Hi.
I am new to here and am gas safe registered.
I am having a problem with the above boiler on an unvented system.
Boiler fires up and runs on hot water ok.
When central heating is running ( not for long ) there is a sloshing noise where water is entering the heat exchanger, the flow sensor drops out and boiler and pump stop then there is a backfill of water and air bubbles back up the return pipe.
I have bled the system and vented it as much as possible.
The flow sensor is doing what it should.
Pump is working ok. Pressure it at 1.5 bar.
Can anyone help please.
P.S
The boiler has worked fine for the past few years.
I am new to here and am gas safe registered.
I am having a problem with the above boiler on an unvented system.
Boiler fires up and runs on hot water ok.
When central heating is running ( not for long ) there is a sloshing noise where water is entering the heat exchanger, the flow sensor drops out and boiler and pump stop then there is a backfill of water and air bubbles back up the return pipe.
I have bled the system and vented it as much as possible.
The flow sensor is doing what it should.
Pump is working ok. Pressure it at 1.5 bar.
Can anyone help please.
P.S
The boiler has worked fine for the past few years.