Radiator getting hot

[graham1]

 

i Have recently posted this problem and all responses suggest 3 way valve but only 2 radiators heat when DHW is on  even tho heating off.

Could it be piping set up incorrectly

[ProDave]

Has it EVER worked properly or has it always been like this?

 

My guess is common return pipe for heating and HW and convection flow when hot water is circulating to the HW tank and only a couple of upstairs radiators getting hot.

[tonyshouse]

Unwanted convection, a check valve will stop it I hope 

[Nickfromwales]

@graham1

 

It is unhelpful and laborious for you to start another thread to discuss this  

Already discussed and open here for further input……

 

 

[graham1]

  On 18/02/2022 at 20:04, ProDave said:

Has it EVER worked properly or has it always been like this?

 

My guess is common return pipe for heating and HW and convection flow when hot water is circulating to the HW tank and only a couple of upstairs radiators getting hot.

Expand  

Been like this from installation - Only 2 downstairs radiators affected.

 

Not sure if this is the right way to respond!! Any advice appreciated