My mother has an oldish system (but a modern boiler) with pumped CH and gravity DHW.
The DHW has stopped circulating through the boiler is running OK and the CH works.
There is a Cyltrol thermostatic valve under the cylinder. The cylinder is on the floor above the boiler, but about 5 metres along the landing with near-horizontal pipes. the pipework is 22mm. The pipes to the cylinder are not hot.
I have told her to turn on the immersion heater for the moment.
The circulating water is blackish and there is gas in the radiator in the spare room above the boiler, so I will probably give it a chemical clean and refill with inhibitor, aside from the current problem. I realise that this will not clean the non-circulating parts.
I have said I will have a look at it before calling in someone who knows better.
If I look for a sediment blockage or a jammed Cyltrol, is that reasonable?
I can bung the F&E if I have to take the Cyltrol off (I don't know if there is any free movement in the return pipe).
Any other suggestions?
The DHW has stopped circulating through the boiler is running OK and the CH works.
There is a Cyltrol thermostatic valve under the cylinder. The cylinder is on the floor above the boiler, but about 5 metres along the landing with near-horizontal pipes. the pipework is 22mm. The pipes to the cylinder are not hot.
I have told her to turn on the immersion heater for the moment.
The circulating water is blackish and there is gas in the radiator in the spare room above the boiler, so I will probably give it a chemical clean and refill with inhibitor, aside from the current problem. I realise that this will not clean the non-circulating parts.
I have said I will have a look at it before calling in someone who knows better.
If I look for a sediment blockage or a jammed Cyltrol, is that reasonable?
I can bung the F&E if I have to take the Cyltrol off (I don't know if there is any free movement in the return pipe).
Any other suggestions?