MYSTERIOUS FLOW

[BENNO123]

HI CAN ANYONE HELP?
I PUT A NEW BOILER IN ON EXISTING RADIATORS. MY OLD BOILER WAS A BOSCH 26CDI AND THE NEW BOILER IS A BIASI 24SE WHEN I FIRST TURNED THE NEW BOILER ON ONLY THE LAST RAD UPSTAIRS WOULD HEAT UP .
SO I DRAINED THE SYSTEM DOWN AND RELEASED THE STUCK THERMOVALVES ON THE OTHER RADS.
I REFILLED THE SYSTEM AND TRIED AGAIN THIS TIME ONLY THE TWO RADS DOWN STAIRS WILL WORK ,UPSTAIRS ARE COLD I DONT THINK THERE IS A BLOCKAGE ANYWHERE.
CAN ANYONE HELP ME PLEASE

 

[PaulAH]

DO NOT USE CAPITAL LETTERS. No one will reply to people who shout, apart from me.

The problem is obvious. Either /or

- One or more of the radiator valves (presumably that's what you're talking about) is stuck

- You have a blockage (why do you say you don't think there is one?)

- You have a massive airlock (plenty of advice elsewhere)

 

[Agile]

One wonders if this boiler has been fitted within the last six months?

If so it should have been a condensing boiler ( e.g. a Biasi M96 )

One also wonders if it was fitted by a CORGI registered installer and the Building Regulations Benchmark Certificate has been completed and CORGI notified?

Tony Glazier