- Joined
- 4 Nov 2025
- Messages
- 4
- Reaction score
- 0
- Country
Hi all,
I have an ideal logic Combi max2 30kwh that was installed in my hose prior to buying it.
It’s a one zone system with TRVs and an Ideal Halo WiFi thermostat.
It feeds 11 radiators in total, they are all type 22 and replaced at time of boiler I think.
1600x500 X 2
1800 x 500
1200x500 x3
1000x500
700x500
500x500 x3
There is one bypass road which is a 500x500 and the rest have TRVs
The issue I’m having is radiators upstairs close to the boiler all hiss, no matter what is done. It’s less so with fully open trv.
I can live with that but what’s getting to me is, where upstairs meets downstairs in the wall there is pipes carrying the flow/return (Qualplex) and these have a tapping/ticking noise a lot of the time. I was wondering is this due to the boiler being oversized and when trvs close the pressure is too high. There’s no external ABV from what I can tell.
As a diagnostic measure I picked a larger radiator in the hallway 1600x500 and fully opened the trv and lockshield as a makeshift bypass but the issue stayed the same. Before doing this the boiler would run for a few minutes then the pump overrun would kick in fairly quickly. This 1600x500 blasting all the time has helped that a bit.
Also I have been getting lots of “pump fault” errors
Has anyone an idea of what this could be?
Thanks all!
I have an ideal logic Combi max2 30kwh that was installed in my hose prior to buying it.
It’s a one zone system with TRVs and an Ideal Halo WiFi thermostat.
It feeds 11 radiators in total, they are all type 22 and replaced at time of boiler I think.
1600x500 X 2
1800 x 500
1200x500 x3
1000x500
700x500
500x500 x3
There is one bypass road which is a 500x500 and the rest have TRVs
The issue I’m having is radiators upstairs close to the boiler all hiss, no matter what is done. It’s less so with fully open trv.
I can live with that but what’s getting to me is, where upstairs meets downstairs in the wall there is pipes carrying the flow/return (Qualplex) and these have a tapping/ticking noise a lot of the time. I was wondering is this due to the boiler being oversized and when trvs close the pressure is too high. There’s no external ABV from what I can tell.
As a diagnostic measure I picked a larger radiator in the hallway 1600x500 and fully opened the trv and lockshield as a makeshift bypass but the issue stayed the same. Before doing this the boiler would run for a few minutes then the pump overrun would kick in fairly quickly. This 1600x500 blasting all the time has helped that a bit.
Also I have been getting lots of “pump fault” errors
Has anyone an idea of what this could be?
Thanks all!
