ATAG boilers are known for their efficiency and high engineering standards. However, like any mechanical system, they can occasionally encounter problems. In this article, we will cover the most common ATAG boiler error codes, their meanings, and practical solutions. Whether you’re a homeowner or a technician, this guide will help you understand these errors and decide whether you need professional intervention.
Who Are ATAG Boilers?
A Legacy of Excellence
ATAG has been in the boiler industry for over 70 years, producing high-quality, energy-efficient boilers. Their reputation is built on delivering products that consistently outperform industry standards. Operating in multiple countries worldwide, ATAG boasts some of the most energy-efficient boilers in Europe. They also pride themselves on producing boilers with low NOx emissions, making them environmentally friendly options for both residential and commercial properties.
Read more: Common Sime Boiler Error Codes
Ferroli Boiler Error Codes / Fault codes List
Key Features of ATAG Boilers
- There are 4 different boiler models
- Quiet operation
- It is both Reliable and efficient
- It has a compact design
- It has a standard 10-year warrant, which can be extended to 14
- User friendly
Benefits of Installing an ATAG Boiler
When you choose to install an ATAG boiler, you’re investing in quality, efficiency, and reliability. Here are some of the key benefits:
1. Variety of Models
ATAG offers four distinct boiler models, each designed to meet different heating requirements, ensuring flexibility for various property types.
2. Quiet Operation
These boilers are known for their silent operation, making them ideal for residential settings where noise may be a concern.
3. Compact Design
Their compact design allows for easy installation, even in homes with limited space.
4. Reliability and Efficiency
ATAG boilers are built to last, with robust components that provide both reliability and high efficiency.
5. Extended Warranty
ATAG boilers come with a standard 10-year warranty, which can be extended up to 14 years, offering peace of mind to homeowners.
6. User-Friendly Interface
The user-friendly controls make it easy for homeowners to operate the boiler without needing technical expertise.
However, it’s important to remember that sometimes it may be more cost-effective to replace an old boiler rather than constantly repairing it. Older boilers tend to lose efficiency over time, leading to higher energy bills. Investing in a new, more efficient boiler can save you money in the long term.
ATAG Boiler Error Codes and Troubleshooting
Boiler error codes are essential indicators that something is wrong with the system. Below, we list the most common ATAG boiler error codes, their meanings, and how to address them.
![](https://letsheat.co.uk/wp-content/uploads/2022/10/Worcester-Bosch-Boiler-Faulty-thermistor-1024x504.webp)
Common ATAG Boiler Error Codes
Fault Code | Issue |
---|---|
10 | Outside sensor error |
20 | Flow sensor error |
40 | Return sensor error |
61 | Bus communication error |
78 | Water pressure out of range |
105 | Venting program active (runs for 7 minutes after power interruption) |
110 | Safety temperature exceeded |
111 | Maximum pressure exceeded |
119 | X2 link missing positions 4 and 5 |
129 | Fan not starting |
133 | No flame after 5 ignition attempts |
151 | Fan error or defective control unit |
154 | Return temperature higher than flow (flow increases too quickly) |
101 | Overheat error |
102 | Pressure sensor fault |
104 | Flow check failed |
108 | Pressure too low, needs filling |
1P4 | Pressure below 0.5 – 0.8 bar |
109 | Pressure greater than Pmax |
110 | Send probe damaged |
112 | Return probe damaged |
114 | Outdoor sensor error |
141 | Central heating flow switch open |
201 | Domestic hot water (DHW) probe damaged |
203 | Tank probe damaged |
303 | Printed Circuit Board (PCB) error |
304 | Too many resets |
501 | No flame detected |
612 | Fan fault (fan not starting) |
Read about: Intergas Boiler Error Codes / Fault
ATAG Boiler Error Codes / Fault Codes
Troubleshooting Common Faults
1. Pressure-Related Errors (Codes 108, 1P4, 109)
- Cause: Most of these issues arise when the boiler’s water pressure is too low or too high.
- Solution: Check the pressure gauge on the boiler. For low pressure (below 1 bar), refill the system via the filling loop. If the pressure is too high, bleed the radiators to reduce pressure.
2. Flame Detection Issues (Code 133, 501)
- Cause: These errors indicate that the boiler is having trouble igniting.
- Solution: Check that the gas supply is active and the ignition electrodes are clean. If the problem persists, the gas valve may need adjustment or replacement.
3. Sensor Errors (Codes 10, 20, 40, 112)
- Cause: Sensors are crucial for measuring various parameters like temperature and pressure. When a sensor is faulty, the boiler may not function correctly.
- Solution: A Gas Safe engineer should inspect and replace any damaged sensors.
iC and iS Combi Boiler Error Codes
These specific models of ATAG boilers also have unique error codes:
Fault Code | System Behavior |
---|---|
50 | DHW sensor error |
117 | Pressure greater than 3 bar or pump pressure increase too high |
118 | Pressure less than 1 bar or no pump detection |
For these combi boilers, regular maintenance is crucial to prevent pressure and sensor-related issues.
Other Fault Codes and Their Meanings
Sometimes, you may notice a spanner symbol on your boiler’s display. This can indicate two things:
- The boiler is in service mode.
- There is a blocking issue.
If the problem persists after a few reset attempts, it might result in the boiler locking itself. In this case, contact a qualified engineer to inspect and resolve the issue.
Read more: Combi boilers common faults
Glow-Worm Boiler Error Codes / Fault Codes
FAQs
Where are ATAG boilers manufactured?
ATAG boilers are engineered in Holland and use the highest quality stainless steel and brass components. Facts which explain why they are built to last. And why a 14 year warranty is possible with this brand of boilers.
How efficient are ATAG boilers?
The efficiency rating can show you how much of the fuel is converted into usable energy for the central heating or domestic hot water. Modern ATAG boilers have an ErP Efficiency rating of 94%, making them highly efficient.
How long is ATAG warranty?
All ATAG boilers come with a 10 year warranty as standard with a lifetime guarantee on the heat exchanger. This warranty can be extended to 14 years.
Why does my ATAG boiler keep losing pressure?
Possible causes can be broken diaphragms and airlocks, problems with the thermostat, low water levels or failure of motorised valves. It’s a good idea to check if an issue with boiler pressure or your thermostat is causing the issue.
What should water pressure be on ATAG boiler?
As with most boiler models, the ATAG boiler water pressure should be around 1.5 bar.