Buying this "service deal" can be expensive but if you feel happier knowing that you are protected from breakdown for a few years, shop around insurance brokers to see how prices compare.

Choose a dishwasher with sturdy compression springs in the door. Also look for tough, lightweight nylon or graphite racks with cushioned tips that protect glassware and cookware. Weimer recommends choosing a model with a rack design that provides the largest, most flexible interior space and is configured for your belongings, including odd-shaped pieces.

Energy efficiency is of paramount importance, not only to save money on electricity bills but also to help reduce power station emissions that contribute to global warming. Look for brands with low energy consumption (energy efficiency ratings will be displayed in the showroom). Levels are now as low as 1.3kW/hr on some slimline models largely because of reduced water consumption. A delay timer can help take advantage of cheap overnight electricity.