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dbee
well that I don't know, but there is an empty box in the airing cupboard, I gather that is what a new thermostat would have come in, usually when I change something old for new like that I would put the old one in the box to make sure all is left tidy, but the box was left along with a fuse, it is quite a long box with "must be fitted vertically" on it, so by looking, I would imagine it is the thermostat on the top that they say they have changed, wouldn't they have had to drain the tank to take one out of the bottom of the tank?