TROUBLESHOOTING
Continued
| OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY |
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| Pilot lights but flame goes out when control | 1. | Gas control knob not fully pressed in | 1. | Press in gas control knob fully |
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| knob is released | 2. | Gas control knob not pressed in long | 2. | After pilot lights, keep gas control knob |
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| 3. | enough | 3. | pressed in 30 seconds |
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| Equipment shutoff valve not fully open | Fully open equipment shutoff valve |
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| 4. | Pilot flame not touching thermocouple, | 4. | A) Contact local natural or propane/LP |
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| which allows thermocouple to cool, |
| gas company |
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| causing pilot flame to go out. This prob- |
| B) Clean pilot (see Cleaning and Main- |
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| lem could be caused by one or both of |
| tenance, page 24) or replace pilot as- |
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| the following: |
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| A) Low gas pressure |
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| 5. | B) Dirty or partially clogged pilot | 5. | Hand tighten until snug, then tighten 1/4 |
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| Thermocouple connection loose at con- |
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| 6. | trol valve | 6. | turn more |
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| Thermocouple damaged | Replace pilot assembly |
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| 7. | Control valve damaged | 7. | Replace control valve |
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| Burner does not light after pilot is lit | 1. | Burner orifice clogged | 1. | Clean burner (see Cleaning and Main |
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| tenance, page 24) or replace burner |
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| 2. | Inlet gas pressure is too low | 2. | orifice |
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| Contact local propane/LP or natural gas |
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| 3. | Thermopile leads disconnected or im- | 3. | company |
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| Reconnect leads |
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| 4. | properly connected | 4. | Replace thermopile |
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| Thermopile is defective |
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| Delayed ignition burner | 1. | Manifold pressure is too low | 1. | Contact local propane/LP or natural gas |
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| 2. | Burner porting or orifice clogged | 2. | company |
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| Clean burner (see Cleaning and Main- |
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| tenance, page 24) or replace burner |
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| orifice |
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| Burner backfiring during combustion | 1. | Burner orifice is clogged or damaged | 1. | Clean burner (see Cleaning and Main- |
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| tenance, page 24) or replace burner |
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| 2. | Damaged burner | 2. | orifice |
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| Replace damaged burner |
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| 3. | Gas regulator defective | 3. | Replace gas control |
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| Slight smoke or odor during initial | 1. | Residues from manufacturing processes | 1. | Problem will stop after a few hours of |
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| operation |
| and logs curing |
| operation |
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| Heater produces a whistling noise when | 1. | Turning gas control knob to HI position | 1. | Turn gas control knob to LO position |
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| burner is lit | 2. | when burner is cold | 2. | and let warm up for a minute |
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| Air in gas line | Operate burner until air is removed from |
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| line. Have gas line checked by local |
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| 3. | Dirty or partially clogged burner orifice | 3. | propane/LP or natural gas company |
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| Clean burner (see Cleaning and Main- |
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| tenance, page 24) or replace burner |
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| orifice |
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| Glass soots | 1. | Flame impingement on logs | 1. | Adjust the log set so that the flame does |
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| 2. | Debris around burner air mixer | 2. | not excessively impinge on it |
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| Inspect the opening at the base of the |
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| burner to see that it is NOT packed with |
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| any type of material |
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26 | www.desatech.com |
