Why is my bosch aqt 3400 power hose not starting?. I have checked fuse- ok. I used it recently- last 2 weeks. with no problems.
First, check the plug end test/reset. Plug in the cord to an outlet and press the TEST button. You may, or may not hear a 'click'. Press the RESET button, and it should hold itself in the down position. If that happens, then things are ok there. If not, the overload protection is not working and would need to be replaced.
Second, did you use a pump flush/lube? When the pump is used, it creates a lot of heat. When that happens, water carries away the lubrication, moving parts can gall, the seals dry, and the motor can't overcome the drag at start. This could 'pop' the GFI on the electrical plug on your machine. Letting the machine sit allows the heat buildup to evaporate the water in the pump, and scale forms, especially if you use almost any kind of soap or detergent. Don't use soap/detergent with any of the high pressure nozzles, always use the low pressure attachment. Flush the pump, then use the high pressure attachment.
One more thing, check the pressure hoses going to the pressure switch, and the switch itself. When you release the trigger on your handle grip, the motor shuts off with the pressure buildup. If it will not open again, the diaphragm switch could be stuck.
I hope this helps you, and much luck to you.
Cars & Trucks
33 minutes ago