Potterton Suprima - controller fault?

17 Mar 2020
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United Kingdom
Hi folks, not my boiler but by proxy I can hear it through the wall!

Every few mins I hear the boiler try to start up about 5 times, this can last between a few seconds or usually about 20-30 seconds. This starts about 10pm usually when the heating goes off and lasts all night. Does this sound like a controller issue, not the usual pcb? Wondering whether an EP2 would cure it. The neighbour has mention the zone valve up near the tank doesnt work either.

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