Troubleshooting
WARNING: Turn off heater, disconnect power if applicable and let cool before servicing. Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle, or similar object to clean pilot. This can damage pilot unit.
Note: The two most common causes of malfunctioning gas appliances are loose wiring connections and construction debris clogging pilot and/or control valve filter.
Note: Before troubleshooting the system make sure gas shut off valve is open.
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| Millivolt system |
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PROBLEM | POSSIBLE CAUSE | REMEDY | |||
Pilot will not light | 1. | No gas supply, or shutoff valve | 1. | Check gas supply |
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| 2. | is OFF | 2. | Hold control valve in the | |
| Air in gas line | ||||
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| PILOT position for 2 to 3 | |
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| minutes to purge air. If you | |
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| smell gas stop and wait a few | |
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| minutes before trying to light | |
| 3. | Construction debris clogging | 3. | fireplace | |
| Remove debris and dirt, in- | ||||
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| pilot orifice |
| spect and clean any other | |
| 4. | Low gas pressure | 4. | possible obstructions | |
| Contact your gas supplier | ||||
| 5. | Control valve knob is not on | 5. | Refer to section on pilot | |
| 6. | the PILOT position | 6. | lighting | |
| Kinked pilot line | Have a qualified technician | |||
| 7. | Bad valve | 7. | replace pilot line | |
| Replace control valve | ||||
| 8. | Bad thermocouple or loose | 8. | Tighten thermocouple or re- | |
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| connection |
| place |
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Pilot will not stay lit | 1. | Loose wiring on thermopile to | 1. | Check wiring connection. Refer | |
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| regulator valve. No millivolt |
| to Wiring Diagrams, page 31 | |
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| current being sent to regulator |
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No gas to burner, although wall | 1. | Wall switch wires defective | 1. | Check electrical connections | |
switch and valve are set to the | 2. | Thermopile generator or sensor | 2. | ||
ON position |
| not generating sufficient voltage |
| Not Stay Lit" |
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Frequent pilot outage | 1. | Pilot flame may be too low, | 1. | Clean and adjust pilot flame for | |
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| causing safety pilot to “drop |
| maximum flame impingement | |
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| out” |
| on thermopile |
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Pilot goes out when wall switch | 1. | Millivolt output on thermopile | 1. | Replace thermopile | |
is on |
| too high |
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