Hello all.
We have a Glowworm Flexicom 30sx.
Once a year/18 months, it bails out on an F9 error (it is serviced).
We traced this to be the CH pressure sensor.
18 months on.... it went again. We have appalling water here, and our softener hasn't helped (maybe made it worse?).
Anyway, I had bought a spare, so I isolated the boiler and swapped it out.
Bled all the rads and it fired up fine. But...
The airing cupboard gauge shows 1.5 bar, and the boiler shows 2.1.
Wrong sensor? Just checked DHWspares online where is came from and it seems correct.
But, it was all working. However... just glanced at the boiler and it said 0.3bar.
Switched it off and on again and 2.1 bar came back. Fires up fine.
Any ideas?