Remeha
Remeha Boilers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E0
The boiler displays E0 and will not start heating or hot water.
No Flame Detected / Ignition Lockout
E1
The boiler shows E1 and shuts down shortly after starting.
Overheat / Safety Temperature Limiter Activated
E10
Boiler displays E10 and will not start central heating.
No Circulation / Pump or Flow Switch Fault
E11
Boiler displays E11 and locks out during hot water demand.
DHW Flow Detection Fault
E12
Boiler displays E12 and stops.
Communication Error Between Display and Main PCB
E13
Boiler displays E13 and will not operate.
External Sensor or Weather Compensation Fault
E14
Boiler displays E14 and locks out.
Condensate drain fault / blocked condensate trap
E15
Boiler shows E15 and stops heating.
Internal leak / low water content detected
E16
Boiler displays E16 and will not start.
Incorrect configuration or parameter error
E17
Boiler shows E17 and cycles on and off rapidly.
Sensor mismatch / temperature differential error
E18
Boiler displays E18 and will not fire for heating.
Room thermostat / control signal fault
E19
Boiler shows E19 and locks out.
Internal communication or safety chain fault
E2
The boiler displays E2 and does not fire.
Flow Temperature Sensor (NTC) Fault
E3
The boiler shows E3 and locks out.
Return Temperature Sensor (NTC) Fault
E4
Boiler displays E4 and will not operate.
Domestic Hot Water (DHW) Sensor Fault
E5
Boiler displays E5 and stops, often during operation.
Flue Gas Temperature Too High / Flue Sensor Fault
E6
Boiler displays E6 and will not start.
Fan or Air Pressure Fault
E7
Boiler displays E7 and locks out intermittently.
Flame Detection Error / Flame Signal Lost During Operation
E8
Boiler displays E8 and will not fire.
Gas Valve or Gas Supply Fault
E9
Boiler displays E9 and shuts down.
Water Pressure or Flow Fault (Low Water Content)
Symptom
Boiler condensate pipe repeatedly freezes in cold weather.
Condensate discharge freezing
Symptom
Boiler cycles on and off frequently without reaching the set temperature.
Short cycling
Symptom
Boiler display is blank but the pump or fan occasionally runs.
User interface / display failure
Symptom
Boiler does not respond to room thermostat or programmer.
Control signal failure
Symptom
Boiler does not start at all; no lights or display.
No electrical power to boiler
Symptom
Boiler flue drips water externally or shows staining on the wall.
Condensate leakage from flue
Symptom
Boiler frequently loses pressure and needs topping up every few days.
Chronic pressure loss
Symptom
Boiler ignites, but then shuts down after a few seconds.
Flame instability / poor combustion
Symptom
Boiler is very noisy, with whirring or grinding sounds.
Mechanical noise from fan or pump
Symptom
Boiler leaking water from underneath the casing.
Internal water leak
Symptom
Boiler makes loud banging or knocking noises (kettling) during operation.
Boiler kettling / localised boiling in heat exchanger
Symptom
Boiler provides hot water but no central heating on a combi or system boiler.
No CH output
Symptom
Boiler runs for heating, but there is no domestic hot water on a combi model.
No DHW production
Symptom
Boiler runs, but hot water temperature fluctuates or goes cold then hot.
Unstable DHW temperature control
Symptom
Boiler runs, but some radiators stay cold.
Poor circulation / system imbalance
Symptom
Boiler smells of burning plastic or electrical burning.
Overheating electrical component
Symptom
Boiler smells of gas around the casing or flue area.
Gas leak or combustion leak
Symptom
Radiators are hot at the top but cold at the bottom.
Sludge accumulation in radiators
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E0 |
The boiler displays E0 and will not start heating or hot water.
|
No Flame Detected / Ignition Lockout | View Details |
| E1 |
The boiler shows E1 and shuts down shortly after starting.
|
Overheat / Safety Temperature Limiter Activated | View Details |
| E10 |
Boiler displays E10 and will not start central heating.
|
No Circulation / Pump or Flow Switch Fault | View Details |
| E11 |
Boiler displays E11 and locks out during hot water demand.
|
DHW Flow Detection Fault | View Details |
| E12 |
Boiler displays E12 and stops.
|
Communication Error Between Display and Main PCB | View Details |
| E13 |
Boiler displays E13 and will not operate.
|
External Sensor or Weather Compensation Fault | View Details |
| E14 |
Boiler displays E14 and locks out.
|
Condensate drain fault / blocked condensate trap | View Details |
| E15 |
Boiler shows E15 and stops heating.
|
Internal leak / low water content detected | View Details |
| E16 |
Boiler displays E16 and will not start.
|
Incorrect configuration or parameter error | View Details |
| E17 |
Boiler shows E17 and cycles on and off rapidly.
|
Sensor mismatch / temperature differential error | View Details |
| E18 |
Boiler displays E18 and will not fire for heating.
|
Room thermostat / control signal fault | View Details |
| E19 |
Boiler shows E19 and locks out.
|
Internal communication or safety chain fault | View Details |
| E2 |
The boiler displays E2 and does not fire.
|
Flow Temperature Sensor (NTC) Fault | View Details |
| E3 |
The boiler shows E3 and locks out.
|
Return Temperature Sensor (NTC) Fault | View Details |
| E4 |
Boiler displays E4 and will not operate.
|
Domestic Hot Water (DHW) Sensor Fault | View Details |
| E5 |
Boiler displays E5 and stops, often during operation.
|
Flue Gas Temperature Too High / Flue Sensor Fault | View Details |
| E6 |
Boiler displays E6 and will not start.
|
Fan or Air Pressure Fault | View Details |
| E7 |
Boiler displays E7 and locks out intermittently.
|
Flame Detection Error / Flame Signal Lost During Operation | View Details |
| E8 |
Boiler displays E8 and will not fire.
|
Gas Valve or Gas Supply Fault | View Details |
| E9 |
Boiler displays E9 and shuts down.
|
Water Pressure or Flow Fault (Low Water Content) | View Details |
| – |
Boiler condensate pipe repeatedly freezes in cold weather.
|
Condensate discharge freezing | View Details |
| – |
Boiler cycles on and off frequently without reaching the set temperature.
|
Short cycling | View Details |
| – |
Boiler display is blank but the pump or fan occasionally runs.
|
User interface / display failure | View Details |
| – |
Boiler does not respond to room thermostat or programmer.
|
Control signal failure | View Details |
| – |
Boiler does not start at all; no lights or display.
|
No electrical power to boiler | View Details |
| – |
Boiler flue drips water externally or shows staining on the wall.
|
Condensate leakage from flue | View Details |
| – |
Boiler frequently loses pressure and needs topping up every few days.
|
Chronic pressure loss | View Details |
| – |
Boiler ignites, but then shuts down after a few seconds.
|
Flame instability / poor combustion | View Details |
| – |
Boiler is very noisy, with whirring or grinding sounds.
|
Mechanical noise from fan or pump | View Details |
| – |
Boiler leaking water from underneath the casing.
|
Internal water leak | View Details |
| – |
Boiler makes loud banging or knocking noises (kettling) during operation.
|
Boiler kettling / localised boiling in heat exchanger | View Details |
| – |
Boiler provides hot water but no central heating on a combi or system boiler.
|
No CH output | View Details |
| – |
Boiler runs for heating, but there is no domestic hot water on a combi model.
|
No DHW production | View Details |
| – |
Boiler runs, but hot water temperature fluctuates or goes cold then hot.
|
Unstable DHW temperature control | View Details |
| – |
Boiler runs, but some radiators stay cold.
|
Poor circulation / system imbalance | View Details |
| – |
Boiler smells of burning plastic or electrical burning.
|
Overheating electrical component | View Details |
| – |
Boiler smells of gas around the casing or flue area.
|
Gas leak or combustion leak | View Details |
| – |
Radiators are hot at the top but cold at the bottom.
|
Sludge accumulation in radiators | View Details |
No matching codes found
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