Hi,
Our CH is has been causing some problems for a while now and I don't seem to be able to get to the bottom of it. There are two problems that may be related:-
Prob 1
We have a Baxi Solo 3 conventional boiler (less than 1 year old) that occasionally goes into overheat and shuts down until reset. This will happen 2 to 3 times a week now the cold weather is here. In the summer it was about once every two weeks.
Prob 2
There is a deep thrumming noise coming from the CH pump - loud enough to wake the family in the morning. This sound appears no matter what the speed of the pump is set to.
All radiators get hot with no cold patches. We have had a plumber/heat eng look at the system and he said air was getting in since the heating overflow pipe was not in the expansion tank. He extended the end of the pipe so it reached below the water level in the expanion tank to stop air being sucked into the system.
I have tried to bleed all radiators and just get water out. When the CH shuts down I cannot hear water bubbles or gurgling as air settles. However, when the boiler stops and the pump continues in overrun the thrumming sound continues.
Could this be air in the system (if so how can I get rid of it) or a pump whose bearings are going - or something else entirely?
Thanks in advance
Mark
Our CH is has been causing some problems for a while now and I don't seem to be able to get to the bottom of it. There are two problems that may be related:-
Prob 1
We have a Baxi Solo 3 conventional boiler (less than 1 year old) that occasionally goes into overheat and shuts down until reset. This will happen 2 to 3 times a week now the cold weather is here. In the summer it was about once every two weeks.
Prob 2
There is a deep thrumming noise coming from the CH pump - loud enough to wake the family in the morning. This sound appears no matter what the speed of the pump is set to.
All radiators get hot with no cold patches. We have had a plumber/heat eng look at the system and he said air was getting in since the heating overflow pipe was not in the expansion tank. He extended the end of the pipe so it reached below the water level in the expanion tank to stop air being sucked into the system.
I have tried to bleed all radiators and just get water out. When the CH shuts down I cannot hear water bubbles or gurgling as air settles. However, when the boiler stops and the pump continues in overrun the thrumming sound continues.
Could this be air in the system (if so how can I get rid of it) or a pump whose bearings are going - or something else entirely?
Thanks in advance
Mark