When the heating system is on, there are two radiators that are taking a long time to heat up, then not very hot. A third radiator remains cold.
Radiator not heating up
- Thread starter fsalo1
- Start date
try bleeding and balancing them 
Thanks for that, however, please can you tel me if I can bleed the radiator with the system on.
off is ok
depends on your system
depends on your system
Not sure this is good but I found a great way of bleeding major air from system.
1) Turn off system and wait for pump overrun to cease.
2) Close both valves on rad
3) Open bleed valve and hold suitable receptacle under valve to collect water untill it stops flowing.
4) Once water stops open flow valve
5) After air stops flowing and water appears again, close bleed
6) Close flow valve
7) Open bleed
8) Open return
9) When water flows again and all sounds of air expulsion have finishef close bleed
10) Open both valves to their balance
I remove heaps of air with this method, admittedly it was after a flush and fill but the theory may work
1) Turn off system and wait for pump overrun to cease.
2) Close both valves on rad
3) Open bleed valve and hold suitable receptacle under valve to collect water untill it stops flowing.
4) Once water stops open flow valve
5) After air stops flowing and water appears again, close bleed
6) Close flow valve
7) Open bleed
8) Open return
9) When water flows again and all sounds of air expulsion have finishef close bleed
10) Open both valves to their balance
I remove heaps of air with this method, admittedly it was after a flush and fill but the theory may work
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