Dayton Operating Instructions and Parts Manual
Model 3VG79B
Troubleshooting Chart
Symptom
Motor does not start five seconds after heater is plugged in
Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.
Possible Cause(s)Corrective Action
1. | No power to heater | 1. | Check circuit breaker in electrical panel |
2. | Thermostat setting to low | 2. | Turn thermostat knob clockwise to a |
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| higher setting |
High Voltage!
| 3. | Bad electrical connection between motor | 3. | Check all electrical connections. See | |||
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| and ignition control assembly or ignition |
| Wiring Diagram, page 14 | ||
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| control assembly and power cord |
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| 4. | Blown fuse on ignition control assembly | 4. | See Ignition Control Assembly, page 9 | |||
| 5. | Binding pump rotor | 5. | If fan does not turn freely, see Pump | |||
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| Rotor, page 8 |
| 6. | Defective ignition control assembly | 6. | Replace ignition control assembly | |||
| 7. | Defective motor | 7. | Replace motor | |||
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Motor starts and runs but heater does not | 1. No fuel in tank | 1. | Fill tank with kerosene | ||||
ignite | 2. Pump pressure incorrect | 2. | See Pump Pressure Adjustment, page 6 | ||||
| 3. | Dirty fuel filter | 3. | See Fuel Filter, page 7 | |||
| 4. | Obstruction in nozzle assembly | 4. | See Nozzle Assembly, page 8 | |||
| 5. | Water in fuel tank | 5. | Drain and flush fuel tank with clean | |||
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| kerosene. See Storing, Transporting, or |
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| Shipping, page 9 |
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| High Voltage! |
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| 6. | See Fuel Valve, page 7 |
| 6. | Defective fuel valve | |||||
| 7. | Bad electrical connection between | 7. | Check electrical connections. See | |||
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| ignitor and ignition control assembly |
| Wiring Diagram, page 14 | ||
| 8. | Defective ignitor | 8. | Replace ignitor, see page 7 | |||
| 9. | Defective ignition control assembly | 9. | Replace ignition control assembly | |||
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Heater ignites but ignition control | 1. Pump pressure incorrect | 1. | See Pump Pressure Adjustment, page 6 | ||||
assembly shuts heater off after a short | 2. Dirty air intake, air output, and/or lint | 2. | See Air Output, Air Intake, and Lint | ||||
period of time |
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| filter |
| Filters, page 6 | ||
| 3. | Dirty fuel filter | 3. | See Fuel Filter, page 7 | |||
| 4. | Obstruction in nozzle assembly | 4. | See Nozzle Assembly, page 8 | |||
| 5. | Photocell assembly not properly | 5. | Make sure photocell boot is properly | |||
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| installed (not seeing the flame) |
| seated in bracket | ||
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| High Voltage! | 6. | Clean photocell lens |
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| 6. | Dirty photocell lens | |||||
| 7. | Bad electrical connection between | 7. | Check electrical connections. See | |||
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| photocell and ignition control assembly |
| Wiring Diagram, page 14 | ||
| 8. | Defective photocell | 8. | Replace photocell | |||
| 9. | Defective ignition control assembly | 9. | Replace ignition control assembly | |||
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Version B - For Reduction | G016.J |