There can be several reasons why your radiator is not working correctly. The list below presents the most common causes and what you should do to deal with them.
Does your radiator feel cold in places, even though it is on? This may be caused by air in your radiator. Air trapped in your radiator can prevent the hot water from circulating efficiently. The solution is to bleed your radiator. Bleeding radiators is a relatively simple process which you can generally take care of yourself.
If your thermostat is not working or if it is incorrectly set, this can prevent your radiator from heating properly. Try adjusting the setting on your thermostat to check whether this produces the desired changes.
Some indications that there may be problems with your radiator thermostat:
In some cases, the solution may be as simple as replacing the batteries if your thermostat is battery-powered. In other cases, you may need to replace the thermostat itself.
If the pump in your heating system is defective, this may prevent the hot water from circulating correctly to the radiators. In that case, it is a good idea to call in a professional to check your pump and repair it if necessary. Here are some indications that the pump may be the problem:
If the pipes to your radiators are blocked or damaged, this can prevent hot water from reaching the radiators. You will need to call in a professional to deal with this sort of problem. Here are some indications that the pipes are the source of the problem:
Sludge and deposits can build up inside your radiators over time, eventually preventing the hot water from circulating correctly. This may result in your radiators feeling cold, especially at the bottom. A professional can flush your heating system to remove any sludge that may have built up. Here are some indications that unwelcome sludge has built up in your radiators:
Many symptoms of problem issues are quite similar. If you are still unsure why your radiator isn’t working properly, try carrying out the most basic and straightforward repairs first. For example, start by bleeding your radiators. If the problem persists, move on to the next possible cause.
Look out for any additional symptoms that may help pinpoint the cause of the problem. For example, if only one radiator is not working, it is more likely that the problem has to do with the pipes leading to that particular radiator, than with the thermostat and the pump.
If you cannot work out why your radiator is not working, the best move is to call in a professional. A plumber or a heating technician should be able to diagnose the problem and suggest an appropriate solution.