How to bleed your radiator: A simple guide for winter warmth

When cooler days approach, it is important that our radiators work efficiently. Bleeding radiators is a key procedure that impacts the quality of heating in the home. Air that accumulates in the heating system can reduce the efficiency of the radiators, resulting in less thermal comfort in the rooms. Additionally, air-blocked radiators often emit annoying noises, such as gurgling or hissing.

Regularly bleeding radiators also helps avoid costly repairs. Air in the heating system causes some parts of the system to work harder, leading to faster wear and tear. Consequently, a well-maintained heating system is more efficient and less prone to malfunctions.

The cause of air-blocked radiators can be improper filling of the system with water, during which air enters the system. Air may also seep into the system through microcracks in the seals. Another source of air can be bubbles trapped in the tap water supplied to the heating system.

Before you start bleeding the radiator, it is worth preparing adequately. For this task, you will need: a flathead screwdriver, a container for water (e.g., a bowl or bottle), and a towel or cloth to protect the floor from contamination.

Bleeding a radiator is a relatively simple process. The first step is to locate the bleed valve, which is usually on the top part of the radiator. Then place a container under the bleed valve to collect the escaping liquid. Gently unscrew the bleed valve screw using a screwdriver. At this point, air and water will start to escape – it's good to wait until the water flows steadily out of the bleed valve.

When the air stops coming out and the water pressure stabilizes, tighten the bleed valve screw and check the radiator for leaks. If, despite bleeding, the radiator still does not function properly, check whether the valves on the connecting pipes are open. Turning them a few times in both directions might unblock the water flow and improve the radiator's operation.

Sometimes, it may happen that after bleeding the radiator is still cold. In such cases, it is worth checking the valves again and ensuring the bleeding was done properly. If the problem persists, it may be due to another element of the heating system, and consultation with a professional may be necessary. Leaky valves are a common issue. If the radiator leaks after bleeding, try tightening the connections again. In older systems, it may be necessary to use gaskets or pipe tape to seal the threads.

Regularly bleeding radiators is key to their longevity. It is worth performing this task at the beginning of the heating season and whenever you notice uneven heating or hear suspicious noises. Besides bleeding, radiators should also be cleaned regularly. Dust and dirt accumulation can affect heating efficiency. Using a soft cloth to clean the radiator’s surface helps keep it in good condition. To prevent the radiator from getting air-blocked again, it is also worth regularly checking the valve seals and tightening them if necessary.