Vicks
Vicks Humidifiers & Dehumidifiers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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CF
Display shows “CF” or “Filter” and the humidifier or dehumidifier beeps periodically.
Filter Change Reminder
CL
Display shows “CL” and humidifier will not run; buttons seem unresponsive until something is pressed and held.
Child Lock Mode Activated
E1
Display shows “E1” and the humidifier will not run or mist output stops.
Humidity Sensor Error
E2
Display shows “E2” and the humidifier does not produce mist or shuts down.
Temperature Sensor / Thermistor Error
E3
Display shows “E3” and the warm mist function will not operate or unit shuts off quickly.
Overheat / Boil Dry Protection Trip
E4
Display shows “E4” and the humidifier will not start or shuts down immediately.
Water Level Sensor / Float Error
E5
Display shows “E5” and there is no mist output from an ultrasonic Vicks humidifier.
Ultrasonic Transducer / Nebulizer Error
EC
Display shows “EC” and the dehumidifier stops collecting water.
Refrigerant System / Compressor Error
F
Display shows a flashing “F” and the dehumidifier compressor does not start.
Frost / Defrost Protection Active (Dehumidifier)
HI
Display shows “HI” or “High” and the humidifier stops running or cycles off frequently.
High Humidity Limit Reached
Lo
Display shows “Lo” or “LO” and the humidifier does not produce mist.
Low Water Level Detected
P1
Display shows “P1” and the dehumidifier will not start or stops running.
Bucket Not Installed / Full Bucket Protection
P2
Display shows “P2” and the dehumidifier stops and will not restart until drained.
Internal Reservoir Full (Pump or Gravity Drain Models)
Symptom
Dehumidifier emits a burning or electrical smell during operation.
Overheating Electrical Component
Symptom
Dehumidifier fan runs but compressor never starts; no cooling of coils.
Compressor Start Failure
Symptom
Dehumidifier runs but blows warm, humid air back into the room with little drying effect.
Air Bypass / Internal Ducting Leak
Symptom
Dehumidifier runs but collects little or no water even in a humid room.
Reduced Dehumidification Capacity
Symptom
Dehumidifier stops frequently and displays that the bucket is full, but the bucket is empty.
False Bucket Full Detection
Symptom
Humidifier base overfills and water spills when tank is installed.
Failed Auto-Stop of Tank Valve / Base Overflow
Symptom
Humidifier causes excessive condensation on windows and walls.
Over-Humidification / Incorrect Sizing or Placement
Symptom
Humidifier cycles on and off rapidly, never maintaining steady operation.
Erratic Humidity Control / Sensor Placement Issue
Symptom
Humidifier display and lights work, but buttons do not respond to presses.
Keypad / Control Panel Failure
Symptom
Humidifier emits a strong musty or moldy odor during operation.
Microbial Growth in Reservoir and Wick
Symptom
Humidifier fan runs but there is no visible mist (evaporative wick model).
Dry or Clogged Wick Filter
Symptom
Humidifier is powered on but produces no mist at all (cool mist ultrasonic model).
Ultrasonic Transducer Failure
Symptom
Humidifier leaks water from the base onto the table or floor.
Tank Seal / Valve Leakage
Symptom
Humidifier light is on but fan does not run; unit is silent and no mist is produced.
Fan Motor Failure or Obstruction
Symptom
Humidifier makes loud humming, rattling, or grinding noises during operation.
Fan Motor or Impeller Noise
Symptom
Humidifier produces a white dust on nearby surfaces.
Mineral Aerosolization from Hard Water
Symptom
Humidifier runs but mist output is very weak or intermittent (cool mist ultrasonic).
Restricted Mist Path / Partial Transducer Obstruction
Symptom
Humidifier shuts off after a few minutes of operation and will not restart until cooled.
Overheat Protection Cycling
Symptom
Humidifier tank is full but the base reservoir remains dry; no water flows into base.
Tank Valve Not Opening
Symptom
Humidifier turns on by itself or changes settings without input.
Control Panel Short / Moisture Contamination
Symptom
Humidifier will not power on at all; no lights or display.
No Power / Main PCB or Power Supply Failure
Symptom
Warm mist humidifier not producing steam even though the power light is on.
Heating Element Not Energizing
Symptom
Water collects under the humidifier but the tank appears intact.
Base Reservoir Overflow / Internal Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CF |
Display shows “CF” or “Filter” and the humidifier or dehumidifier beeps periodically.
|
Filter Change Reminder | View Details |
| CL |
Display shows “CL” and humidifier will not run; buttons seem unresponsive until something is pressed and held.
|
Child Lock Mode Activated | View Details |
| E1 |
Display shows “E1” and the humidifier will not run or mist output stops.
|
Humidity Sensor Error | View Details |
| E2 |
Display shows “E2” and the humidifier does not produce mist or shuts down.
|
Temperature Sensor / Thermistor Error | View Details |
| E3 |
Display shows “E3” and the warm mist function will not operate or unit shuts off quickly.
|
Overheat / Boil Dry Protection Trip | View Details |
| E4 |
Display shows “E4” and the humidifier will not start or shuts down immediately.
|
Water Level Sensor / Float Error | View Details |
| E5 |
Display shows “E5” and there is no mist output from an ultrasonic Vicks humidifier.
|
Ultrasonic Transducer / Nebulizer Error | View Details |
| EC |
Display shows “EC” and the dehumidifier stops collecting water.
|
Refrigerant System / Compressor Error | View Details |
| F |
Display shows a flashing “F” and the dehumidifier compressor does not start.
|
Frost / Defrost Protection Active (Dehumidifier) | View Details |
| HI |
Display shows “HI” or “High” and the humidifier stops running or cycles off frequently.
|
High Humidity Limit Reached | View Details |
| Lo |
Display shows “Lo” or “LO” and the humidifier does not produce mist.
|
Low Water Level Detected | View Details |
| P1 |
Display shows “P1” and the dehumidifier will not start or stops running.
|
Bucket Not Installed / Full Bucket Protection | View Details |
| P2 |
Display shows “P2” and the dehumidifier stops and will not restart until drained.
|
Internal Reservoir Full (Pump or Gravity Drain Models) | View Details |
| – |
Dehumidifier emits a burning or electrical smell during operation.
|
Overheating Electrical Component | View Details |
| – |
Dehumidifier fan runs but compressor never starts; no cooling of coils.
|
Compressor Start Failure | View Details |
| – |
Dehumidifier runs but blows warm, humid air back into the room with little drying effect.
|
Air Bypass / Internal Ducting Leak | View Details |
| – |
Dehumidifier runs but collects little or no water even in a humid room.
|
Reduced Dehumidification Capacity | View Details |
| – |
Dehumidifier stops frequently and displays that the bucket is full, but the bucket is empty.
|
False Bucket Full Detection | View Details |
| – |
Humidifier base overfills and water spills when tank is installed.
|
Failed Auto-Stop of Tank Valve / Base Overflow | View Details |
| – |
Humidifier causes excessive condensation on windows and walls.
|
Over-Humidification / Incorrect Sizing or Placement | View Details |
| – |
Humidifier cycles on and off rapidly, never maintaining steady operation.
|
Erratic Humidity Control / Sensor Placement Issue | View Details |
| – |
Humidifier display and lights work, but buttons do not respond to presses.
|
Keypad / Control Panel Failure | View Details |
| – |
Humidifier emits a strong musty or moldy odor during operation.
|
Microbial Growth in Reservoir and Wick | View Details |
| – |
Humidifier fan runs but there is no visible mist (evaporative wick model).
|
Dry or Clogged Wick Filter | View Details |
| – |
Humidifier is powered on but produces no mist at all (cool mist ultrasonic model).
|
Ultrasonic Transducer Failure | View Details |
| – |
Humidifier leaks water from the base onto the table or floor.
|
Tank Seal / Valve Leakage | View Details |
| – |
Humidifier light is on but fan does not run; unit is silent and no mist is produced.
|
Fan Motor Failure or Obstruction | View Details |
| – |
Humidifier makes loud humming, rattling, or grinding noises during operation.
|
Fan Motor or Impeller Noise | View Details |
| – |
Humidifier produces a white dust on nearby surfaces.
|
Mineral Aerosolization from Hard Water | View Details |
| – |
Humidifier runs but mist output is very weak or intermittent (cool mist ultrasonic).
|
Restricted Mist Path / Partial Transducer Obstruction | View Details |
| – |
Humidifier shuts off after a few minutes of operation and will not restart until cooled.
|
Overheat Protection Cycling | View Details |
| – |
Humidifier tank is full but the base reservoir remains dry; no water flows into base.
|
Tank Valve Not Opening | View Details |
| – |
Humidifier turns on by itself or changes settings without input.
|
Control Panel Short / Moisture Contamination | View Details |
| – |
Humidifier will not power on at all; no lights or display.
|
No Power / Main PCB or Power Supply Failure | View Details |
| – |
Warm mist humidifier not producing steam even though the power light is on.
|
Heating Element Not Energizing | View Details |
| – |
Water collects under the humidifier but the tank appears intact.
|
Base Reservoir Overflow / Internal Leak | View Details |
No matching codes found
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