Hope you can help. We recently had our central heating flushed out and the plumber put in a new pump and valve and also had to make a low level drainage point cos there wasn't one.
The heated towel rail in the bathroom has ALWAYS been on but since we have had this work done it works fine when the water heating is on but when we put the central heating on it goes off completely and will not come on again until we drain it off again.
Please can anyone advise what the problem could be?