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General Discussion Area / Another heating issue
« on: 05 April 2018, 08:13:19 »
Its the turn of my warm air central heating to need mending 
It was playing up bit time, investigation revealed this

full size below if you want better zoom
http://images.omegaowners.com/images/Jimbob/IMG_3655.JPG
Question is, is this repairable? Clearly some components (at least the central varistor, and 1 resistor) are unidentifiable as theyve melted....but why?
Am I ok to just replace these?
Ive bought a new PCB as it seemed the best option to quickly get the system running again, and to also identify the bad components, as this isnt a common unit theres not a lot of info out there on it. Ideally I'd like to repair this in case of 'next time'. clearly no urgency to this now though.
Can put other photos on if needed. Of old or new

It was playing up bit time, investigation revealed this
full size below if you want better zoom
http://images.omegaowners.com/images/Jimbob/IMG_3655.JPG
Question is, is this repairable? Clearly some components (at least the central varistor, and 1 resistor) are unidentifiable as theyve melted....but why?
Am I ok to just replace these?
Ive bought a new PCB as it seemed the best option to quickly get the system running again, and to also identify the bad components, as this isnt a common unit theres not a lot of info out there on it. Ideally I'd like to repair this in case of 'next time'. clearly no urgency to this now though.
Can put other photos on if needed. Of old or new