Radiators Not All Heating :(

[hendinho83]

Hi all, newby here

had a few problem with my heating lately.
When the heating is on a selection of radiators get hot, and the others just warm.

i've looked through the internet and they don't seem to be dependant on the distance from the boiler, and i've bled them all too.

any ideas? or what extra information may i need to give?

thanks in advance

 

[tomy]

Type of system ,ie conventional or a combi ?, age ?, are there thermostatic valves?

 

[hendinho83]

hi there -

its a combi boiler - roughly 5years old now and yes i have thermostatic valves on all radiators

 

[tomy]

thermostatic valves could be stuck on some rads

 

[omegaman]

Has anything been altered in the system? (Probably not but still worth asking)

 

[hendinho83]

i've changed nothing in the system - was fine last winter but this winter ive got problems

how would i go about fixing thermostatic valves if they are stuck$?

my dad seems to think it could be the pump but my boiler (Baxi) has an LED display that 'should' illuminate when there is a pump fault

 

[nogoodatfaultfinding]

Take the head off the TRV's on the cold rads and tap the pin with a hammer.
If you find this solves the issue then think about replacing them as they will probably do it again and again and again.