some one on here was refering to the gc numbers having a meaning is there a list/table some where to help decipher them?
also im told there is a code in vaillant boiler serial numbers relating to the date of manufacture can anyone explain this and does it apply to just vailants or all boilers?
also im told there is a code in vaillant boiler serial numbers relating to the date of manufacture can anyone explain this and does it apply to just vailants or all boilers?
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