Anyone can make a dirty surface look cleaner. The difference between that and a professional finish is not the machine, and it is not effort. It is a set of habits that stop you from leaving stripes, damaging substrates, wasting chemicals, and getting called back. Here are the ten that matter most, from a workshop that repairs the machines afterwards.
Water expands by roughly nine per cent when it freezes. A pump head is a rigid, sealed casting with water trapped inside it. That is the whole problem, and it is why frost damage is the second most common pressure washer failure we repair, after water starvation. It clusters in November and February; it arrives in batches after the first hard night of the season, and it is almost always excluded from warranty because it is preventable.
