Heizkörper Sanitär Entlüftung Schlüssel Schlüssel Massivmessing zum Entlüften Luftventil
ab 4,70 €
When you have checked that the boiler pressure is correct, turn on your central heating and check the radiators have not got any cold places. If there are still cold spots, your central heating system may have sludge and debris which is stopping it from working efficiently.
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