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Emily Ward DDSAug 18, 2025
What to do if the DHW stays cold on my Buderus Controller?
- WWilliam RodriguezAug 18, 2025
If the DHW (Domestic Hot Water) remains cold, there could be several reasons. First, check for constant drawing or system leaks and stop any leaks. Also, the temperature sensor may be incorrectly connected, fitted, or faulty, so check the sensor connection, lead, and mounting, and compare resistance values with the sensor curve. Finally, the cylinder primary pump could be incorrectly connected or faulty; verify it's working, possibly by running a function test.
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