100,000 Btu/Hr
PROPANE CONSTRUCTION HEATER
TROUBLESHOOTING
Note: For additional help, visit DESA International’s Technical Service web site at www.desatech.com.
WARNING: Never service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur.
OBSERVED FAULT | POSSIBLE CAUSE | REMEDY | ||
Fan does not turn when heater is | 1. | No electrical power to heater | 1. | Check voltage to electrical outlet. If voltage is |
plugged in. |
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| good, check heater power cord for breaks. |
| 2. | Fan hitting inside of heater shell | 2. | Adjust motor/fan mount to keep fan from hitting |
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| inside of heater shell. Bend fan mount if necessary. |
| 3. | Fan blades bent | 3. | Replace fan. See Fan, page 7. |
| 4. | Defective motor | 4. | Replace motor. See Motor, page 7. |
Heater will not ignite | 1. User did not follow installation or |
| operation instructions properly |
| 2. No spark at ignitor. To test for spark, |
| follow step 8 under Ignitor, page 8. If |
| you see spark at ignitor, have heater |
| serviced by qualified service person. |
| If no spark seen: |
| A) Loose or disconnected ignitor wire |
| B) Wrong spark gap |
| C) Bad ignitor electrode |
| D) Bad spark transformer |
1.Repeat installation and operation instructions. See Installation, page 4 and Operation, page 5.
2.A) Check ignitor wire. Tighten or reattach loose ignitor wire. See Figure 10, page 8 for ignitor wire location.
B)Set gap between ignitor electrode and target plate to .13"/.15".
C)Replace ignitor electrode. See Ignitor, page 8.
D)Replace spark transformer. See Spark Transformer, page 8.
Heater shuts down while running. | 1. | Propane supply may be inadequate | 1. | A) Refill tank. |
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| B) Provide additional and/or larger tanks. See |
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| Propane Supply, page 4. |
| 2. | High surrounding air temperature | 2. | This can happen when running heater in |
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| causing thermal limit device to shut |
| temperatures above 85°F. Run heater in cooler |
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| down heater. |
| temperatures. |
| 3. | Restricted air flow | 3. | Check heater inlet and outlet. Remove any |
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| obstructions. |
| 4. | Damaged fan | 4. | Replace fan. See Fan, page 7. |
| 5. | Excessive dust or debris in surrounding | 5. | Clean heater. See Maintenance, page 5. |
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| WARNING: Use only in areas free of |
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| high dust content. |
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www.desatech.com
6 | 105342 |
