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Bleed heater bodyNot only older radiators, but also newer models have to be vented frequently. Because it happens that the heating of sooner or later strange-sounding sounds of itself, or at the same time even reduces their heating power massively.
To prevent these problems and, above all, to avoid wasting unnecessary energy, it makes sense to bleed the heating at regular intervals.
It is important that either a square key or a special vent key and a bucket and a dry cloth are prepared beforehand.
Venting radiators is indeed "not rocket science"
Once the vent valve is opened with the vent key, it is possible for dark, stale water to spurt out. Experts refer to this stale liquid as "dead" or as recirculated water. Attention: it may be of very high temperature, so in any case a careful opening of the valve is advised. The valve must now remain open until no more air escapes.
Depending on the heating model
It can sometimes be that after a few minutes no more water leaks and as a result, the raising of the system pressure is required. According to experts, again, the pump pressure is set too high, if the heater continues to hear bubbling noises, but still gives off a certain amount of heat. This is often the case with outdated equipment; modern radiators, on the other hand
are usually equipped with an electronically controlled pump.
Every heater should be checked from time to time
Normally, after a few minutes all air has escaped from the heater, and the device is fully functional again. Occasionally, water may need to be filled into the heating system, which is usually unnecessary with newer devices.
Older radiators, which in turn require frequent refilling of fluid, should be checked by a heating engineer. Because this usually determines very quickly whether under certain circumstances technical impairments are present and therefore spare parts must be used.