List Of Ariston Boiler Error Codes and Problems: A Complete Guide
Ariston boilers utilise sophisticated technology and software to ensure your home’s consistent and reliable heating. However, like any electronic device, they can encounter issues requiring troubleshooting.
Ariston boilers come equipped with an array of error and fault codes that provide detailed information about the nature of their malfunctions. Pay close attention to these codes to accurately diagnose the problem before taking corrective action, whether calling a professional for repair or attempting a DIY fix. Understanding these error and fault codes is crucial, as they prevent further damage from occurring while increasing safety and efficiency levels.
This article will list all the Ariston boiler error codes and discuss the top 7 Ariston boiler problems and their solutions.
Before we move any further, let’s see a quick overview of the Ariston boilers:
Ariston Boiler Overview
Ariston is a leading manufacturer of advanced, high-performance boilers that provide reliable and efficient heating solutions for residential and commercial spaces. They offer an extensive range of products, including combi boilers, system boilers, and conventional models with various features to suit different needs. The company uses the latest technology and innovations in the industry to deliver high-quality boilers that are easy to install, use, and maintain.
Ariston boilers are also energy-efficient and environmentally friendly, reducing carbon emissions and helping homeowners save on energy bills in the long run. With more than 50 years of experience in this field, Ariston has established itself as a trusted brand that provides excellent customer service, expert technical support, and competitive product pricing.
List of All Ariston Boiler Error Codes
1. Central Heating Circuit Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 101 | All Boilers | Overheat |
Ariston boiler error 102 | E-Combi Evo E-System Evo Clas He Evo (Combi and system) | Pressure sensor error |
Ariston boiler error 103 | All Boilers | Insufficient circulation |
Ariston boiler error 104 | All Boilers | Insufficient circulation |
Ariston boiler error 105 | All Boilers | Insufficient circulation |
Ariston boiler error 106 | All Boilers | Insufficient circulation |
Ariston boiler error 107 | All Boilers | Insufficient circulation |
Ariston boiler error 108 | All Combi Boilers | Insufficient water (request filling) |
Ariston boiler error 109 | Clas net one / Clas one Combi Clas system one | System pressure greater than 3 bar |
Ariston boiler error 110 | All Boilers | Central heating Flow temperature probe circuit open/short circuit |
Ariston boiler error 112 | All Boilers | Central heating Flow temperature probe circuit open/short circuit |
Ariston boiler error 114 | All Boilers | External sensor circuit open/short circuit |
Ariston boiler error 116 | All Combi and System Boilers | Floor thermostat contact open |
Ariston boiler error 118 | All Boilers | Heating delivery probe problem |
Ariston boiler error 1p1 | All Boilers | Insufficient circulation indication |
Ariston boiler error 1p2 | All Boilers | Insufficient circulation indication |
Ariston boiler error 1p3 | All Boilers | Insufficient circulation indication |
Ariston boiler error 1p4 | Clas Net one Combi Clas one Combi Clas System one | Insufficient circulation indication |
2. Hot Water Circuit Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 202 | Clas HE evo Clas he evo system E-combi evo E-system evo | 2 bottom storage temperature probe open/short circuit |
Ariston boiler error 204 | Clas HE evo Clas he evo system E-combi evo E-system evo | Solar collector temperature probe open/short circuit |
Ariston boiler error 205 | E-combi one E-System one Clas Net one Combi Clas one Combi | Domestic hot water in probe open circuit |
Ariston boiler error 207 | Clas HE evo Clas he evo system E-combi evo E-system evo | Solar collector overheating |
Ariston boiler error 208 | Clas HE evo Clas he evo system E-combi evo E-system evo | Collector frost protection temperature |
3. Internal Printed Circuit Board (PCB) Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 301 | All Boilers | EEPROM error |
Ariston boiler error 302 | All Boilers | Communication error |
Ariston boiler error 303 | All Boilers | Main printed circuit board (PCB) error |
Ariston boiler error 304 | All Boilers | Too many resets (> 5) in 15 minutes |
Ariston boiler error 305 | All Boilers | Main printed circuit board (PCB) error |
Ariston boiler error 306 | All Boilers | Main printed circuit board (PCB) error |
Ariston boiler error 307 | All Boilers | Main printed circuit board (PCB) error |
Ariston boiler error 3p9 | E-combi one E-System one Clas Net one Combi Clas one Combi Clas System one | Schedule service |
4. External Printed Circuit Board (PCB) Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 407 | Clas HE evo Clas he evo system E-combi evo E-system evo | Room sensor circuit open/short circuit |
5. Ignition & Detection Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston Error 501 | All Boilers | No flame detected |
Ariston Error 502 | All Boilers | Flame detected with gas valve closed |
Ariston Error 504 | All Boilers | Flame lift |
Ariston Error Sp1 or 5p1 | All Boilers | 1st ignition failed |
Ariston Error 5p3 | All Boilers | 2nd ignition failed |
Ariston boiler error 5p4 | All Boilers | Flame cut-off |
6. Air Inlet / Flue / Gas Outlet Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 604 | CLAS HE R E-Combi Evo E-System EVO Clas HE evo Combi Clas HE evo System | Insufficient fan speed |
Ariston boiler error 610 | All Boilers | Thermofuse open |
Ariston boiler error 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 |
7. Multi-Zone Heating Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 701 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 2 outgoing sensor defective |
Ariston boiler error 702 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 2 return sensor defective |
Ariston boiler error 703 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 3 outgoing sensor defective |
Ariston boiler error 704 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 3 return sensor defective |
Ariston boiler error 705 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Hydraulic separation sensor defective |
Ariston boiler error 706 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 2 overheating |
Ariston boiler error 707 | E-Combi Evo E-System EVO Clas HE evo combi Clas he evo system | Zone 3 overheating |
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Ariston System Boiler Errors and Fault Codes: Clas Net One, Clas One, E-Combi, and E-System Boilers
1. External Printed Circuit Board (PCB) Issues
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 411 | Clas Net one Clas one E System | Room sensor circuit open or short circuit zone 1 |
Ariston boiler error 412 | Clas Net one Clas one E System | Room sensor circuit open or short circuit zone 2 |
Ariston boiler error 414 | Clas Net one Clas one E System | Room sensor circuit open or short circuit zone 3 |
2. Multi-Zone Heating
Fault Code | Boiler Model | Possible Cause |
---|---|---|
Ariston boiler error 701 | Clas Net one Clas one E System | Send sensor defective (Zone 1) |
Ariston boiler error 702 | Clas Net one Clas one E System | Send sensor defective (Zone 2) |
Ariston boiler error 703 | Clas Net one Clas one E System | Send sensor defective (Zone 3) |
Ariston boiler error 711 | Clas Net one Clas one E System | Return sensor defective (Zone 1) |
Ariston boiler error 712 | Clas Net one Clas one E System | Return sensor defective (Zone 2) |
Ariston boiler error 713 | Clas Net one Clas one E System | Return sensor defective (Zone 3) |
Ariston boiler error 722 | Clas Net one Clas one E System | Overheating in zone 2 |
Ariston boiler error 723 | Clas Net one Clas one E System | Overheating in zone 3 |
Ariston boiler error 750 | Clas Net one Clas one E System | All heating zones locked |
Ariston Boiler Top 7 Error Codes
Above, we have mentioned the list of various Ariston boiler codes so that you know the reason behind the fault. But now we will discuss the top 7 error codes that homeowners commonly face.
1. Ariston Boiler Error Code 108: Low Water Pressure
One of the most common problems faced with the Ariston boiler is low water pressure, which displays error code 108 on your boiler. Low water pressure is generally the result of leakage somewhere in your central heating system. However, this problem is not very critical but needs to be dealt with as quickly as possible. It is suggested that you contact a gas safety engineer and let him inspect the problem in detail. Meanwhile, you can take the following preventive measures, mentioned below:
Safety measures:
Try finding the leaky spot or checking for cold radiators. After that, check the pressure gauge rating between 1.5 bars. If all these boxes are checked, contact a Gas Safe engineer immediately, as he will deal with the leakage, bleed out your radiators, and top up your boiler’s water pressure.
In some cases, the problem is related to other factors; to learn about them, read our detailed blog: What to Do If Your Boiler Pressure Is Low.
2. Ariston Boiler Error Code (301–407): PCB Error
Another standard fault code that bothers UK homeowners is the PCB error fault code. As it sounds, this indicates faults with the PCB. These error codes can be caused for various reasons, including power surges, short circuits, or faulty components. This problem is critical, as the PCB is the central nervous system of your boiler. The error code that will be displayed is the following:
- 301
- 302
- 303
- 304
- 305
- 306
- 307
- 3p9
- 407
Safety measures:
As the PCB is your boiler’s internal component, you should never attempt to fix it yourself and contact a Gas Safe registered engineer. Let him inspect the problem, as sometimes the issue is related to the loose wire, which can be dealt with quickly, but sometimes a few components of the PCB get damaged, making you look for a boiler PCB replacement, which is a hefty expense.
Read more about: How to diagnose boiler PCB faults
3. Ariston Boiler Error Code A41: Fan not working correctly
Ariston boiler fault code A41 indicates a malfunction in the boiler’s fan. The most common cause of this issue is the buildup of dirt and debris on the fan, which prevents it from turning properly. Moreover, this code can also indicate a defective motor or wiring issue. This is a critical problem, as when the fault arises with the fan, your boiler will not be able to release harmful gases outside the flue.
Safety Measures:
To rectify this problem, an experienced technician should inspect the fan blades for any damage or wear and tear to determine whether to repair or replace the component. In addition, they may carry out a full diagnostic check on the entire system to ensure no underlying problems are contributing to the fault code A41 error message. It’s crucial to promptly address any alleged defects in your Ariston boiler’s essential components to avoid further malfunctions and increase its longevity—always seek consultation with a professional heating engineer before attempting any repairs yourself.
4. Ariston Boiler Error Code 501: No Pilot Light
The “No Pilot Light” fault code 501 on an Ariston boiler indicates that the pilot light has failed to ignite, preventing the boiler from providing heating or hot water. This can be caused by various issues, including a faulty thermocouple, a blocked flue or air intake, or a malfunctioning gas valve.
Safety Measure:
Professional troubleshooting will need to be carried out to determine the root cause of the issue and make the necessary repairs. Ensuring that only trained professionals work on gas boilers is essential, as they can be hazardous if not handled correctly. Regular maintenance and servicing of Ariston boilers can help prevent faults such as no pilot light, ensuring your system remains safe and efficient.
5. Ariston Boiler Error Code E43: Air Pressure Switch Fault
The Ariston boiler’s faulty pressure switch (fault code E43) is a common issue homeowners and heating engineers encounter. This fault typically occurs when the air pressure switch, which is responsible for detecting whether there is adequate combustion airflow, becomes stuck or fails to operate as intended. As a result, the boiler will shut down and display the E43 error code on the digital display panel.
Safety Measures:
Addressing this problem requires knowledge and skills, including understanding boiler components and wiring diagrams. In many cases, replacement of the air pressure switch may be necessary. Otherwise, cleaning dirt or debris from impacted areas can remedy minor faults, while ensuring that the device performs safely is fundamental to safeguarding against any compromised system operation.
6. Ariston Boiler Error Code 103-108: Insufficient Water Circulation
The Ariston boiler error codes are 103-108. Insufficient water circulation typically indicates a problem with the pump or limescale buildup in the system. This can cause reduced water flow through the boiler, leading to overheating and dangerous situations for your family. The codes that will be displayed on your screen indicating insufficient water circulation are the following:
- 103
- 104
- 105
- 106
- 107
These codes could be related to central heating pump problems, blockages in the central heating system, incorrect speed settings, or airlocks in the central heating pump.
Safety Measures:
To deal with insufficient circulation, contacting a gas-safety engineer is crucial. Let him inspect the system for signs of limescale accumulation and flush it out properly if needed. Regular maintenance from your side is crucial in preventing this error, as this issue arises due to a lack of attention during idle periods. Each homeowner must learn about their Ariston boiler, its needs for service, and periodic checks of its functionality to avoid such domestic hazards from happening or damaging their systems altogether.
7. Ariston Boiler Error Codes: SP1-SP3 or 5P1-5P3: Ignition Fault
The Ariston boiler error code 5P1–5P3 indicates an ignition fault in the heating system. This error message occurs when the boiler fails to ignite or sustain a flame long enough to heat the water. There could be several reasons behind this fault, which include faulty components such as the spark electrode, ignition lead, or control circuit board. The boiler’s gas valve may also malfunction, obstructing the flow of gas to the burner and causing ignition failure.
Safety Measures:
To rectify the ignition fault, it is recommended that a qualified heating engineer be called upon to diagnose and fix any underlying issues with the system’s components. Regular maintenance of your Ariston boiler can help prevent error codes from occurring and ensure optimal performance in future use.
Conclusion
This article provides a comprehensive list of Ariston boiler faults and error codes and a detailed discussion of the top seven error codes. We aim to help you identify any issues with your boiler and take the necessary steps to resolve them.
If, however, your boiler is beyond repair due to its age and you are looking for a boiler replacement, we are here to assist you in finding the perfect replacement that meets your specific requirements. Don’t hesitate to contact us for support.
Get a new boiler
today!
Get your new boiler and save your heating bill yearly with new energy efficient boiler.
The information provided in this article has been collected from various sources. However, we suggest you consult a certified Gas-Safe Engineer in your area before making any decisions, as every individual’s home situation is unique.