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Laura ColeJul 26, 2025
Why is my Buderus RC20 DHW remaining cold?
- BBrittany RobertsonJul 26, 2025
If the DHW remains cold, it might be due to several reasons. There could be a constant drawing of water or a system leak, in which case, fix the leak if necessary. The sensor might be incorrectly connected or mounted, the sensor cable could be broken or short-circuited, or the sensor itself might be faulty; check the sensor connection and cable, ensure the sensor is correctly mounted on the storage cylinder, and compare the resistance value with the sensor curve. Alternatively, the charge pump might be connected incorrectly or is faulty, so check the operation of the charge pump.
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