DeVilbiss pressure washer troubleshooting

A pressure washer makes a rumble, does it get water or is it leaking? These and other issues can be resolved using your own resources and the table of troubleshooting. Do not rush to call the service, first of all, you should understand why there was a failure in the work, because the reason may be just a water outage in the house or an incorrect connection.

DeVilbiss WG1530 pressure washer troubleshooting

Engine will not start or stops while operating. • Low on fuel. • Fill with gasoline.
• Ignition switch in “Off” position. • Turn to “ON” position.
• Faulty spark plug. • Replace spark plug.
• Cold engine/engine not choked. • Set lever to “Full Choke” position
• Unit loaded during start-up. • Reduce pressure at pressure regulator knob.
• Spark plug wire loose. • Attach wire to spark plug.
• Fuel tank not venting properly. • Replace fuel tank cap.
Engine is running but pump is not building maximum pressure or has irregular pressure. • Water faucet closed. • Open water faucet.
• Unit has been allowed to freeze. • Thaw out unit completely.
• Garden hose kinked. • Straighten hose.
• Water inlet screen clogged with debris. • Clean water inlet screen.
• Pressure regulator on pump not set correctly. • Adjust pressure regulator clockwise for more pressure.
• Unsuitable or worn out nozzle. • Replace nozzle.
• Air trapped in pump. • Run unit with gun open and wand removed.
Enaine is overloaded. • Nozzle partially blocked. • Clean nozzle.
Water leaking from head. • Head O-Ring worn. • Take to Authorized Service Center.
Water leaking from bottom of pump. Oil leaking from bottom of pump. • Piston seals worn.
• Piston seals worn.
Noisy Pump. • Pump sucking air. • Take to Authorized Service Center.
No low pressure detergent delivery. • Nozzle set in wrong position. • Push nozzle forward.
• Siphon hose or filter plugged. • Unplug siphon hose.
• Siphon check valve clogged in pump. • Take to Authorized Service Center.
• Detergent regulator on pump closed. • Open detergent regulator.


DeVilbiss 2020CWVB pressure washer troubleshooting

Problem Cause Correction
Engine will not start 1. No fuel 1. Add fuel.
2. Pressure builds up after two pulls on the recoil starter or after initial use. 2. Squeeze gun trigger to relieve pressure.
3. Choke lever in the “No Choke” position. 3. Move choke to the “Choke” position.
4. Spark plug wire not attached. 4. Attach spark plug wire.
5. Engine ON/OFF switch in OFF position. 5. Place engine ON/OFF switch in ON position.
6. Choke lever in the “Choke” position on a “hot” engine or an engine that has been exposed to thermal heat for a long period of time. 6. Move choke to the “No Choke” position.
No or low pressure (initial use) 1. High pressure nozzle is not installed. 1. See How to Use Spray Wand instructions in the Operation Section.
2. Low water supply. 2. Water supply must be at least 5 GPM @ 20 PSI.
3. Leak at high pressure hose fitting. 3. Repair leak. Apply sealant tape if necessary.
4. Nozzle obstructed. 4. See Nozzle Cleaning instructions in the Mainte- nance section.
5. Water filter screen clogged. 5. Remove and clean filter.
6. Air in hose. 6. Turn off the engine, then the water source. Disconnect the water source from the pump inlet and turn the water source on to remove all air from hose. When there is a steady stream of water present, turn water source off. Re-connect water source to pump inlet and turn on water source. Squeeze trigger to remove remaining water.
7. Choke lever in the “Choke” position. 7. Move choke to the “No Choke” position.
8. High pressure hose is too long. 8. Use high pressure hose under 100 feet.
Will not draw chemicals 1. Low pressure soap nozzle not installed. 1. See How to Use Spray Wand paragraph in the Operation Section.
2. Chemical filter clogged. 2. Clean filter.
3. Chemical screen not in cleaning solution. 3. Make sure end of chemical hose is fully sub- merged into cleaning solution.
4. Chemical too thick. 4. Dilute chemical. Chemical should be in the same consistency as water.
5. Pressure hose too long. 5. Lengthen water supply hose instead of high pressure hose.
6. Chemical build up in chemical injector. 6. Have parts cleaned or replaced by AWSC.
No or low pressure (after period of normal use) 1. Worn seal or packing. 1. Have replaced by AWSC.
2. Worn or obstructed valves.
3. Warn unloaded piston. 3. Have replaced by AWSC.
Water leaking at gun/spray wand connection 1. Worn or broken O-ring. 1. Check and replace.
2. Loose hose connection. 2. Tighten.
Water leaking at pump 1. Loose connections. 1. Tighten.
2. Piston packing worn. 2. Have replaced by AWSC.
3. Worn or broken O-rings.
4. Pump head or tubes damaged from freezing.