my hot water has stopped working. i went to check the boiler to see if it was on and notice there was no flame on when the water was running and steam was coming out of the auto air vent. i then stopped the tap let the boiler cool down for a while and turned the tap on again. on checking the boiler it lights up for about 5-10 seconds and then shuts off. soon after this steam starts coming out of the air vent again.
could it be that the pump has stopped working so the water is not being pumped around the water to water heat exchanger.
i have just had the diaphragm changed on the divertor valve. but it worked after this was done.