Not enough heat

[Wagger]

We have recently had oil fired central heating installed.
All radiators have TRVs. We also have a system thermostat in the hall, set at 25 degrees.
When the heating is first switched on all radiators become hot or very hot but our rooms and the main thermostat reach only 19/21 degrees. After around 2 hours the 5 or 6 radiators furthest from the boiler start to cool and while they warm up intermittently the rooms never get above 19/21. All TRVs are set at 5.
The system has been balanced and we are satisfied that this is not a boiler problem. Our plumber is stumped. Any ideas?

 

[rpm]

We have recently had oil fired central heating installed.
All radiators have TRVs. We also have a system thermostat in the hall, set at 25 degrees.
When the heating is first switched on all radiators become hot or very hot but our rooms and the main thermostat reach only 19/21 degrees. After around 2 hours the 5 or 6 radiators furthest from the boiler start to cool and while they warm up intermittently the rooms never get above 19/21. All TRVs are set at 5.
The system has been balanced and we are satisfied that this is not a boiler problem. Our plumber is stumped. Any ideas?

Welcome to the forum Wagger however to keep this thread open and receive help I`m afraid you must register as a member rather that as a guest and post the Q again.

 

[Dotty]

Please register with us and start a new thread to receive an answer to your question.

 

[Rickster123]

He has gawd bless him!