Started right up but no pressure?

Hello sir, that is a on going problem with power washers the pump not working, than works sporadically. the main cause is leaving the pressure hose hooked up to the machine over a long period of ,not draining hose & machine, in the winter time the hose & pump willfreeze causing hose & pump to expand and burst. build up of calcium deposits from hard water clogging up pump nozzle,valves in the gun handle,clogging hose fittings and screens.one of these has to be your problem.you can find a parts brake down at KARCHER.COM.orRJ BOWERS.COM . and manuals,these are good info,sites,hope this helps, MrFixIt,oh could you please rate this solutions.thankyou%^&