Kospel
Kospel Furnaces Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Furnace does not start; display shows E01 immediately after a call for heat.
No Flame Detected on Ignition
E02
Furnace attempts to start but locks out with E02; fan may run briefly, but no flame is established.
Ignition Failure / No Gas Flow
E03
Furnace shuts down shortly after ignition; display shows E03 and burner stops.
Flame Loss During Operation
E04
Furnace will not start; display shows E04 and the combustion fan may not run.
Flue Gas Fan / Combustion Fan Failure
E05
Furnace locks out with E05; burner does not start and you may hear the fan running only.
Air Pressure Switch / Differential Pressure Fault
E06
Display shows E06 and the furnace stops; may occur during operation or startup.
Overheat / Safety Thermostat Tripped
E07
Furnace shows E07 and will not operate; may be accompanied by unusual temperature readings.
Flow Temperature Sensor Fault (NTC Open/Short)
E08
Display shows E08; furnace may run at reduced output or shut down.
Return Temperature Sensor Fault (NTC Open/Short)
E09
Furnace displays E09 and stops; may occur when domestic hot water is drawn (on combi models).
DHW Temperature Sensor Fault
E10
Furnace shows E10; no heating, and the system pressure gauge may read low.
Low Water Pressure / Water Pressure Switch Open
E11
Furnace displays E11 and shuts down; may be associated with very high temperature readings.
Overtemperature Lockout / Flow NTC Overrange
E12
Furnace shows E12; burner does not start and fan may run briefly.
Flue Gas Temperature Sensor Fault
E13
Display shows E13; furnace may shut down during operation, especially at high load.
Flue Gas Overtemperature
E14
Furnace shows E14 and will not start; may appear after power surges or wiring work.
Communication Error Between Control Board and User Interface
E15
Furnace displays E15; no heating or DHW operation.
Gas Valve Circuit Error
E16
Furnace shows E16; may occur intermittently during operation.
Circulation Pump Fault / Pump Feedback Error
E17
Display shows E17; furnace may not respond to thermostat or room controller.
Room Thermostat / External Control Fault
E18
Furnace shows E18; may be accompanied by erratic temperature readings or frequent cycling.
Outdoor Temperature Sensor Fault (if equipped)
E19
Display shows E19; furnace may not modulate correctly or may shut down.
Fan Speed / RPM Feedback Error
E20
Furnace shows E20; no response to user inputs or random resets.
Internal Control Board Error / EEPROM Fault
Symptom
Condensate water backs up or drips from unintended places around a condensing Kospel furnace.
Condensate Drain Blockage
Symptom
Domestic hot water temperature fluctuates or runs hot then cold on a Kospel combi furnace.
Unstable DHW Temperature
Symptom
Furnace display is on but does not respond to button presses or changes settings erratically.
User Interface / Keypad Failure
Symptom
Furnace emits a burning smell or plastic odor when running.
Overheating Electrical Component or Dust Burn-Off
Symptom
Furnace frequently starts and stops (short cycling) even when heating demand is constant.
Short Cycling
Symptom
Furnace is noisy during operation; whistling, roaring, or droning sounds from the burner area.
Combustion Noise / Burner Instability
Symptom
Furnace runs but house is not heating adequately; radiators or underfloor loops are lukewarm.
Insufficient Heat Output / Underheating
Symptom
Furnace runs continuously and overshoots the room temperature set on the thermostat.
Overheating / Thermostat Control Issue
Symptom
Furnace starts but shuts down after a few seconds without showing an error code.
Early Flame Failure or Safety Interlock Trip
Symptom
Furnace vibrates excessively or rattles during operation.
Mechanical Vibration / Loose Mounting
Symptom
Furnace will not start at all; display is blank and no lights are on.
No Power / Dead Unit
Symptom
Kospel furnace frequently needs manual resetting to restore operation, even though it eventually runs.
Intermittent Lockouts
Symptom
Radiators on upper floors are cold while lower floors heat normally.
Air Lock / Poor Circulation to Upper Levels
Symptom
Safety relief valve on the furnace frequently discharges water.
Overpressure / Expansion Vessel Failure
Symptom
Water leaking from the bottom of the Kospel furnace or from internal components.
Internal Water Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Furnace does not start; display shows E01 immediately after a call for heat.
|
No Flame Detected on Ignition | View Details |
| E02 |
Furnace attempts to start but locks out with E02; fan may run briefly, but no flame is established.
|
Ignition Failure / No Gas Flow | View Details |
| E03 |
Furnace shuts down shortly after ignition; display shows E03 and burner stops.
|
Flame Loss During Operation | View Details |
| E04 |
Furnace will not start; display shows E04 and the combustion fan may not run.
|
Flue Gas Fan / Combustion Fan Failure | View Details |
| E05 |
Furnace locks out with E05; burner does not start and you may hear the fan running only.
|
Air Pressure Switch / Differential Pressure Fault | View Details |
| E06 |
Display shows E06 and the furnace stops; may occur during operation or startup.
|
Overheat / Safety Thermostat Tripped | View Details |
| E07 |
Furnace shows E07 and will not operate; may be accompanied by unusual temperature readings.
|
Flow Temperature Sensor Fault (NTC Open/Short) | View Details |
| E08 |
Display shows E08; furnace may run at reduced output or shut down.
|
Return Temperature Sensor Fault (NTC Open/Short) | View Details |
| E09 |
Furnace displays E09 and stops; may occur when domestic hot water is drawn (on combi models).
|
DHW Temperature Sensor Fault | View Details |
| E10 |
Furnace shows E10; no heating, and the system pressure gauge may read low.
|
Low Water Pressure / Water Pressure Switch Open | View Details |
| E11 |
Furnace displays E11 and shuts down; may be associated with very high temperature readings.
|
Overtemperature Lockout / Flow NTC Overrange | View Details |
| E12 |
Furnace shows E12; burner does not start and fan may run briefly.
|
Flue Gas Temperature Sensor Fault | View Details |
| E13 |
Display shows E13; furnace may shut down during operation, especially at high load.
|
Flue Gas Overtemperature | View Details |
| E14 |
Furnace shows E14 and will not start; may appear after power surges or wiring work.
|
Communication Error Between Control Board and User Interface | View Details |
| E15 |
Furnace displays E15; no heating or DHW operation.
|
Gas Valve Circuit Error | View Details |
| E16 |
Furnace shows E16; may occur intermittently during operation.
|
Circulation Pump Fault / Pump Feedback Error | View Details |
| E17 |
Display shows E17; furnace may not respond to thermostat or room controller.
|
Room Thermostat / External Control Fault | View Details |
| E18 |
Furnace shows E18; may be accompanied by erratic temperature readings or frequent cycling.
|
Outdoor Temperature Sensor Fault (if equipped) | View Details |
| E19 |
Display shows E19; furnace may not modulate correctly or may shut down.
|
Fan Speed / RPM Feedback Error | View Details |
| E20 |
Furnace shows E20; no response to user inputs or random resets.
|
Internal Control Board Error / EEPROM Fault | View Details |
| – |
Condensate water backs up or drips from unintended places around a condensing Kospel furnace.
|
Condensate Drain Blockage | View Details |
| – |
Domestic hot water temperature fluctuates or runs hot then cold on a Kospel combi furnace.
|
Unstable DHW Temperature | View Details |
| – |
Furnace display is on but does not respond to button presses or changes settings erratically.
|
User Interface / Keypad Failure | View Details |
| – |
Furnace emits a burning smell or plastic odor when running.
|
Overheating Electrical Component or Dust Burn-Off | View Details |
| – |
Furnace frequently starts and stops (short cycling) even when heating demand is constant.
|
Short Cycling | View Details |
| – |
Furnace is noisy during operation; whistling, roaring, or droning sounds from the burner area.
|
Combustion Noise / Burner Instability | View Details |
| – |
Furnace runs but house is not heating adequately; radiators or underfloor loops are lukewarm.
|
Insufficient Heat Output / Underheating | View Details |
| – |
Furnace runs continuously and overshoots the room temperature set on the thermostat.
|
Overheating / Thermostat Control Issue | View Details |
| – |
Furnace starts but shuts down after a few seconds without showing an error code.
|
Early Flame Failure or Safety Interlock Trip | View Details |
| – |
Furnace vibrates excessively or rattles during operation.
|
Mechanical Vibration / Loose Mounting | View Details |
| – |
Furnace will not start at all; display is blank and no lights are on.
|
No Power / Dead Unit | View Details |
| – |
Kospel furnace frequently needs manual resetting to restore operation, even though it eventually runs.
|
Intermittent Lockouts | View Details |
| – |
Radiators on upper floors are cold while lower floors heat normally.
|
Air Lock / Poor Circulation to Upper Levels | View Details |
| – |
Safety relief valve on the furnace frequently discharges water.
|
Overpressure / Expansion Vessel Failure | View Details |
| – |
Water leaking from the bottom of the Kospel furnace or from internal components.
|
Internal Water Leak | View Details |
No matching codes found
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