how to change pressure relief valve heatline vizo 24?
f4 ironsation fault on boiler ?
my actuator on heatline c28 is wet?
heatline s20/s30 boiler?
pressure gauge has fall below 1 bar?
What can I do when my Heatline C24 boiler continuously cuts out?
Heatline boiler showing f5 fault?
heatline c28?
hot water going hot and cold, burner coming on and going off?