HVACopedia

Lennox · Air conditioner

E441 Inverter compressor slowdown - high compressor current (inverter code 14)

Low severity

What the control is telling you

Compressor current near its limit; speed reduced by 4 Hz and ramp slowed to 5 Hz per 20 seconds. Usually at startup and normally needs no service (dealer information). Inverter LED flash code 14 (red 1 flash, green 4 flashes). S30/S40 thermostat alert code 441 (shown as E441 on the unit control display).

Applies to: Lennox communicating air conditioners incl. variable-capacity inverter units in S30/S40 smart thermostat systems

Likely causes

  • Startup current rise
  • High pressures

Test and repair steps

  1. If this keeps happening, look for other alert codes or high pressure trips.
  2. Clears automatically.
  3. Check inverter LEDs flash code 14 = red 1 flash, green 4 flashes. Normal inverter LEDs with no fault: red ON, green OFF.

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 Residential Communicating Systems Alert Code Guide (V2) 100017 (3/2023), Table 2 Alert Codes and Troubleshooting, p.43. 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.