Table of Contents
Ariston is part of the Ariston Thermo Group. They have been in business for over 90 years. The brand was founded by an Italian industrial pioneer, Aristide Merloni. According to the company, they brand themselves as ‘global leaders in heating comfort and energy efficiency’. However, like any appliance and at some point or another, they can encounter some issues and experience breakdowns. On this blog, we will look at Ariston Boiler Error and Fault Codes.
Ariston has a wide range of combi, system and regular boilers. Their combi range has a power output of 24 – 38kW, which will be suitable for a small flat or a large house, depending on the power output you choose. As for their system boilers, they have a power output of 18 – 30kW. And finally, their regular boilers come in 24kW.
The error codes that we provide on this blog would help you identify what problems you are facing with your Ariston boiler. This can make it easier for you to fix if it is possible. However, if the problem is internal, then calling a Gas Safe Engineer is highly recommended.
What are boiler fault codes?
Boiler fault codes are alphanumeric or numeric indicators displayed by a boiler’s control panel to communicate specific issues or malfunctions within the heating system. These codes help both homeowners and service technicians identify and diagnose problems quickly, facilitating efficient troubleshooting and repairs. Each code corresponds to a particular fault or condition, allowing users to understand the nature of the issue without needing to open the boiler or delve into complex technical details.
Read about: Combi boilers common faults
Potterton Boiler Error Codes / Fault Codes
Ariston Boiler Error and Fault Codes
Error Code | Model | Possible Cause |
Central Heating Circuit Issues | ||
101 | All Boilers | Overheat |
102 | E-Combi Evo E-System Evo Clas He Evo (Combi and system) | Pressure sensor error |
103 | All Boilers | Insufficient circulation |
104 | All Boilers | Insufficient circulation |
105 | All Boilers | Insufficient circulation |
106 | All Boilers | Insufficient circulation |
107 | All Boilers | Insufficient circulation |
108 | All Combi Boilers | Insufficient water (request filling) |
109 | Clas net one / Clas one Combi Clas system one | System pressure greater than 3 bar |
110 | All Boilers | Central heating Flow temperature probe circuit open/short circuit |
112 | All Boilers | Central heating Flow temperature probe circuit open/short circuit |
114 | All Boilers | External sensor circuit open/short circuit |
116 | All Combi and System Boilers | Floor thermostat contact open |
118 | All Boilers | Heating delivery probe problem |
1p1 | All Boilers | Insufficient circulation indication |
1p2 | All Boilers | Insufficient circulation indication |
1p3 | All Boilers | Insufficient circulation indication |
1p4 | Clas Net one Combi Clas one Combi Clas System one | Insufficient circulation indication |
Error Code | Model | Possible Cause |
Hot Water Circuit Issues | ||
202 | Clas HE evo Clas he evo system E-combi evo E-system evo | 2 bottom storage temperature probe open/short circuit |
204 | Clas HE evo Clas he evo system E-combi evo E-system evo | Solar collector temperature probe open/short circuit |
205 | E-combi one E-System one Clas Net one Combi Clas one Combi | Domestic hot water in probe open circuit |
207 | Clas HE evo Clas he evo system E-combi evo E-system evo | Solar collector overheating |
208 | Clas HE evo Clas he evo system E-combi evo E-system evo | Collector frost protection temperature |
Error Code | Model | Possible Cause |
Internal Printed Circuit Board (PCB) Issues | ||
301 | All Boilers | EEPROM error |
302 | All Boilers | Communication error |
303 | All Boilers | Main printed circuit board (PCB) error |
304 | All Boilers | Too many resets (> 5) in 15 minutes |
305 | All Boilers | Main printed circuit board (PCB) error |
306 | All Boilers | Main printed circuit board (PCB) error |
307 | All Boilers | Main printed circuit board (PCB) error |
3p9 | E-combi one E-System one Clas Net one Combi Clas one Combi Clas System one | Schedule service |
External Printed Circuit Board (PCB) Issues | ||
407 | Clas HE evo Clas he evo system E-combi evo E-system evo | 7 Room sensor circuit open/short circuit |
Error Code | Model | Possible Cause |
Ignition & Detection Issues | ||
501 | All Boilers | No flame detected |
502 | All Boilers | Flame detected with gas valve closed |
504 | All Boilers | Flame lift |
5p1 | All Boilers | 1st ignition failed |
5p3 | All Boilers | 2nd ignition failed |
5p4 | All Boilers | Flame cut-off |
Error Code | Model | Possible Cause |
Air Inlet / Flue / Gas Outlet Issues | ||
604 | CLAS HE R E-Combi Evo E-System EVO Clas HE evo Combi Clas HE evo System | Insufficient fan speed |
610 | All Boilers | Thermofuse open |
612 | Clas HE Evo Combi Clas He Evo System E-Combi Evo E-system Evo Clas net one combi Clas one combi Clas system one | Fan speed has incorrect measurement |
Error Code | Model | Possible Cause |
Multi-Zone Heating Issues | ||
701 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 2 outgoing sensor defective |
702 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 2 return sensor defective |
703 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 3 outgoing sensor defective |
704 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 3 return sensor defective |
705 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Hydraulic separation sensor defective |
706 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 2 overheating |
707 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 3 overheating |
However, in some cases, getting a new boiler might be more cost-effective than getting your old boiler fixed. Some issues might be costly to fix. What is more, a new boiler will probably be more efficient and can help you save both money and energy. That is why getting a new boiler is a good investment in the long run.
Get a quote from Let’s Heat. We have a large range of products and our staff of Gas Safe engineers provides an excellent service that is both professional and reliable. In addition, we can help you get the boiler that best fits your house and heat requirements.
Read more:
Intergas Boiler Error Codes / Fault Codes 2023
Biasi Boiler Error Codes / Fault Codes
Zanussi Boiler Error Codes & Fault Codes
Why choose smartadapt?
We’re Punctual
We always aim for simplicity and quality of work. Using the latest and the beat management system to schedule jobs and confirm appointments, send reminders and issue certificates and send bills. We offer next-day installations and emergency services as well. We’re very quick to respond to your call and will be at your doorstep in no time.
We Care
Establishing a good relationship with our customers is our priority. We always take the time to understand what your heating requirements are. We do our best so as not to create any sort of disruption to your home or make so much noise.
Experienced Staff
Our experience in the heating business has paved the way for us to expand further and provide our services nationwide. We’re very committed to our work. Our engineers are helpful and informative. They are highly skilled and have a wide knowledge of their trade. Our services include: boiler installation, maintenance, repair and boiler service plan. We work with all types of boilers: heat only boilers, system boilers and combi boilers. We install heat pumps and central heating systems. And we also provide plumbing services and much more.
Read more about: Navien Boiler Error Codes / Fault Codes
Alpha Boiler Fault Codes / Error Codes List
FAQs
Why is my Ariston boiler heating not working?
There are various reasons why your Ariston boiler might fail to ignite. These can include:
faulty ignition leads
blocked burner
broken diaphragms or airlocks
problem with the spark generator
low gas pressure
no or little gas supply
debris in the pilot jet
How to fix ignition failure on an Ariston boiler
Before contacting a heating engineer, you first can check the boiler pressure to see whether it isn’t too low or too high. Otherwise, having a Gas Safe engineer take a loot at it is the best course of action.
How to fix an Ariston faulty fan?
First of all, you should never attempt to fix the issue yourself. This is a problem that requires the expertise of a Gas Safe engineer. The heating engineer would first check that the fan is getting the needed power, by looking at the voltmeter. If it is, then it’s very likely that a replacement fan will need to be fitted.
Read more about:
Vokèra Boiler Fault Codes / Error Codes List