Keeprite
Keeprite Air Conditioners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Indoor wall control / thermostat displays E1 and the air conditioner will not respond to temperature changes or mode selections.
Indoor-Outdoor Communication Fault
E2
Indoor display shows E2 and the system may short cycle or shut down unexpectedly.
Indoor Temperature Sensor (Room Thermistor) Fault
E3
Keeprite indoor display shows E3 and cooling stops; outdoor unit may not run.
Indoor Coil (Evaporator) Temperature Sensor Fault
E4
System displays E4 and may shut down on high pressure; outdoor fan may continue running while compressor stops.
High-Pressure Protection / Discharge Overheat
E5
Keeprite air conditioner shows E5 and will not cool; compressor may not start.
Low-Pressure / Refrigerant Protection Fault
E6
Display shows E6 and the outdoor unit may not respond; intermittent cooling with communication loss.
Outdoor-Indoor Communication Error
E7
Keeprite system shows E7 and may not start or may shut down shortly after starting.
Mode Conflict / Indoor-Outdoor Mismatch Fault
E8
E8 displayed; system may shut down on overload, often during very hot weather or long run times.
Compressor Overload / Overcurrent Protection
E9
Keeprite control shows E9; unit may not start or may shut down quickly.
EEPROM / Control Memory Error
F1
Fault code F1 appears and the indoor fan may not run or may run erratically.
Indoor Fan Motor Fault (ECM/PSC)
F2
Fault code F2; outdoor fan may not run while compressor attempts to start.
Outdoor Fan Motor Fault
F3
Keeprite system shows F3 and cooling is disabled; may be associated with coil freeze or low airflow.
Evaporator Coil Freeze Protection / Low Airflow Fault
F4
Fault code F4; system may shut down on high discharge temperature.
Discharge Line Temperature Sensor Fault / Overheat
F5
Keeprite unit shows F5; system may not start or may shut down intermittently.
Outdoor Ambient Temperature Sensor Fault
F6
Fault code F6; compressor may not start or may trip quickly.
Compressor Current / Overload Fault
F7
Keeprite control shows F7; system may not respond to thermostat commands.
Thermostat / Wall Control Communication Fault
H1
Keeprite air conditioner displays H1; compressor may be locked out for a period.
Anti-Short-Cycle / Time Delay Protection
H2
H2 code appears; system may limit operation due to high temperature conditions.
High Temperature / Overload Warning
H3
Keeprite system shows H3 and shuts down; may restart after cooling off.
Compressor Overheat Protection
P0
Keeprite inverter-type air conditioner shows P0 and will not start or runs at reduced capacity.
DC Bus Voltage Protection (Inverter Models)
P1
P1 displayed; system may limit operation or shut down intermittently.
Low Refrigerant / System Protection (Inverter Models)
P2
Keeprite inverter unit shows P2; compressor speed may be limited.
High Discharge Temperature Protection (Inverter Models)
P3
P3 code; system may not start or may shut down during operation.
Outdoor Low-Temperature Lockout / Protection
P4
Keeprite inverter system shows P4; compressor may not run.
Inverter Module Overheat / IPM Protection
Symptom
Burning or electrical smell from indoor or outdoor Keeprite unit.
Electrical Overheating or Component Failure
Symptom
Evaporator coil or suction line is covered in ice; little or no airflow from vents.
Evaporator Coil Icing
Symptom
Indoor blower runs but outdoor Keeprite unit does not; warm air blows from vents.
Outdoor Unit Not Responding to Call for Cooling
Symptom
Indoor Keeprite air handler makes loud squealing or grinding noises when running.
Indoor Blower Mechanical Failure
Symptom
Keeprite air conditioner frequently trips the circuit breaker when starting or during operation.
Overcurrent / Short Circuit
Symptom
Keeprite air conditioner runs but does not cool well; supply air is only slightly cooler than room air.
Insufficient Cooling Capacity
Symptom
Keeprite air conditioner runs continuously and rarely shuts off, even when the set temperature is reached.
Continuous Operation / Won't Shut Off
Symptom
Keeprite air conditioner short cycles, turning on and off every few minutes.
Short Cycling
Symptom
Keeprite indoor unit frequently shuts off due to a float switch or safety device; water present in secondary drain pan.
Condensate Overflow Safety Trip
Symptom
Keeprite outdoor unit is very loud, with rattling or buzzing noises during operation.
Outdoor Mechanical Noise / Vibration
Symptom
Keeprite outdoor unit runs in cooling mode but frost or ice forms on the outdoor coil.
Outdoor Coil Frosting
Symptom
Keeprite system will not start; thermostat display is blank or flickering.
Thermostat Power Loss
Symptom
Outdoor fan runs but compressor does not start; unit hums or clicks but no cooling.
Compressor Start Failure
Symptom
Outdoor Keeprite condenser will not start at all; no fan, no compressor, and no humming when thermostat calls for cooling.
No Power to Outdoor Unit
Symptom
Strong musty or moldy odor when Keeprite air conditioner runs.
Biological Growth on Evaporator Coil or in Ducts
Symptom
Uneven cooling in the home; some rooms are too warm while others are comfortable when Keeprite A/C runs.
Air Distribution / Ductwork Imbalance
Symptom
Water leaking from indoor Keeprite air handler or from ceiling below the unit.
Condensate Drainage Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Indoor wall control / thermostat displays E1 and the air conditioner will not respond to temperature changes or mode selections.
|
Indoor-Outdoor Communication Fault | View Details |
| E2 |
Indoor display shows E2 and the system may short cycle or shut down unexpectedly.
|
Indoor Temperature Sensor (Room Thermistor) Fault | View Details |
| E3 |
Keeprite indoor display shows E3 and cooling stops; outdoor unit may not run.
|
Indoor Coil (Evaporator) Temperature Sensor Fault | View Details |
| E4 |
System displays E4 and may shut down on high pressure; outdoor fan may continue running while compressor stops.
|
High-Pressure Protection / Discharge Overheat | View Details |
| E5 |
Keeprite air conditioner shows E5 and will not cool; compressor may not start.
|
Low-Pressure / Refrigerant Protection Fault | View Details |
| E6 |
Display shows E6 and the outdoor unit may not respond; intermittent cooling with communication loss.
|
Outdoor-Indoor Communication Error | View Details |
| E7 |
Keeprite system shows E7 and may not start or may shut down shortly after starting.
|
Mode Conflict / Indoor-Outdoor Mismatch Fault | View Details |
| E8 |
E8 displayed; system may shut down on overload, often during very hot weather or long run times.
|
Compressor Overload / Overcurrent Protection | View Details |
| E9 |
Keeprite control shows E9; unit may not start or may shut down quickly.
|
EEPROM / Control Memory Error | View Details |
| F1 |
Fault code F1 appears and the indoor fan may not run or may run erratically.
|
Indoor Fan Motor Fault (ECM/PSC) | View Details |
| F2 |
Fault code F2; outdoor fan may not run while compressor attempts to start.
|
Outdoor Fan Motor Fault | View Details |
| F3 |
Keeprite system shows F3 and cooling is disabled; may be associated with coil freeze or low airflow.
|
Evaporator Coil Freeze Protection / Low Airflow Fault | View Details |
| F4 |
Fault code F4; system may shut down on high discharge temperature.
|
Discharge Line Temperature Sensor Fault / Overheat | View Details |
| F5 |
Keeprite unit shows F5; system may not start or may shut down intermittently.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| F6 |
Fault code F6; compressor may not start or may trip quickly.
|
Compressor Current / Overload Fault | View Details |
| F7 |
Keeprite control shows F7; system may not respond to thermostat commands.
|
Thermostat / Wall Control Communication Fault | View Details |
| H1 |
Keeprite air conditioner displays H1; compressor may be locked out for a period.
|
Anti-Short-Cycle / Time Delay Protection | View Details |
| H2 |
H2 code appears; system may limit operation due to high temperature conditions.
|
High Temperature / Overload Warning | View Details |
| H3 |
Keeprite system shows H3 and shuts down; may restart after cooling off.
|
Compressor Overheat Protection | View Details |
| P0 |
Keeprite inverter-type air conditioner shows P0 and will not start or runs at reduced capacity.
|
DC Bus Voltage Protection (Inverter Models) | View Details |
| P1 |
P1 displayed; system may limit operation or shut down intermittently.
|
Low Refrigerant / System Protection (Inverter Models) | View Details |
| P2 |
Keeprite inverter unit shows P2; compressor speed may be limited.
|
High Discharge Temperature Protection (Inverter Models) | View Details |
| P3 |
P3 code; system may not start or may shut down during operation.
|
Outdoor Low-Temperature Lockout / Protection | View Details |
| P4 |
Keeprite inverter system shows P4; compressor may not run.
|
Inverter Module Overheat / IPM Protection | View Details |
| – |
Burning or electrical smell from indoor or outdoor Keeprite unit.
|
Electrical Overheating or Component Failure | View Details |
| – |
Evaporator coil or suction line is covered in ice; little or no airflow from vents.
|
Evaporator Coil Icing | View Details |
| – |
Indoor blower runs but outdoor Keeprite unit does not; warm air blows from vents.
|
Outdoor Unit Not Responding to Call for Cooling | View Details |
| – |
Indoor Keeprite air handler makes loud squealing or grinding noises when running.
|
Indoor Blower Mechanical Failure | View Details |
| – |
Keeprite air conditioner frequently trips the circuit breaker when starting or during operation.
|
Overcurrent / Short Circuit | View Details |
| – |
Keeprite air conditioner runs but does not cool well; supply air is only slightly cooler than room air.
|
Insufficient Cooling Capacity | View Details |
| – |
Keeprite air conditioner runs continuously and rarely shuts off, even when the set temperature is reached.
|
Continuous Operation / Won't Shut Off | View Details |
| – |
Keeprite air conditioner short cycles, turning on and off every few minutes.
|
Short Cycling | View Details |
| – |
Keeprite indoor unit frequently shuts off due to a float switch or safety device; water present in secondary drain pan.
|
Condensate Overflow Safety Trip | View Details |
| – |
Keeprite outdoor unit is very loud, with rattling or buzzing noises during operation.
|
Outdoor Mechanical Noise / Vibration | View Details |
| – |
Keeprite outdoor unit runs in cooling mode but frost or ice forms on the outdoor coil.
|
Outdoor Coil Frosting | View Details |
| – |
Keeprite system will not start; thermostat display is blank or flickering.
|
Thermostat Power Loss | View Details |
| – |
Outdoor fan runs but compressor does not start; unit hums or clicks but no cooling.
|
Compressor Start Failure | View Details |
| – |
Outdoor Keeprite condenser will not start at all; no fan, no compressor, and no humming when thermostat calls for cooling.
|
No Power to Outdoor Unit | View Details |
| – |
Strong musty or moldy odor when Keeprite air conditioner runs.
|
Biological Growth on Evaporator Coil or in Ducts | View Details |
| – |
Uneven cooling in the home; some rooms are too warm while others are comfortable when Keeprite A/C runs.
|
Air Distribution / Ductwork Imbalance | View Details |
| – |
Water leaking from indoor Keeprite air handler or from ceiling below the unit.
|
Condensate Drainage Failure | View Details |
No matching codes found
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