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TROUBLESHOOTING
PROBLEM | POSSIBLE CAUSE | SOLUTION |
LOW OPERATING | Water supply is insufficient | Use larger supply hose; clean filter at water |
PRESSURE |
| inlet. |
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| Spray nozzle is old, worn or incorrect | Match the nozzle number to the machine |
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| and/or replace with new nozzle. |
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| Belt slips | Tighten or replace belt; use correct belt. |
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| Plumbing or hose is leaking | Check plumbing system for leaks. Retape |
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| leaks with teflon tape. |
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| Unloader is faulty or misadjusted | Adjust unloader for proper pressure. Install |
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| repair kit when necessary or replace. |
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| Packing in pump is worn | Install new packing kit. |
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| Discharge valve in pump or inlet is fouled | Check inlet and discharge valve. |
| or dirty |
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| Discharge valve or inlet is worn | Replace with valve kit. |
| Spray nozzle has obstruction | Remove obstruction. |
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| Steam pressure control valve is leaking | Rebuild or replace as necessary. |
| (where applicable) |
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| Engine RPM is slow | Set engine speed at proper specifications / |
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| see serial plate. |
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BURNER WILL | There is little or no fuel | Fill tank with fuel. |
NOT LIGHT |
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Improper fuel or water in fuel | Drain fuel tank and fill with proper fuel. | |
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| Fuel line is clogged | Clean or replace fuel line. |
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| Fuel filter is plugged | Replace fuel filter as needed. |
| Burner air bands are misadjusted | Readjust air bands for clean burn. |
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| Little or no fuel pressure from fuel pump | Increase fuel pressure to specification and/ |
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| or replace fuel pump. |
| Burner transformer is faulty | Test transformer for proper arc between |
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| contacts. Replace as needed. |
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| Electrical wiring is disconnected or has | All wire contacts should be clean and tight |
| short in it | with no breaks in wire. |
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| Flex coupling is slipping on fuel pump | Replace if needed. |
| shaft or burner motor shaft |
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| Check for electrical current reaching burner | |
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| assembly with burner switch on. Replace |
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| switce if needed. |
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| Heavy sooting on coil and burner can | Clean as required. |
| cause interruption of air flow and shorting |
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| of electrodes |
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| Electrode setting is improper | Check and reset according to diagram in |
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| manual. |
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| 25 amp circuit breaker tripped | Push in reset button. |
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| Bridge rectifier defective | Test and replace. |
| 12V DC relay defective | Test and replace. |
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| Fuel is not reaching combustion chamber | Check fuel pump for proper flow. Check so- |
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| lenoid flow switch on machines with spray |
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| gun control for proper |
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PRESSURE WASHER Troubleshooting Guide
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