Hi, I've tried to increase pressure, followed all the instructions, but the pressure does not move and remains flat at zero. Is there anything at all that I've missed.
hi i have regular conventional boiler Halstead hero 40 fitted 3 years ago it began to turn off on its own about 4 weeks ago, so as the 6 radiators are old i put in salamandar sludge remover 3 weeks ago, in this time the boiler has been going off from time to time, but yesterday it completely gave up...
