FIREPLACE MANUFACTURERS INC.
UNVENTED PROPANE/LP GAS LOG HEATER
TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
One or both burners do not light after ODS/ | 1. | Inlet gas pressure is too low | 1. | Contact local propane/LP gas company |
pilot is lit | 2. | Burner orifice(s) clogged | 2. | Clean burner(s) (see Cleaning and Main- |
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| tenance, page 16) or replace burner |
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| orifice(s) |
| 3. | Mislocated crossover tube | 3. | Contact qualified service person |
| 4. | Burner orifice(s) diameter is too small | 4. | Replace burner orifice(s) |
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Delayed ignition of one or both burners | 1. | Manifold pressure is too low | 1. | Contact local propane/LP gas company |
| 2. | Burner orifice(s) clogged | 2. | Clean burner(s) (see Cleaning and Main- |
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| tenance, page 16) or replace burner |
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| orifice(s) |
| 3. | Mislocated crossover tube | 3. | Contact qualified service person |
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Burner backfiring during combustion | 1. | Burner orifice is clogged or damaged | 1. | Clean burner (see Cleaning and Mainte- |
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| nance, page 16) or replace burner orifice |
| 2. | Damaged burner | 2. | Replace damaged burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
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Yellow flame in front burner during burner | 1. | Not enough air | 1. | Check burner(s) for dirt and debris. If |
combustion |
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| found, clean burner(s) (see Cleaning and |
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| Maintenance, page 16) |
| 2. | Gas regulator defective | 2. | Replace gas regulator |
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Slight smoke or odor during initial operation 1. Residues from manufacturing processes and logs curing
1.Problem will stop after a few hours of operation
Heater produces a whistling noise when 1. | Turning control knob to HI position | 1. | Turn control knob to LO position and |
burners are lit | when burners are cold |
| let warm up for a minute |
2. | Air in gas line | 2. | Operate burners until air is removed |
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| from line. Have gas line checked by lo- |
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| cal propane/LP gas company |
3. | Air passageways on heater blocked | 3. | Observe minimum installation clear- |
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| ances (see pages 7 through 9) |
4. | Dirty or partially clogged burner | 4. | Clean burners (see Cleaning and Main- |
| orifice(s) |
| tenance, page 16) or replace burner |
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| orifice(s) |
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White powder residue forming within burner box or on adjacent walls or furniture
1.When heated, vapors from furniture pol- ish, wax, carpet cleaners, etc. turn into white powder residue
1.Turn heater off when using furniture polish, wax, carpet cleaners, or similar products
Moisture/condensation noticed on windows 1. Not enough combustion/ventilation air | 1. Refer to Air for Combustion and Venti- |
| lation requirements (page 4) |
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