Hi everyone - I really hope someone will have an answer to this question as I am at my wits end!
We have a Worcester Bosch Highflow 400 RSF boiler and last week it stopped supplying hot water. We only have the hot water on at the moment and the heating and radiators are switched to off.
My father in law is an ex heating engineer so he stripped it down, cleaned everything including the inside of the heat exchanger and gave the boiler a service - still no luck. He then put a new fan assembly in as it seemed to be running slow but it still wouldn't supply more than a few seconds of hot water. He then replaced the safety temperature limiter, a new pressure release valve and a new auto air vent. We fired the boiler up and wunderbar - it all seemed great! We had hot water all afternoon, evening and all the next day. Then the next morning we were back to square one - a few seconds of hottish water then cold. Any ideas??? My father in law has many years of experience but even he is flumuxed. Here's hoping you have the answer...
We have a Worcester Bosch Highflow 400 RSF boiler and last week it stopped supplying hot water. We only have the hot water on at the moment and the heating and radiators are switched to off.
My father in law is an ex heating engineer so he stripped it down, cleaned everything including the inside of the heat exchanger and gave the boiler a service - still no luck. He then put a new fan assembly in as it seemed to be running slow but it still wouldn't supply more than a few seconds of hot water. He then replaced the safety temperature limiter, a new pressure release valve and a new auto air vent. We fired the boiler up and wunderbar - it all seemed great! We had hot water all afternoon, evening and all the next day. Then the next morning we were back to square one - a few seconds of hottish water then cold. Any ideas??? My father in law has many years of experience but even he is flumuxed. Here's hoping you have the answer...