Sometimes bleeding a radiator does not cure the problem of it not getting hot, if this happens and the radiator has never worked since it was installed or last removed/refitted then:
* Check that the shield valve is not closed down too far - have a look at this page.
* Check that if a thermostat valve is fitted, it is on the inlet to the radiator not the outlet - these types of valve often need the flow of circulating water to lift the valve off its seat.
If the radiator is not getting hot but it has worked fine at sometime since any work was carried out:
* An air lock may have developed in the pipe work.
* The inlet or outlet of the radiator may have become blocked, Try opening up both the control and shield valves (count the number of turns on the shield valve so you can reset it).
If all else fails, the radiator will need to be removed and the individual components checked for any blockage.
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