLennox SL280UHVLennox ML180UHELennox SL297NV

What the control is telling you

Line voltage is below the nameplate rating.

Applies to: EL296UHV(X) series furnaces (integrated control 103130-XX and 107045-XX)

Likely causes

  • Low supply voltage from utility or panel
  • Undersized or loose supply wiring

Test and repair steps

  1. Warning: Use caution when measuring 120 VAC line voltage.
  2. Measure line voltage at the furnace and compare to the nameplate (120 V, 60 Hz).
  3. At the integrated control, line hot to line neutral should read 97-132 VAC.
  4. Check breaker, disconnect and wiring connections for voltage drop.
  5. Correct the supply problem; the alarm clears 5 seconds after voltage recovers.

Settings for these units

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: Lennox EL296UHV(X) Unit Information / Service Literature, Table 5 Ignition Control 103130-XX Diagnostic Codes, p.33; Ignition Control 107045-XX Diagnostic Codes table, p.40, Proper Ground and Voltage p.85. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.