TROUBLE SHOOTING CHART
SYMPTOM | POSSIBLE CAUSES |
| CORRECTIVE ACTION | ||
Flame too large | 1. Defective operator section of valve. | 1. Replace valve. | |||
| 2. | Burner orifice too large. | 2. Check with local gas company for proper | ||
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| orifice size and replace. | |
| 3. | If installed above 2,000 ft. | 3. See burne orifice section, Page 12. | ||
Yellow burner flame | 1. Clogged burner ports. | 1. | Remove burners and check for | ||
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| obstructions in throats, ports, and | |
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| orifices. Clean - but do not enlarge ports | |
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| or orifices. | |
| 2. | Obstruction around vent cap. | 2. | Make sure area around vent cap is clear, | |
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| be sure vent system is sealed. | |
Gas odor | 1. Gas leak. | 1. | See Page 1. | ||
Delayed Ignition | 1. Low gas pressure. | 1. | Check gas supply pressure. | ||
| 2. | Igniter not properly located. | 2. | Check ignitor location and correct if | |
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| necessary. | |
Failure to ignite | 1. Main gas off. | 1. | Open all manual gas valves. | ||
| 2. | Thermostat not set high enough to call | 2. | Set thermostat to higher temperature. | |
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| for heat. |
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| 3. | Clogged burner orifice. | 3. Clean burner orifice (do not enlarge). | ||
| 4. | Incorrect wiring. | 4. | Check wiring diagram. | |
| 5. | Defective valve. | 5. | Replace valve. | |
| 6. | No power to unit. | 6. | Check power supply. | |
| 7. | Defective pressure switch. | 7. | Replace pressure switch. | |
Burner won’t turn off | 1. Defective or damaged thermostat wire, | 1. | Cean be checked by removing wire from | ||
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| or thermostat. |
| control board terminal. If burner goes off, | |
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| replace thermostat. | |
| 2. | Thermostat location. | 2. | ||
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| cold spots. | |
| 3. | Defective or sticking valve. | 3. Replace valve. | ||
| 4. | Excessive gas pressure. | 4. | Contact utility supplying gas. | |
| 5. | Defective or damaged thermostat. | 5. | Replace thermostat. | |
Incorrect gas input | 1. Gas input not checked. | 1. | |||
| 2. | Clogged orifice. | 2. Clean orifices with a smooth wood | ||
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| toothpick, do not enlarge. | |
Not enough heat | 1. Furnace undersized. | 1. | This is especially true when a dwelling | ||
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| or room is enlarged. Have the heat loss | |
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| calculated and compare to furnace | |
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| output. Your gas company can supply | |
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| you with this information. If furnace is | |
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| undersized, replace with correct size unit, | |
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| or add up to two more heaters. | |
| 2. | Temperature dial set too low. | 2. | Raise temperature setting. | |
| 3. | Incorrect supply pressure. | 3. | Check supply pressure. | |
Too much heat | 1. Temperature dial set too high. | 1. | Lower temperature setting. | ||
| 2. | Combination control valve stuck open. | 2. | Replace combination control valve. | |
Main burner goes out | 1. Defective flame sensor. | 1. Check voltage and replace if low. | |||
during normal operation | 2. | Input too high. | 2. | Check input rate. | |
| 3. | Cover around pilot lighter hole not air | 3. | Tighten screws securing sight glass. | |
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| tight. |
| Check and replace gasket if needed. | |
| 4. | Vent tubes not properly installed or | 4. | Follow instructions. Check both | |
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| sealed. |
| exhaust and air intake tubes, and vent | |
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| cap. Be sure all gaskets are in place and | |
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| properly sealed. Use only tubes and | |
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| vent cap supplied. Do not alter vent | |
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| tubes or cap. Check wall thickness and | |
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| tube lengths. | |
| 5. | Limit switch opens. | 5. Check rate - remove any obstructions to | ||
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| circulating air. | |
| 6. | Exhaust or air intake tubes blocked. | 6. | Remove obstruction. Check for snow. | |
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Page 21