Hello christian22.

We are sorry to hear of your experience. When storing your pressure washer over the winter or for longer than 30 days, make sure it’ll be ready for your next cleaning project. This is called “winterizing”. The term is somewhat confusing because your storage period may or may not happen in cold temperatures or even during winter. Your manual will have specifics. Nevertheless, this procedure is strongly recommended to be done every time the unit may sit for longer than thirty days without being used. Whether stored inside or out, heated space or cold, winter or summer. This keeps the unit from freezing and, very importantly, it keeps water from drying out inside the pump and leaving behind very harmful deposits. These deposits will act like sandpaper in the seals the next time it is used and could damage a piece of the brass. This also keeps any parts from rusting or oxidizing which may destroy your pump. We would recommend contacting Greenworks by Live Chat on www.greenworkstools.com or by phone at 1-888-909-6757 for a proper evaluation. This is not a difficult part to replace. So, it should be a fairly smooth process. All we ask is users have the unit, and receipt or invoice handy so that we can gather all necessary unit details.