BoilerFaultCodes 1 01
Overheat
Ariston E-System ONE Fault codes & diagnostics
46 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
System Natural Gas 2020-present
GC Numbers 41-116-4741-116-48
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Severity at a glance
Each cell = one fault code. Hover to identify. 3 High
4 Medium
39 Unrated
Just want the most common Ariston E-System ONE faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 46 documented codes
Tap any card for details
1 03
Insufficient circulation
1 04
Insufficient circulation
1 05
Insufficient circulation
1 06
Insufficient circulation
1 07
Insufficient circulation
1 08
Insufficient water (request filling)
1 09
System pressure > 3 bar
1 10
C.H. Flow temp. probe circuit open / short circuit
1 12
C.H. Return temp. probe circuit open / short circuit
Showing 11–20 of 46
1 14
External sensor circuit open / short circuit
1 16
floor thermostat contact open
1 18
Heating delivery probe problem
1 P1
Insufficient circulation indication
1 P2
Insufficient circulation indication
1 P3
Insufficient circulation indication
1 P4
Insufficient circulation indication
2 05
DHW In Probe Open Circuit (Solare temp. probe)
3 01
EEPROM error
3 02
Comunication error
Showing 21–30 of 46
3 03
Main P.C.B. error
3 04
Too many (> 5) resets in 15 minutes
3 05 Your boiler's internal computer is experiencing a communication error, which means it cannot operate safely and has shut down.
Your boiler's internal computer is experiencing a communication error, which means it cannot operate safely and has shut down.
Parts commonly replaced
- Main PCB
- Wiring harness
Related codes
3 06 Your boiler's internal computer is experiencing a communication error and has shut down to prevent potential system damage.
Your boiler's internal computer is experiencing a communication error and has shut down to prevent potential system damage.
Parts commonly replaced
- Main Printed Circuit Board (PCB)
Related codes
3 07
Main P.C.B. error
3 P9
Sched.Maintanace-Call Service
4 11
Room sensor circuit open or short circuit ZONA 1
4 12
Room sensor circuit open or short circuit ZONA 2
4 13
Room sensor circuit open or short circuit ZONA 3
5 01
No flame detected
Showing 31–40 of 46
5 02
Flame detected with gas valve closed
5 04
Flame lift
5 P1
1st Ignition Failed
5 P2
2nd Ignition Failed
5 P3
Flame cut-off
6 10 Your boiler has detected that it is running much hotter than it should be and has shut itself down to prevent damage.
Your boiler has detected that it is running much hotter than it should be and has shut itself down to prevent damage.
Parts commonly replaced
- NTC Temperature Sensor
- Primary Heat Exchanger
- Central Heating Pump
Related codes
6 12
Insufficient fan speed
7 01
Zone 1 send sensor defective
7 02
Zone 2 send sensor defective
7 03
Zone 3 send sensor defective
Showing 41–46 of 46
7 11 Your boiler is struggling to accurately read the temperature of the water returning from your heating system, which is preventing it from running your heating correctly.
Your boiler is struggling to accurately read the temperature of the water returning from your heating system, which is preventing it from running your heating correctly.
Parts commonly replaced
- Return NTC sensor
- Wiring harness
Related codes
7 12 Your boiler is having trouble reading the temperature in one of the secondary heating zones, which may prevent that part of your home from heating up properly.
Your boiler is having trouble reading the temperature in one of the secondary heating zones, which may prevent that part of your home from heating up properly.
Parts commonly replaced
- NTC Temperature Sensor
- Wiring harness
Related codes
7 13 Your boiler is having trouble communicating with one of the temperature sensors for your heating system, which may cause your heating or hot water to work inconsistently or stop altogether.
Your boiler is having trouble communicating with one of the temperature sensors for your heating system, which may cause your heating or hot water to work inconsistently or stop altogether.
Parts commonly replaced
- NTC Temperature Sensor
- Wiring harness
Related codes
7 22
Zone 2 overheating
7 23 Your boiler has detected that the water temperature in one specific heating area of your home has risen higher than it should be.
Your boiler has detected that the water temperature in one specific heating area of your home has risen higher than it should be.
Parts commonly replaced
- NTC Temperature Sensor
- Zone Valve
- Main PCB
Related codes
7 50
All Heating Zones locked
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