Pennco
Pennco Boilers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
Advertisements
E0
Boiler display shows E0, and the burner will not start.
No Call for Heat / Thermostat Input Fault
E1
Boiler shows E1 and will not fire; the circulator may run briefly.
Low Water Cutoff / Water Level Fault
E10
Boiler display shows E10, and the unit will not fire, often after venting changes.
Air Intake / Combustion Air Fault
E11
Boiler shows E11 and cycles off quickly after starting.
Return Temperature Sensor Fault
E12
Boiler display shows E12, and the unit may short-cycle or not modulate correctly.
Supply Temperature Sensor Fault
E13
Boiler shows E13 and may lock out during operation.
Outdoor Reset Sensor Fault
E14
Boiler display shows E14, and the burner output seems incorrect.
Modulation / Fan Speed Control Fault
E15
Boiler shows E15 and will not start, often after wiring changes.
Polarity / Line Voltage Fault
E16
Boiler display shows E16 and unit may shut down intermittently.
Condensate Level / Float Switch Fault (Condensing Models)
E17
Boiler shows E17 and may not respond to thermostat.
Communication Fault (Control to User Interface or Add-on Module)
E18
Boiler display shows E18, and burner output is limited.
Return Temperature Too Low / Condensation Protection
E19
Boiler shows E19 and may shut down during domestic hot water production (combi or indirect setups).
Domestic Hot Water Sensor / Priority Fault
E2
Boiler display shows E2, and the burner does not ignite.
Flame Failure / Ignition Lockout
E3
Boiler shows E3 and shuts down shortly after starting.
High Limit Temperature Lockout
E4
Boiler display shows E4, and the burner will not start; the fan may run briefly on condensing models.
Flue Gas / Exhaust Pressure Fault
E5
Boiler shows E5 and shuts down, often accompanied by gurgling sounds.
Low System Pressure / Pressure Switch Fault
E6
Boiler display shows E6, and the burner will not ignite, often after several failed attempts.
Ignition Lockout / No Flame Detected
E7
Boiler shows E7 and shuts down; the fan may continue to run.
Flame Detected with No Call for Heat
E8
Boiler display shows E8, and the unit will not start, often after power issues.
Internal Control Board Fault / EEPROM Error
E9
Boiler shows E9 and shuts down, often with a high temperature reading.
Overheat / Safety Thermostat Trip
Symptom
Boiler area smells like exhaust or fumes
Flue Gas Spillage / Venting Problem
Symptom
Boiler cabinet or nearby piping vibrates excessively during operation
Mechanical Vibration / Pump or Fan Imbalance
Symptom
Boiler cycles on and off rapidly when only one small zone calls
Micro-Zoning / Flow Too Low Through Boiler
Symptom
Boiler display is blank or unreadable but unit still runs
Display / User Interface Failure
Symptom
Boiler emits rumbling or roaring noise from burner area
Combustion Instability / Dirty Burner
Symptom
Boiler frequently needs manual reset to operate
Nuisance Lockouts / Underlying Fault Not Corrected
Symptom
Boiler ignites but shuts off within a few seconds repeatedly
Flame Proving / Flame Sensor Issue
Symptom
Boiler lockout occurs randomly, often during windy conditions
Intermittent Venting / Pressure Switch Trips
Symptom
Boiler makes gurgling or trickling water sounds
Air in System / Poor Air Elimination
Symptom
Boiler makes loud banging or knocking noises (kettling) during operation.
Kettling / Boiling in Heat Exchanger
Symptom
Boiler or nearby piping is leaking water.
System Leak / Component Failure
Symptom
Boiler produces soot or black staining around vent
Sooting / Incomplete Combustion
Symptom
Boiler runs but house never reaches set temperature
Insufficient Heat Output
Symptom
Boiler runs continuously even when thermostat is satisfied
Stuck Relay / Control Fault
Symptom
Boiler runs, but radiators or baseboards stay cold.
No Circulation / Circulator Pump Failure
Symptom
Boiler short cycles (turns on and off frequently) without satisfying the thermostat.
Short Cycling / Improper Control or Sizing
Symptom
Boiler smells like gas near the unit
Gas Leak at Boiler
Symptom
Boiler will not start at all; no lights or display.
No Power to Boiler
Symptom
Pressure relief valve discharges water periodically.
Overpressure / Expansion Tank Failure
Symptom
Some radiators or zones heat, others stay cold
Zone Imbalance / Zone Valve or Air Problem
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E0 |
Boiler display shows E0, and the burner will not start.
|
No Call for Heat / Thermostat Input Fault | View Details |
| E1 |
Boiler shows E1 and will not fire; the circulator may run briefly.
|
Low Water Cutoff / Water Level Fault | View Details |
| E10 |
Boiler display shows E10, and the unit will not fire, often after venting changes.
|
Air Intake / Combustion Air Fault | View Details |
| E11 |
Boiler shows E11 and cycles off quickly after starting.
|
Return Temperature Sensor Fault | View Details |
| E12 |
Boiler display shows E12, and the unit may short-cycle or not modulate correctly.
|
Supply Temperature Sensor Fault | View Details |
| E13 |
Boiler shows E13 and may lock out during operation.
|
Outdoor Reset Sensor Fault | View Details |
| E14 |
Boiler display shows E14, and the burner output seems incorrect.
|
Modulation / Fan Speed Control Fault | View Details |
| E15 |
Boiler shows E15 and will not start, often after wiring changes.
|
Polarity / Line Voltage Fault | View Details |
| E16 |
Boiler display shows E16 and unit may shut down intermittently.
|
Condensate Level / Float Switch Fault (Condensing Models) | View Details |
| E17 |
Boiler shows E17 and may not respond to thermostat.
|
Communication Fault (Control to User Interface or Add-on Module) | View Details |
| E18 |
Boiler display shows E18, and burner output is limited.
|
Return Temperature Too Low / Condensation Protection | View Details |
| E19 |
Boiler shows E19 and may shut down during domestic hot water production (combi or indirect setups).
|
Domestic Hot Water Sensor / Priority Fault | View Details |
| E2 |
Boiler display shows E2, and the burner does not ignite.
|
Flame Failure / Ignition Lockout | View Details |
| E3 |
Boiler shows E3 and shuts down shortly after starting.
|
High Limit Temperature Lockout | View Details |
| E4 |
Boiler display shows E4, and the burner will not start; the fan may run briefly on condensing models.
|
Flue Gas / Exhaust Pressure Fault | View Details |
| E5 |
Boiler shows E5 and shuts down, often accompanied by gurgling sounds.
|
Low System Pressure / Pressure Switch Fault | View Details |
| E6 |
Boiler display shows E6, and the burner will not ignite, often after several failed attempts.
|
Ignition Lockout / No Flame Detected | View Details |
| E7 |
Boiler shows E7 and shuts down; the fan may continue to run.
|
Flame Detected with No Call for Heat | View Details |
| E8 |
Boiler display shows E8, and the unit will not start, often after power issues.
|
Internal Control Board Fault / EEPROM Error | View Details |
| E9 |
Boiler shows E9 and shuts down, often with a high temperature reading.
|
Overheat / Safety Thermostat Trip | View Details |
| – |
Boiler area smells like exhaust or fumes
|
Flue Gas Spillage / Venting Problem | View Details |
| – |
Boiler cabinet or nearby piping vibrates excessively during operation
|
Mechanical Vibration / Pump or Fan Imbalance | View Details |
| – |
Boiler cycles on and off rapidly when only one small zone calls
|
Micro-Zoning / Flow Too Low Through Boiler | View Details |
| – |
Boiler display is blank or unreadable but unit still runs
|
Display / User Interface Failure | View Details |
| – |
Boiler emits rumbling or roaring noise from burner area
|
Combustion Instability / Dirty Burner | View Details |
| – |
Boiler frequently needs manual reset to operate
|
Nuisance Lockouts / Underlying Fault Not Corrected | View Details |
| – |
Boiler ignites but shuts off within a few seconds repeatedly
|
Flame Proving / Flame Sensor Issue | View Details |
| – |
Boiler lockout occurs randomly, often during windy conditions
|
Intermittent Venting / Pressure Switch Trips | View Details |
| – |
Boiler makes gurgling or trickling water sounds
|
Air in System / Poor Air Elimination | View Details |
| – |
Boiler makes loud banging or knocking noises (kettling) during operation.
|
Kettling / Boiling in Heat Exchanger | View Details |
| – |
Boiler or nearby piping is leaking water.
|
System Leak / Component Failure | View Details |
| – |
Boiler produces soot or black staining around vent
|
Sooting / Incomplete Combustion | View Details |
| – |
Boiler runs but house never reaches set temperature
|
Insufficient Heat Output | View Details |
| – |
Boiler runs continuously even when thermostat is satisfied
|
Stuck Relay / Control Fault | View Details |
| – |
Boiler runs, but radiators or baseboards stay cold.
|
No Circulation / Circulator Pump Failure | View Details |
| – |
Boiler short cycles (turns on and off frequently) without satisfying the thermostat.
|
Short Cycling / Improper Control or Sizing | View Details |
| – |
Boiler smells like gas near the unit
|
Gas Leak at Boiler | View Details |
| – |
Boiler will not start at all; no lights or display.
|
No Power to Boiler | View Details |
| – |
Pressure relief valve discharges water periodically.
|
Overpressure / Expansion Tank Failure | View Details |
| – |
Some radiators or zones heat, others stay cold
|
Zone Imbalance / Zone Valve or Air Problem | View Details |
No matching codes found
Advertisements