Thank you for your reply. Just tried that and water sprayed from the tap as I was turning it. The pressure went up slightly then went down again. The flame failure light is now showing red with the power on light showing green. The water is still not running hot.
I have just moved into a flat and have found that the hot water is not working. My landlord has suggested that it may be due to low pressure in the boiler and that I should try to increase it. If anyone could give steps and let me know which taps I need to open that would be great. I have...