Neglectful owners can give perfectly good heat pumps a bad name. It has been calculated that an incredible 90% of all heat pump failures come down to insufficient cleaning and maintenance, and a total lack of heat pump servicing. A heat pump that has been designed and manufactured to work for many years often falls well short of that mark simply through this lack of attention. That’s a massive waste of a brilliant piece of technology, not to mention precious money. To be fair though,  heat pump maintenance and servicing can be easy to overlook when the appliance is doing...