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How To Repair Your Potterton Suprima Boiler.

Steve has been producing How To tutorials and articles for over 10 years, as well as E-books with Amazon KDP.


Potterton Suprima 50.

This article relates mainly to the Potterton Suprima 50 heating boiler and how to diagnose faults with the system. It has to be said that working on gas boilers or any gas appliance is dangerous and should be left to a suitably qualified gas engineer. However, the information I will provide you in this article does not require you to work on gas pipes or burner parts.

Always turn off gas and electricity supplies by using any isolator switches before removing any covers or panels to your Potterton Suprima 50. No liability is accepted for damage, injury or loss as a result of any information provided in this article.

Suprima 50 overview.

Developed in the late 1990s the Potterton range of boilers were made specifically for the new build housing market and many builders chose to use the Potterton range due to their value for money and particularly compact size.

A neat little boiler the Suprima 50 had few faults when new and always worked efficiently. A particular fault often proved to occur after a number of years of use as the printed circuit boards would dry out and the joints of solder within the board would get so dry that electrical faults would occur often causing the boiler to lock out intermittently. Very often the problem would go away for a while then return.

Other than the dry circuit board these boilers were and some still are going strong. I have one still going strong after 14 years of continuous use. The only thing which has needed to be repaired is the circuit board and leads. This was an easy DIY repair and was done for the cost of the reconditioned board which was around £50. Much much cheaper than a new boiler.


Fault diagnosis.

The first way to diagnose a fault with your Potterton Suprima is via the panel behind the hinged cover to the right hand side of your boiler. The first time you get a Lock out on your boiler, meaning that the boiler shuts down resulting in you having no instant hot water and cold central heating radiators.

If you check behind the cover of your boiler there is a small panel at the top with a red light and a green one. A steady green light and your boiler is working normally. Flashing red light means that it is locked out and will need to be reignited by pressing the reset button. This usually fires the boiler back up and should then run normally. When your circuit board is suspect you find that you get lock outs intermittently at first then it happens more often and eventually will not fire the boiler.

Changing the circuit board for a reconditioned unit will be the only thing that will rectify the problem unless you are an expert in electronics and can resolder the minute cracks of solder within the board.

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Circuit boards are readily available on the internet and are normally sold on an exchange basis as they are no longer manufactured by Potterton and are obsolete in that sense.

Boilermate II Repairs.

Boilermate II

If you have a Potterton boiler the likelihood is that you will have a Boilermate storage tank attached to the heating system. After a lot of years of service this too can develop one or two running problems. If this is proving to be the case check out my article by clicking the link above.


If this article has been helpful why not have a look at some of Steve's other articles. Concentrating mainly on home appliance and auto repair tutorials these days Steve's mission is to help people save money in labour charges by doing jobs yourself where it is possible. There are times though, when a fully qualified technician will be needed.

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

© 2012 Steve Mitchell


Steve Mitchell (author) from Cambridgeshire on September 29, 2012:

TToombs08 thanks for being the first to comment. I didn't expect any comments from HP members as it is aimed at purely search engine traffic, so I am really pleased you found it of some interest.

Terrye Toombs from Somewhere between Heaven and Hell without a road map. on September 29, 2012:

A very thorough and well put together guide, posh! Voted up and shared on Chime.

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