I have been loosing a little pressure from the Eco tech plus 837 (12 y/o) combi. Say 0.3 bar over a week. Ive been topping it up over a 2 months.
Checked the expansion vessel the other day. Drained down the pressure in the boiler, but it wouldn't drain below 0.9 bar. Pumped up the EV to just under 1 bar using my bike pump with a pressure gauge on it. Opened the valves and filled back up. All ok and running at 1.5 bar.
That was on sunday. So heating working sunday and monday all ok.
This morning the heating didnt go off. F75 fault.
I switch off the boiler and put a tiny bit of water in, then switched on. All started working fine and is running now.
I have googled some issues and i wonder if the issue is the pressure sensor.
Or have i done anything wrong when putting air into the EV ?
Checked the expansion vessel the other day. Drained down the pressure in the boiler, but it wouldn't drain below 0.9 bar. Pumped up the EV to just under 1 bar using my bike pump with a pressure gauge on it. Opened the valves and filled back up. All ok and running at 1.5 bar.
That was on sunday. So heating working sunday and monday all ok.
This morning the heating didnt go off. F75 fault.
I switch off the boiler and put a tiny bit of water in, then switched on. All started working fine and is running now.
I have googled some issues and i wonder if the issue is the pressure sensor.
Or have i done anything wrong when putting air into the EV ?