no heat to 3rd floor

[gb11]

Hoping someone can help. The last three plumbers I've met can't
I've had intermittent faults with my gas boiler, but always the same fault. When the heating to the he third floor of my house will not heat the radiators.
It's easily enough fixed by bleeding the rads, but I have been told that it'. Either a pin hole leak in the system or the diaphragm in the pressure vessel is burst.
I added another pressure vessel to elimate at least one or the other but the fault continued.
I added fernox to the system and this helped, well for three months anyway. Now I'm back to the same issue.
I was going to pressure test the system but it's only losing 1.5 bar over three weeks, so have been advised that this would be useless.

Anyone out there who can give me a solution as . Seem to be going round in circles and the different advice from my own plumbers obviously isn't helping.[/code]

 

[Blagard]

Hoping someone can help. The last three plumbers I've met can't

What work have the plumbers actually done?

I added another pressure vessel to elimate at least one or the other but the fault continued.

That won't fix the other one if it is faulty, do you mean you replaced it or did one of the plumbers?

I've had intermittent faults with my gas boiler, but always the same fault.

What was the boiler fault or are you just saying it is a system problem with the third floor radiators

 

[dcawkwell]

I think you'll find if you switch all the radiator off except those on the 3rd floor the 3rd floor they will get hot.
If this is the case the system just needs balancing up. Provided you have up to about 12-13 radiators on a standard central heating pump.

Hoping someone can help. The last three plumbers I've met can't
I've had intermittent faults with my gas boiler, but always the same fault. When the heating to the he third floor of my house will not heat the radiators.
It's easily enough fixed by bleeding the rads, but I have been told that it'. Either a pin hole leak in the system or the diaphragm in the pressure vessel is burst.
I added another pressure vessel to elimate at least one or the other but the fault continued.
I added fernox to the system and this helped, well for three months anyway. Now I'm back to the same issue.
I was going to pressure test the system but it's only losing 1.5 bar over three weeks, so have been advised that this would be useless.

Anyone out there who can give me a solution as . Seem to be going round in circles and the different advice from my own plumbers obviously isn't helping.[/code]