Identifying the Top Ariston Boiler Error Codes (and What to Do About Them)

This is our guide to Ariston boiler error codes, including what to do if you have them and what you should do next. Please do not hesitate to get in touch for more information how we can help with these issues in Edinburgh.

We’ve compiled a list of some of the most frequent Ariston boiler error codes.

Please keep in mind, before proceeding to the particular issue with your Ariston boiler, that any repairs must be performed by a Gas Safe registered expert.

For individuals who want to put their money into a new boiler that comes with an extended warranty, we suggest completing our online quote tool with us!

Errors on the printed circuit board (PCB) (Fault Code 301-307)

This is the potentially the most expensive repair
The printed circuit board (PCB) is one of the essential components on your Ariston.

This is the circuit board that communicates with all of the electronic components in your boiler, both sending and receiving signals.

Your boiler will not function properly if it is not there (or if it is damaged).

If your boiler displays one of the following trouble codes, it is likely that the PCB has failed:

The most common fault codes are 301, 302, 303, 304, 305, 306, and 307. The 303, 305, 306, and 307 error codes are the most problematic.

Because these are “main” PCB faults, there is a high possibility that the unit will need to be replaced.

What should i do?

Have a Gas Safe engineer come out and evaluate the situation. It is possible to fix faulty connections and wiring to the PCB in certain cases.

If a new PCB is required, the cost may be in the region of £500.

Assuming that the remainder of your boiler is in good working order, it makes much more sense to obtain a quotation on an entirely new and more energy-efficient boiler.

Insufficient Water Pressure (Fault Code 108)

Let’s move on to a common issue that we encounter with Ariston boilers on a regular basis: low water pressure.

The 108 error code is most likely to be shown on your boiler if you have a low water pressure problem.

Water pressure is reduced as a result of leaks. This may be accomplished via your boiler or other components of your heating system.

What should i do?

First and foremost, the leak must be identified and repaired.

Once the boiler leak has been repaired, the pressure must be brought up to at least 1.5 bar by utilising the external filling loop to ensure that the boiler is operational.

Failure of the air pressure switc (Ariston Boiler Error Codes E34)

Ariston boilers manufactured after 2000 have a different set of trouble codes than earlier models. A failure of the air pressure switch, for example, will result in an E34 code being shown on the Microgenus 2.

The air pressure switch guarantees that hazardous gases are forced out of the boiler, up the flue, and out of your home by the fan when it is turned on.

If there is a problem with the air pressure switch, the boiler is not safe to use at this time.

The PCB is unable to determine whether or not your boiler is venting flue gases, therefore it locks out just in case.

What should i do?

If you’re fortunate, the problem will be confined to the air pressure switch in this particular instance.

Ariston fault codes, on the other hand, are not always correct. It is possible that the issue is with the connection between the PCB and the air pressure switch, and that the PCB is the source of the problem.

When the PCB on an older boiler has to be changed, it makes far more sense to consider obtaining a quotation for a replacement.

Of course, you should first evaluate the cost of a repair to decide which option makes the most financial sense for you.

Insufficient Circulation  (Fault Code 103-108)

It is likely that your Ariston boiler is experiencing problems due to inadequate circulation if you have any of the following trouble codes:

103,104,105,106,107,108
Insufficient circulation in a Ariston boiler may be caused by two different factors:

Seized heating pump
The heating system is clogged with debris.
Air in central heating pump.

If the heating pump is not circulating properly, the radiators and hot water will not reach the desired temperatures.

The following problems may be at the root of the problem:

• The heating pump has airlocks in it.
• Bearings that have worn out, or a pump shaft that has broken
• Incorrect setup of the speed
• Blockages

Typically, sludge from the heating system causes blockages in the heating system. Corrosion and rust buildup in your pipes, radiators, and boiler are the cause of this.

It will not enable water to flow properly, which is why the 103-108 fault codes are shown on the boiler.

What should i do?

If you are experiencing this circulation issue consistently, then it is worth considering installation a magnetic filter and or having the system power flushed.

Please get in touch with us today for more advice on Ariston boiler error codes