Why are my radiators not all coming on, some barely heating up etc

[StephD]

Hello,

So we have a two year old boiler and have cleaned / flushed the system twice recently but not all radiators will heat at the same time. All radiators have the ability to heat when the others are isolated so not likely the TRV. have been attempting to balance but seems like maybe not enough power to heat all at the same time?

At a loss.. not sure what else it could be, will get a plumber in but want to try everything we can first.

Any advice please

 

[Ben-gee]

Balance it properly, that’s what you need to do.

 

[Gasmk1]

Type of boiler, did it all work before new boiler, did you have a new pump fitted.