Troubleshooting
| LED Status | Control Status |
| Probable Cause | Service Procedure |
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| 1. Unstable pilot |
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| Six flashes, |
| 2. Pilot tube block or restricted | 1. See Burner Inspection |
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| one flash, | Failed to light pilot, |
| 3. Oxidation | on page 20 |
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| three second | system resets after |
| electrode |
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| pause (Soft | (5) minutes |
| 4. Wire damage to pilot | Testing and Replacement |
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| Lockout) |
| assembly or bad connection at | on page 22 |
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| gas valve |
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| 1. | Vent blockage or improper |
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| vent configuration | 1. Check vent or vent |
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| 2. | Pressure switch tubing kinked | tables |
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| Pressure switch or | or blocked |
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| Six flashes, | blower temperature | 3. | Faulty pressure switch | Testing on page 25 |
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| two flashes, | switch opened | 4. | Vent termination being | 4. Refer to venting section |
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| three second | during burner | affected by wind | of installation manual |
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| pause (Soft | operation. System | 5. | Blower not spinning up to | 5. See Blower Testing on |
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| Lockout) | resets after (5) | speed | page 28 |
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| minutes | 6. | Blower temperature or |
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| exhaust temperature too high | Temperature Switch |
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| 7. | Faulty blower temperature | Testing on page 31 |
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| switch |
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| 1. | Unstable pilot |
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| Six flashes, |
| 2. | Pilot tube block or restricted | 1. See Burner Inspection |
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| 3. | Oxidation | on page 20 |
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| three | Pilot flame |
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| flashes, | extinguished, |
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| 4. | Wire damage to pilot | Testing and Replacement |
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| three second | system auto resets |
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| pause (Soft | after (5) minutes | assembly or bad connection at | on page 22 |
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| gas control | 5. Refer to Installation & |
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| Lockout) |
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| 5. | Insufficient combustion air | Operation Manual |
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| 6. | Insufficient gas pressure |
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| Six flashes, | Undesired false |
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| four flashes, |
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| pilot flame sensed, | Pilot valve stuck in open position | Replace gas control |
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| three second |
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| pause | system auto resets |
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| 1. | Flammable vapor present |
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| Flammable vapor | 2. | Flammable vapor sensor |
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| Seven | sensor or | exposed to excessive moisture |
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| flashes, | resettable thermal | 3. | Flammable vapor sensor | See Flammable Vapor |
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| three second | switch fault | exposed to extreme ambient | Sensor Testing on page 40 |
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| pause | detected, see | temperature |
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| warning label | 4. | Resettable thermal switch |
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| open |
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| 1. | Flammable vapor sensor out |
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| Eight | Flammable vapor | of specification; verify Flammable |
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| flashes, one | Vapor Sensor (FVS) resistance is |
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| sensor out of | See Flammable Vapor |
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| flash, three | specification, | not below 25 k. | Sensor Testing on page 40 |
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| second | 2. | Possible short in flammable |
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| possible short |
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| pause | vapor sensor or resettable |
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| thermal switch wiring |
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Page 18
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