The invention in particular is directed to a household appliance, such as a washing machine or dishwasher, comprising a heat pump arrangement (3) with a heat pump (4, 5, 6) adapted to transfer heat to an operating medium (2) of the appliance (1, 3), with a closed storage tank (9) adapted to receive a phase change substance (10) and being heat exchangeably coupled with a process side (5) of the heat pump (4, 5, 6), with at least one sensor (11) adapted and arranged to detect an actual phase state of the phase change substance (10), and with a recovery unit (12) adapted and operable to actively recover the phase change substance (10) in dependence of a signal of the sensor (11).