I have a fault with my Vaillant boiler and am supposed to give the engineer a serial number so that they know how old it is. I cannot find one on this model. Does anyone now where to find it?
Thank you!
I have a fault with my Vaillant boiler and am supposed to give the engineer a serial number so that they know how old it is. I cannot find one on this model. Does anyone now where to find it?
Thank you!
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