Ongoing problem with pressure problems. Pressure keeps dropping to zero after heating as been on(got an engineer coming out on friday for this). However since yesterday after I re-pressurize the system to about 1 bar manually within about 30 secs the pressure goes to 3 bar, then I have to run...
I have a response 120 combi bolier. Problem has just started a couple of weeks ago. When the heating is switched on after a couple of minutes the pressure rises to 3 bar then after an hour or so settles down to 1 1/2 bar. When heating switches off the pressure will drop down to zero and I have...