Potterton Suprima 70 Lockout

23 Feb 2014
Reaction score
United Kingdom
Potterton Suprima 70 won't start. LED flashes RED rapidly (3 times per sec). Current PCB is 5111604 (its 3rd one in its lifetime).

1. Does the PCB give the reason for the lockout? I have no manual for this PCB & cannot find one online.

2. A few days prior to lockout the boiler was making a lot more noise than normal. I was not sure if it was the fan or some electrically induced hum.

3. How could I diagnose the fault? (I have a good range of standard DIY tools, incl electric meter, but nothing specialist for boilers).
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local