Table 2-1.—Troubleshooting Procedures

Table 2-1.—Troubleshooting Procedures Component Malfunction Corrective Check Water Heater Fails to start 1. Electrical power source 2. Load limit switch 3. Flame safeguard control 4. Blower motor reset 5. Water supply in tank 6. Low-water probe 7. Low-water relay Burner Flame failure during fire cycle 1. Fuel supply 2. Fuel hoses 3. Fuel nozzle 4. UV scanner 5. Flame safeguard control 6. Fuel pump strainer 7. Fuel pump drive coupling 8. Fuel pump 9. Fuel solenoid valve Burner Fuel Pressure Gauge Fails to ignite or is delayed Pressure too high 1. Fuel supply 2. Fuel hoses 3. Burner nozzle 4. Water in fuel 5. Electrodes 6. Ignition transformer 7. Burner to transformer connection 1. Fuel Gauge 2. Fuel Pump 3. Fuel nozzle 4. Fuel hose (return) Fuel Pressure Gauge Pulsating pressure 1. Suction hose 2. Fuel pump strainer 3. Fuel filter 4. Burner nozzle 5. Pressure Gauge Fuel Pump Noisy 1. Suction hose 2. Fuel pump strainer 3. Fuel filter 4. Fuel pump Fuel Pump Leaks 1. Strainer cover 2. Plugs 3. Shaft seals 4. Fuel pump for cracks 2-6