Dayton Operating Instructions and Parts Manual
Model 3VG80
Troubleshooting Chart
Never attempt to service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur.
| Symptom | Possible Cause(s) | Corrective Action |
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| Fan does not turn when heater is plugged | 1. No electrical power to heater | 1. Check voltage to electrical outlet. If | ||
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| voltage is good, check heater power | ||
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| cord for breaks | ||
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| 2. Fan hitting inside of heater shell | 2. Adjust motor mount/fan guard to keep | ||
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| fan from hitting inside of heater shell. | ||
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| Bend motor mount/fan guard if | ||
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| necessary | ||
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| 3. Fan blades bent | 3. Replace fan. See Fan, page 8 | ||
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| 4. Defective motor | 4. Replace motor. See Motor, page 7 | ||
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| Heater will not ignite | 1. User did not follow installation or | 1. Repeat installation and operation | ||
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| operation instructions properly | instructions. See Installation, page 6 and | ||
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| Operation, page 6 | ||
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| 2. No spark at ignitor. To test for spark, |
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| follow step 8 under Ignitor, page |
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| 13. If you see spark at ignitor, have |
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| heater serviced by qualified service |
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| person. If no spark seen: |
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| A) Loose or disconnected ignitor wire | 2. A) | Check ignitor wire. Tighten or | |
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| reattach loose ignitor wire. See | |
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| Figure 11, page 9 for ignitor wire | |
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| location | |
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| B) Wrong spark gap | B) | Set gap between ignitor electrode | |
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| and target plate. Gap should be | |
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| .13" to .15" | |
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| C) Bad ignitor electrode | C) | Replace ignitor electrode. See Ignitor, | |
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| page 9 | |
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| D) Bad spark transformer | D) | Replace spark transformer. See Spark | |
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| Transformer, page 9 | |
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Heater shuts down while running | 1. Propane supply may be inadequate |
2. High surrounding air temperature causing thermal limit device to shut down heater
3. Restricted air flow
1.A) Refill tank
B)Provide additional and/or larger tanks. See Propane Supply, page 5
2.This can happen when running heater in temperatures above 85°F. Run heater in cooler temperatures
3.Check heater inlet and outlet. Remove any obstructions
4.Damaged fan
5.Excessive dust or debris in surround- ing area
4. Replace fan. See Fan, page 8
Use only in areas free of high dust
content.
5. Clean heater. See Maintenance, page 7
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Version B - For Reduction | G016.J |
