Our boiler's about 27 years old and works fine usually but the pilot light's gone out twice in the last two days. We thought it was the extreme winds that we've had. My husband's managed to re-light it both times but when we came home today it was out again. I've rung the man who services it but he's going off for the weekend and he suggested pressing the re-set button which he said isn't actually a button but a green bit of plastic under the boiler.. We've searched for it but can't find it - can anyone guide me as to where it can be located. Thanks