Koolatron
Koolatron Wine Coolers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Wine cooler display shows E1 and cabinet is not cooling or only slightly cool.
Cabinet Temperature Sensor (NTC) Failure or Open Circuit
E2
Display shows E2 and the wine cooler runs erratically or not at all; temperature reading is inaccurate or blank.
Ambient / Upper Compartment Temperature Sensor Failure
E3
Wine cooler shows E3 and the compressor or thermoelectric module does not run correctly; temperature fluctuates widely.
Evaporator / Coil Temperature Sensor Failure
E4
Display shows E4 and the wine cooler may shut down or fail to maintain set temperature.
Defrost Sensor / Over-temperature Sensor Fault (where equipped)
E5
Wine cooler beeps and displays E5; unit may not cool or may shut down shortly after starting.
Compressor or Peltier (Thermoelectric) Drive Circuit Fault
E6
Display shows E6 and buttons may not respond correctly; temperature may not adjust.
User Interface / Keypad Communication Error
E7
Wine cooler shows E7 and may shut down or run continuously; temperature reading is obviously wrong.
Dual-Zone Temperature Sensor Mismatch or Calibration Error
ER
Display shows ER or "Err" and the cooler may not respond to button presses.
General Control Error / Firmware Fault
H1
Display shows H1 or "HI" and the interior temperature is very warm; unit may be in alarm mode.
High Temperature Alarm Condition
L1
Display shows L1 or "LO" and the interior feels much colder than the set temperature; bottles may be too cold.
Low Temperature Alarm or Sensor Reading Low
Symptom
Chemical or plastic burning smell when the wine cooler is running.
Overheating Electrical Component
Symptom
Condensation forming on the outside of the glass door.
External Condensation
Symptom
Display is dim, flickering, or segments are missing, but the cooler still runs.
Display Module Degradation
Symptom
Display works but buttons do not respond or respond intermittently; temperature cannot be adjusted.
Unresponsive Touchpad / Keypad
Symptom
Door does not stay closed or pops open slightly after being shut.
Door Alignment / Hinge Problem
Symptom
Dual-zone Koolatron wine cooler has one zone cooling properly while the other zone is warm.
Single-Zone Cooling Failure in Dual-Zone Unit
Symptom
Excessive frost or ice buildup on the interior rear wall or around the evaporator.
Frost Accumulation / Defrost Issue
Symptom
High-pitched whine or squeal from inside the cabinet when running.
Evaporator / Internal Fan Noise
Symptom
Interior light stays on even when the door is closed, causing extra heat inside.
Stuck Door Switch or Control Logic Fault
Symptom
Rattling or clanking noise when the compressor starts or runs (compressor models).
Compressor or Tubing Vibration Noise
Symptom
Shelves or racks do not slide smoothly or are difficult to remove/insert.
Rack Alignment / Deformation
Symptom
Strong musty or moldy odor inside the wine cooler.
Odor / Biological Growth
Symptom
Temperature display does not match actual temperature measured with a thermometer.
Temperature Calibration / Sensor Placement Issue
Symptom
Unit frequently turns on and off in short cycles (short cycling).
Short Cycling Control Issue
Symptom
Unit trips the household circuit breaker or GFCI when plugged in or shortly after starting.
Electrical Short or Ground Fault
Symptom
Warm air or condensation around the door frame; door feels warm to the touch.
Door Seal / Insulation Problem
Symptom
Water pooling at the bottom of the wine cooler or leaking onto the floor.
Condensation / Drainage Problem
Symptom
Wine cooler does not power on at all; display is blank and no fans or lights come on.
No Power / Dead Unit
Symptom
Wine cooler interior is too cold and bottles may be freezing even at normal set temperature.
Overcooling / Thermostat or Control Failure
Symptom
Wine cooler interior light does not turn on, but cooling works normally.
Interior LED Light Failure
Symptom
Wine cooler makes a loud humming or buzzing noise from the rear.
Noisy Cooling Fan or Vibrating Heat Sink
Symptom
Wine cooler runs but does not get cold enough; interior stays only slightly cooler than room temperature.
Insufficient Cooling – Thermoelectric System
Symptom
Wine cooler runs continuously and gets very little or no cooling; compressor is hot to the touch on compressor models.
Refrigerant System Failure – Compressor Models
Symptom
Wine cooler runs very hot at the rear; heat sink or condenser is extremely hot to the touch.
Overheating Condenser / Heat Sink
Symptom
Wine cooler vibrates excessively and may move or rattle against nearby cabinets.
Excessive Vibration
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Wine cooler display shows E1 and cabinet is not cooling or only slightly cool.
|
Cabinet Temperature Sensor (NTC) Failure or Open Circuit | View Details |
| E2 |
Display shows E2 and the wine cooler runs erratically or not at all; temperature reading is inaccurate or blank.
|
Ambient / Upper Compartment Temperature Sensor Failure | View Details |
| E3 |
Wine cooler shows E3 and the compressor or thermoelectric module does not run correctly; temperature fluctuates widely.
|
Evaporator / Coil Temperature Sensor Failure | View Details |
| E4 |
Display shows E4 and the wine cooler may shut down or fail to maintain set temperature.
|
Defrost Sensor / Over-temperature Sensor Fault (where equipped) | View Details |
| E5 |
Wine cooler beeps and displays E5; unit may not cool or may shut down shortly after starting.
|
Compressor or Peltier (Thermoelectric) Drive Circuit Fault | View Details |
| E6 |
Display shows E6 and buttons may not respond correctly; temperature may not adjust.
|
User Interface / Keypad Communication Error | View Details |
| E7 |
Wine cooler shows E7 and may shut down or run continuously; temperature reading is obviously wrong.
|
Dual-Zone Temperature Sensor Mismatch or Calibration Error | View Details |
| ER |
Display shows ER or "Err" and the cooler may not respond to button presses.
|
General Control Error / Firmware Fault | View Details |
| H1 |
Display shows H1 or "HI" and the interior temperature is very warm; unit may be in alarm mode.
|
High Temperature Alarm Condition | View Details |
| L1 |
Display shows L1 or "LO" and the interior feels much colder than the set temperature; bottles may be too cold.
|
Low Temperature Alarm or Sensor Reading Low | View Details |
| – |
Chemical or plastic burning smell when the wine cooler is running.
|
Overheating Electrical Component | View Details |
| – |
Condensation forming on the outside of the glass door.
|
External Condensation | View Details |
| – |
Display is dim, flickering, or segments are missing, but the cooler still runs.
|
Display Module Degradation | View Details |
| – |
Display works but buttons do not respond or respond intermittently; temperature cannot be adjusted.
|
Unresponsive Touchpad / Keypad | View Details |
| – |
Door does not stay closed or pops open slightly after being shut.
|
Door Alignment / Hinge Problem | View Details |
| – |
Dual-zone Koolatron wine cooler has one zone cooling properly while the other zone is warm.
|
Single-Zone Cooling Failure in Dual-Zone Unit | View Details |
| – |
Excessive frost or ice buildup on the interior rear wall or around the evaporator.
|
Frost Accumulation / Defrost Issue | View Details |
| – |
High-pitched whine or squeal from inside the cabinet when running.
|
Evaporator / Internal Fan Noise | View Details |
| – |
Interior light stays on even when the door is closed, causing extra heat inside.
|
Stuck Door Switch or Control Logic Fault | View Details |
| – |
Rattling or clanking noise when the compressor starts or runs (compressor models).
|
Compressor or Tubing Vibration Noise | View Details |
| – |
Shelves or racks do not slide smoothly or are difficult to remove/insert.
|
Rack Alignment / Deformation | View Details |
| – |
Strong musty or moldy odor inside the wine cooler.
|
Odor / Biological Growth | View Details |
| – |
Temperature display does not match actual temperature measured with a thermometer.
|
Temperature Calibration / Sensor Placement Issue | View Details |
| – |
Unit frequently turns on and off in short cycles (short cycling).
|
Short Cycling Control Issue | View Details |
| – |
Unit trips the household circuit breaker or GFCI when plugged in or shortly after starting.
|
Electrical Short or Ground Fault | View Details |
| – |
Warm air or condensation around the door frame; door feels warm to the touch.
|
Door Seal / Insulation Problem | View Details |
| – |
Water pooling at the bottom of the wine cooler or leaking onto the floor.
|
Condensation / Drainage Problem | View Details |
| – |
Wine cooler does not power on at all; display is blank and no fans or lights come on.
|
No Power / Dead Unit | View Details |
| – |
Wine cooler interior is too cold and bottles may be freezing even at normal set temperature.
|
Overcooling / Thermostat or Control Failure | View Details |
| – |
Wine cooler interior light does not turn on, but cooling works normally.
|
Interior LED Light Failure | View Details |
| – |
Wine cooler makes a loud humming or buzzing noise from the rear.
|
Noisy Cooling Fan or Vibrating Heat Sink | View Details |
| – |
Wine cooler runs but does not get cold enough; interior stays only slightly cooler than room temperature.
|
Insufficient Cooling – Thermoelectric System | View Details |
| – |
Wine cooler runs continuously and gets very little or no cooling; compressor is hot to the touch on compressor models.
|
Refrigerant System Failure – Compressor Models | View Details |
| – |
Wine cooler runs very hot at the rear; heat sink or condenser is extremely hot to the touch.
|
Overheating Condenser / Heat Sink | View Details |
| – |
Wine cooler vibrates excessively and may move or rattle against nearby cabinets.
|
Excessive Vibration | View Details |
No matching codes found
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