AVA's high-pressure washers are not intended as hot water pressure washers, and you should not use water hotter than a maximum of 40 degrees celsuis. This, in almost all washing cases, will be enough for most grime dirt to loosen.
If you are faced with a particularly challenging task, you can apply soap, that aften replaces the need for hot water. Combined with the AVA foam cannon, you can use the perfect soap for the job!
By supplying hot water to the pump, the service life is reduced somewhat, and the higher the temperature, the faster the wear.
One of the risks with using hot water is that although this can be adjusted fairly easily to a specific temperature (for example 35 degrees), if someone in the same household uses cold water, the pressure drops, and the temperature rises can rise (think of someone using water in another part of your house when you are in the shower - suddenly you are either quite cold, or boiling hot!). If you exceed 40 degrees, the pump will stop working relatively quickly, and you will have to service it to get it back into working order.