Baxi 105e "Power Cycling" Loop - PCB or Air Pressure Switch?

Joined
29 Aug 2020
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Hi everyone,
I just got back from shopping to find my trusty old Baxi 105e stuck in a strange loop. The power light was flickering on for about a second, then cutting out, and repeating—almost like it was constantly trying to reboot. Interestingly, neither the fan nor the pump was kicking in during this cycle.
I performed a manual reset and, luckily, it’s been back to normal and working perfectly for about 6 hours now.
I’ve already had a quick chat with my gas engineer, and he suggested it could be either a failing PCB or a glitchy Air Pressure Switch (APS).
Has anyone else experienced this specific "power-on-off" loop with a 105e? I’m trying to figure out if this is a "one-off" gremlin or the start of a total part failure.
Thanks in advance for any insights!
 

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