Any ideas what it could possibly be? I was ready to have fork out for a new boiler as can't leave tenants with no heating should it stop working completely
Can some1 help? my vokera boiler in my rental property is starting up and heating radiators but goes to red within 5 mins - 1 hour, pressure is going down too I have to top up every so often, water never gets hotter than Luke warm. I need a second opinion as plumber says the boiler needs...