A radiator attached to a pressurized, combi-fed, central heating system doesn't get hot (it gets just slightly warm).
- I've bled it but this makes no difference.
- The radiator is fed from what is essentially a spur off the same pipes as a second radiator, which does get very hot. Turning this "hot rad" off, in the hope that all the water will go to the cold radiator, doesn't achieve the desired result.
- I've checked and now both the radiator tap, and the valve at the other end, are full open (assuming they're working - perhaps they're not?).
- Finally, this radiator is on the ground floor, but fed from the first floor so crap could easily be coming down the pipes, blocking them and never getting away again.
So, what next? "Reinstall the entire pipework" is not an option so I intend to "flush" the pipework. Before I start, any tips? I'm planning to (after turning off the heating)...
1. Close of the pipes to the radiator (there are values which allow this - no idea why they were originally installed!)
2. Close off the radiator taps
3. Remove the radiator
4. Flush the radiator with a hose
5. Connect a hose to the radiator taps
6. Get the wife to open the radiator taps whilst I maintain pressure using the "fill" loop from the boiler. I'm hoping this will provide enough pressure to flush crap out along the hose and clear the taps.
7. Replace the radiator.
Clearly I'm no heating expert, but any suggestions for making this as painless an exercise as possible would be appreciated.
Thanks, Paul DS