Domestic hot water does not reach target temperature: what could be the cause

When DHW does not reach the desired setpoint, the problem may lie in the automation, the three-way valve, or the available thermal power.

Tank sensor

An incorrect reading can stop the charging process prematurely.

Three-way valve

If it does not fully change position, part of the flow may continue towards the heating circuit.

High setpoint

Under certain conditions, the heat pump may require a backup heater for very high DHW temperatures.

Check

Tank temperature, supply, valve position, and actual compressor operation are recorded.