Coleman
Coleman 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
Coleman digital air conditioner shuts down and displays E1 on the thermostat or control board; unit may not respond to temperature changes.
Indoor Ambient Temperature Sensor Fault
E2
Coleman air conditioner displays E2 and may run briefly then shut down; cooling performance is erratic.
Evaporator Coil Temperature Sensor Fault
E3
Coleman air conditioner shows E3 and may shut down on high pressure; outdoor fan may or may not be running.
High-Pressure Protection / High Discharge Temperature Fault
E4
Coleman air conditioner displays E4 and may stop cooling; sometimes accompanied by ice on the indoor coil or suction line.
Low-Pressure / Evaporator Freeze Protection Fault
E5
Coleman air conditioner shows E5 and will not start or stops shortly after starting; may indicate communication issues between indoor and outdoor units.
Communication Fault Between Indoor Control Board and Outdoor Control Board
E6
Coleman air conditioner displays E6 and the compressor does not start or shuts down quickly.
Compressor Overload / Current Protection Fault
E7
Coleman air conditioner control shows E7 and the system may not respond to thermostat commands or may operate in the wrong mode.
Thermostat / User Interface Communication Error
E8
Coleman air conditioner displays E8 and may shut down due to over-temperature or over-current conditions.
System Overload / Overheat Protection
E9
Coleman air conditioner shows E9 and may not start; often associated with low-voltage or power supply problems.
Low Voltage / Power Supply Fault
F1
Coleman RV rooftop air conditioner control shows F1 and the unit will not respond to thermostat commands.
Indoor Temperature Sensor Failure (RV Rooftop Series)
F2
Coleman RV rooftop air conditioner displays F2 and may shut down or fail to start the compressor.
Evaporator Freeze Sensor Fault (RV Rooftop Series)
F3
Coleman RV rooftop air conditioner shows F3 and the fan may not operate correctly or at all.
Indoor Fan Motor / Fan Feedback Fault
F4
Coleman RV rooftop air conditioner displays F4 and the outdoor (condenser) fan may not run or may run erratically.
Condenser Fan Motor Fault (RV Rooftop Series)
F5
Coleman RV rooftop air conditioner shows F5 and the compressor does not start or cycles off quickly.
Compressor Overload / Protection Trip (RV Rooftop Series)
F6
Coleman RV rooftop air conditioner displays F6 and may not respond correctly to thermostat commands or may operate in the wrong mode.
Communication Error Between Ceiling Assembly and Wall Thermostat
F7
Coleman RV rooftop air conditioner shows F7 and the heat pump or electric heat strip may not operate correctly (if equipped).
Reversing Valve / Heat Mode Control Fault
H1
Coleman air conditioner thermostat or control shows H1 and the unit may shut down or limit operation.
High Temperature Lockout / Overheat Protection
H2
Coleman air conditioner displays H2 and may not start the compressor in heating or cooling mode (for heat pump models).
Defrost / Outdoor Coil Temperature Sensor Fault
H3
Coleman heat pump air conditioner shows H3 and may shut down heating operation during cold weather.
Defrost Cycle Failure / Excessive Frost on Outdoor Coil
Symptom
Coleman air conditioner blows warm air instead of cool air in cooling mode.
No Cooling / Warm Air Discharge
Symptom
Coleman air conditioner causes lights to dim or breakers to trip when starting.
High Inrush Current / Electrical Supply Issue
Symptom
Coleman air conditioner emits a musty or moldy odor when it starts.
Biological Growth on Evaporator Coil or Drain Pan
Symptom
Coleman air conditioner fan does not start unless manually pushed, then runs slowly.
Weak Fan Motor or Capacitor
Symptom
Coleman air conditioner fan runs but there is a strong burning or electrical smell.
Overheating Electrical Component
Symptom
Coleman air conditioner frequently freezes up, with ice forming on the indoor coil or suction line.
Evaporator Coil Icing
Symptom
Coleman air conditioner indoor unit makes a loud squealing or screeching noise when running.
Indoor Blower Mechanical Noise
Symptom
Coleman air conditioner outdoor unit does not run, but indoor blower operates normally.
Outdoor Unit Non-Operation
Symptom
Coleman air conditioner outdoor unit is very loud, with rattling or grinding noises during operation.
Outdoor Mechanical Noise / Vibration
Symptom
Coleman air conditioner outdoor unit runs but indoor blower does not; little or no air from vents.
Indoor Blower Failure
Symptom
Coleman air conditioner produces water leaking from the indoor unit or ceiling area.
Condensate Drainage Failure
Symptom
Coleman air conditioner runs but does not cool the space adequately; supply air feels only slightly cooler than room air.
Insufficient Cooling Capacity / Underperformance
Symptom
Coleman air conditioner runs continuously and rarely shuts off, even when the set temperature is reached.
Continuous Operation / Control or Capacity Problem
Symptom
Coleman air conditioner short cycles, turning on and off frequently without reaching set temperature.
Short Cycling / Control or Capacity Issue
Symptom
Coleman air conditioner thermostat display is blank or flickering; system may not respond.
Thermostat Power Loss
Symptom
Coleman air conditioner trips the breaker immediately or shortly after starting.
Overcurrent / Short Circuit
Symptom
Coleman air conditioner will not start at all; thermostat is calling for cooling but nothing happens.
No-Start Condition / Control Circuit Failure
Symptom
Coleman RV rooftop air conditioner cycles on and off due to water dripping from the ceiling assembly.
RV Condensate Management / Roof Gasket Leak
Symptom
Coleman RV rooftop air conditioner runs but airflow inside the RV is weak.
Restricted Airflow in RV Ceiling Assembly
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Coleman digital air conditioner shuts down and displays E1 on the thermostat or control board; unit may not respond to temperature changes.
|
Indoor Ambient Temperature Sensor Fault | View Details |
| E2 |
Coleman air conditioner displays E2 and may run briefly then shut down; cooling performance is erratic.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Coleman air conditioner shows E3 and may shut down on high pressure; outdoor fan may or may not be running.
|
High-Pressure Protection / High Discharge Temperature Fault | View Details |
| E4 |
Coleman air conditioner displays E4 and may stop cooling; sometimes accompanied by ice on the indoor coil or suction line.
|
Low-Pressure / Evaporator Freeze Protection Fault | View Details |
| E5 |
Coleman air conditioner shows E5 and will not start or stops shortly after starting; may indicate communication issues between indoor and outdoor units.
|
Communication Fault Between Indoor Control Board and Outdoor Control Board | View Details |
| E6 |
Coleman air conditioner displays E6 and the compressor does not start or shuts down quickly.
|
Compressor Overload / Current Protection Fault | View Details |
| E7 |
Coleman air conditioner control shows E7 and the system may not respond to thermostat commands or may operate in the wrong mode.
|
Thermostat / User Interface Communication Error | View Details |
| E8 |
Coleman air conditioner displays E8 and may shut down due to over-temperature or over-current conditions.
|
System Overload / Overheat Protection | View Details |
| E9 |
Coleman air conditioner shows E9 and may not start; often associated with low-voltage or power supply problems.
|
Low Voltage / Power Supply Fault | View Details |
| F1 |
Coleman RV rooftop air conditioner control shows F1 and the unit will not respond to thermostat commands.
|
Indoor Temperature Sensor Failure (RV Rooftop Series) | View Details |
| F2 |
Coleman RV rooftop air conditioner displays F2 and may shut down or fail to start the compressor.
|
Evaporator Freeze Sensor Fault (RV Rooftop Series) | View Details |
| F3 |
Coleman RV rooftop air conditioner shows F3 and the fan may not operate correctly or at all.
|
Indoor Fan Motor / Fan Feedback Fault | View Details |
| F4 |
Coleman RV rooftop air conditioner displays F4 and the outdoor (condenser) fan may not run or may run erratically.
|
Condenser Fan Motor Fault (RV Rooftop Series) | View Details |
| F5 |
Coleman RV rooftop air conditioner shows F5 and the compressor does not start or cycles off quickly.
|
Compressor Overload / Protection Trip (RV Rooftop Series) | View Details |
| F6 |
Coleman RV rooftop air conditioner displays F6 and may not respond correctly to thermostat commands or may operate in the wrong mode.
|
Communication Error Between Ceiling Assembly and Wall Thermostat | View Details |
| F7 |
Coleman RV rooftop air conditioner shows F7 and the heat pump or electric heat strip may not operate correctly (if equipped).
|
Reversing Valve / Heat Mode Control Fault | View Details |
| H1 |
Coleman air conditioner thermostat or control shows H1 and the unit may shut down or limit operation.
|
High Temperature Lockout / Overheat Protection | View Details |
| H2 |
Coleman air conditioner displays H2 and may not start the compressor in heating or cooling mode (for heat pump models).
|
Defrost / Outdoor Coil Temperature Sensor Fault | View Details |
| H3 |
Coleman heat pump air conditioner shows H3 and may shut down heating operation during cold weather.
|
Defrost Cycle Failure / Excessive Frost on Outdoor Coil | View Details |
| – |
Coleman air conditioner blows warm air instead of cool air in cooling mode.
|
No Cooling / Warm Air Discharge | View Details |
| – |
Coleman air conditioner causes lights to dim or breakers to trip when starting.
|
High Inrush Current / Electrical Supply Issue | View Details |
| – |
Coleman air conditioner emits a musty or moldy odor when it starts.
|
Biological Growth on Evaporator Coil or Drain Pan | View Details |
| – |
Coleman air conditioner fan does not start unless manually pushed, then runs slowly.
|
Weak Fan Motor or Capacitor | View Details |
| – |
Coleman air conditioner fan runs but there is a strong burning or electrical smell.
|
Overheating Electrical Component | View Details |
| – |
Coleman air conditioner frequently freezes up, with ice forming on the indoor coil or suction line.
|
Evaporator Coil Icing | View Details |
| – |
Coleman air conditioner indoor unit makes a loud squealing or screeching noise when running.
|
Indoor Blower Mechanical Noise | View Details |
| – |
Coleman air conditioner outdoor unit does not run, but indoor blower operates normally.
|
Outdoor Unit Non-Operation | View Details |
| – |
Coleman air conditioner outdoor unit is very loud, with rattling or grinding noises during operation.
|
Outdoor Mechanical Noise / Vibration | View Details |
| – |
Coleman air conditioner outdoor unit runs but indoor blower does not; little or no air from vents.
|
Indoor Blower Failure | View Details |
| – |
Coleman air conditioner produces water leaking from the indoor unit or ceiling area.
|
Condensate Drainage Failure | View Details |
| – |
Coleman air conditioner runs but does not cool the space adequately; supply air feels only slightly cooler than room air.
|
Insufficient Cooling Capacity / Underperformance | View Details |
| – |
Coleman air conditioner runs continuously and rarely shuts off, even when the set temperature is reached.
|
Continuous Operation / Control or Capacity Problem | View Details |
| – |
Coleman air conditioner short cycles, turning on and off frequently without reaching set temperature.
|
Short Cycling / Control or Capacity Issue | View Details |
| – |
Coleman air conditioner thermostat display is blank or flickering; system may not respond.
|
Thermostat Power Loss | View Details |
| – |
Coleman air conditioner trips the breaker immediately or shortly after starting.
|
Overcurrent / Short Circuit | View Details |
| – |
Coleman air conditioner will not start at all; thermostat is calling for cooling but nothing happens.
|
No-Start Condition / Control Circuit Failure | View Details |
| – |
Coleman RV rooftop air conditioner cycles on and off due to water dripping from the ceiling assembly.
|
RV Condensate Management / Roof Gasket Leak | View Details |
| – |
Coleman RV rooftop air conditioner runs but airflow inside the RV is weak.
|
Restricted Airflow in RV Ceiling Assembly | View Details |
No matching codes found
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