Whirlpool Air Conditioner Error Codes

Complete Whirlpool Air Conditioner Guide

This guide explains all Whirlpool Air Conditioner error codes (CH series) with simple troubleshooting steps to help you identify and fix common issues safely before calling a technician.

E1
Room Temperature Sensor Fault
  • Check room sensor wiring connection.
  • Clean dust around sensor area.
  • Test thermistor resistance with multimeter.
  • Replace sensor if readings are abnormal.
E2
Indoor Coil Sensor Fault
  • Inspect evaporator coil sensor wiring.
  • Check for ice buildup on coil.
  • Test sensor continuity.
  • Replace sensor if faulty.
E3
Outdoor Fan Motor Error
  • Check fan motor wiring connections.
  • Inspect fan blades for blockage or damage.
  • Test fan capacitor condition.
  • Replace fan motor if not operating.
E4
Communication Failure
  • Inspect indoor and outdoor unit wiring.
  • Check control board connectors.
  • Perform full power reset.
  • Replace PCB if issue persists.
E5
Compressor Overload Protection
  • Turn off unit and allow compressor to cool.
  • Check refrigerant pressure levels.
  • Inspect compressor wiring and relay.
  • Call technician if fault repeats.
E6
Evaporator Fan Motor Fault
  • Check evaporator fan for obstruction.
  • Inspect wiring harness connections.
  • Test fan motor operation.
  • Replace fan motor if defective.
E7
Low Refrigerant / Cooling Performance Issue
  • Check for weak cooling performance.
  • Inspect for refrigerant leaks (technician required).
  • Ensure condenser is clean.
  • Contact service for gas recharge if needed.
E8
Overheat Protection Activated
  • Clean air filters immediately.
  • Ensure proper airflow around unit.
  • Check condenser coil condition.
  • Allow system to cool before restart.
E9
Voltage / Power Supply Error
  • Check household voltage stability.
  • Inspect breaker and power outlet.
  • Avoid using extension cords.
  • Use voltage stabilizer if needed.
E10
Drain System Blockage
  • Check drain hose for clog or kink.
  • Inspect drainage pan and outlet.
  • Clean drain line thoroughly.
  • Reset unit after clearing blockage.
E11
Temperature Sensor Drift
  • Check sensor calibration.
  • Inspect wiring and connectors.
  • Compare readings with room thermometer.
  • Replace sensor if unstable.
E12
Defrost System Failure
  • Inspect defrost heater and wiring.
  • Check evaporator for ice buildup.
  • Test defrost thermostat.
  • Replace faulty defrost components.
E13
High Pressure Protection
  • Clean condenser coil thoroughly.
  • Check outdoor fan operation.
  • Ensure airflow is not blocked.
  • Call technician if pressure remains high.
E14
Indoor Unit EEPROM Error
  • Reset power to system.
  • Inspect control board connections.
  • Check for moisture damage on PCB.
  • Replace main board if error persists.
E15
Outdoor Unit Protection Mode
  • Turn off system for safety reset.
  • Check outdoor unit ventilation.
  • Inspect compressor and fan condition.
  • Restart after cooling period.

Frequently Asked Questions


Why does my Whirlpool air conditioner show system messages or error codes?
System messages on a :contentReference[oaicite:0]{index=0} air conditioner usually indicate issues with temperature sensors, airflow blockage, fan motor faults, refrigerant pressure problems, compressor overload protection, or control board communication errors. Restart the unit and check filters, airflow, and power supply if the message persists.
Why does my Whirlpool air conditioner stop working suddenly?
Sudden shutdowns may be caused by overheating protection, unstable voltage, dirty filters, blocked condenser coils, faulty sensors, or compressor overload. Turn off the unit, allow it to cool, then restart after checking power and airflow.
Why is my Whirlpool air conditioner not cooling properly?
Poor cooling may be caused by dirty air filters, low refrigerant, blocked airflow, faulty thermostat, or compressor issues. Clean filters, ensure proper ventilation, and verify temperature settings.
Why is my air conditioner blowing warm air?
Warm air output may indicate low refrigerant, compressor failure, incorrect mode settings, or dirty condenser coils. Switch to cooling mode and inspect airflow and coils.
Why is airflow weak or inconsistent in my Whirlpool AC?
Weak airflow is commonly caused by clogged filters, blocked vents, dirty blower fan, or failing fan motor. Clean filters regularly and ensure nothing obstructs air circulation.
Why is my AC making unusual noises?
Noise may come from loose fan blades, debris inside the unit, worn motor bearings, or compressor vibration. Turn off the unit and inspect internal components.
Why does my Whirlpool air conditioner show sensor errors?
Sensor errors may be caused by faulty thermistors, loose wiring, moisture damage, or control board communication faults. Inspect sensor connections and restart the system.
Why is room temperature not accurate?
Inaccurate readings may result from dirty sensors, poor airflow around the unit, or faulty temperature probes. Clean sensor area and ensure proper installation.
Why is the compressor not turning on?
Compressor failure may be caused by overload protection, capacitor issues, relay failure, or power supply problems. Check electrical components and allow the unit to reset.
Why is my AC running continuously?
Continuous operation may be caused by dirty coils, incorrect temperature settings, refrigerant issues, or faulty thermostat. Clean coils and adjust settings properly.
Why does my Whirlpool air conditioner keep restarting?
This may be caused by unstable voltage, loose wiring, faulty PCB, or overloaded circuits. Avoid extension cords and ensure stable power supply.
Why does my AC not turn on at all?
Check circuit breaker, remote batteries, power outlet, internal fuse, and control board. Power issues are the most common cause of no-start problems.
How do I reset Whirlpool air conditioner system messages?
Turn off the unit, unplug or switch off power for 5–10 minutes, then restart. This clears temporary system faults and resets the control board.
When should I service my Whirlpool air conditioner?
Service is recommended if cooling fails, airflow is weak, error codes persist, unusual noises continue, or the unit repeatedly shuts down after resets.
Important: Whirlpool air conditioner system messages are designed to protect key components such as the compressor, fan motors, temperature sensors, airflow system, refrigerant circuit, and control board. If problems continue after troubleshooting, disconnect power and contact a qualified HVAC technician.