Troubleshooting a Hot Water Pressure Washer: Part 2

Built from the highest quality components available, Mi‑T‑M hot water pressure washers are the best in the industry. With proper maintenance, these pressure washers will perform for many years. A problem with your pressure washer may be easily diagnosed. This video will show you what to do when the burner will not shut off when the trigger gun is released.

With the trigger gun released and the burner still firing, first unplug the fuel solenoid wire from the fuel solenoid coil. If the burner continues to fire with the wire unplugged, then the fuel solenoid piston and coil assembly must be replaced.

Contact a qualified Mi‑T‑M Service Center or the Mi‑T‑M Technical Services department for assistance. If the burner does shut off when the fuel solenoid wire is unplugged, it is an indication that either the unloader valve is not going into bypass, or the pressure switch is bad.

To determine if the unloader valve is going into bypass, release the trigger on the gun and listen for the engine to go into a higher RPM. When you squeeze the trigger on the gun you should hear the engine RPM slow down. This indicates that the unloader valve is working correctly. If you are unsure the unloader valve is working correctly or if you suspect the pressure switch is bad, please contact a qualified Mi‑T‑M Service Center.

As with all equipment, preventive maintenance of your hot water pressure washer will help to avoid many of these problems. Please take the time to review the preventive maintenance video on this website. If you do experience burner issues with your Mi‑T‑M hot water pressure washer, contact an authorized Mi‑T‑M Service Center or the Mi‑T‑M Technical Services department to receive professional help to get you back up and running.