TROUBLESHOOTING
17
TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
Burner does not light after ODS/pilot is lit | 1. | Burner orifice is clogged | 1. | Clean burner orifice (see Cleaning and |
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| Maintenance, page 15) or replace burner |
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| orifice |
| 2. | Inlet gas pressure is too low | 2. | Contact local natural or propane/LP gas |
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| company |
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Delayed ignition of burner | 1. | Manifold pressure is too low | 1. | Contact local natural or propane/LP gas |
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| company |
| 2. | Burner orifice is clogged | 2. | Clean burner orifice (see Cleaning and |
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| Maintenance, page 15) 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 orifice (see Cleaning and |
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| Maintenance, page 15) or replace burner |
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| orifice |
| 2. | Burner damaged | 2. | Replace burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
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Burner plaque(s) does not glow (Infrared | 1. | Control knob set between locked positions | 1. | Turn control knob until it locks at de- |
models only) |
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| sired setting |
| 2. | Inlet gas pressure is too low | 2. | Contact local natural or propane/LP gas |
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| company |
| 3. | Plaque damaged | 3. | Replace burner |
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Yellow flame during burner combustion | 1. | Not enough air | 1. | Check burner for dirt and debris. If |
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| found, clean burner (see Cleaning and |
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| Maintenance, page 15) |
| 2. | Inlet gas pressure is too low | 2. | Contact local natural or propane/LP gas |
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| company |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
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Slight smoke or odor during initial operation | 1. | Residues from manufacturing processes | 1. | Problem will stop after a few hours of |
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| operation |
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Heater produces a whistling noise when | 1. | Turning control knob to HIGH position | 1. | Turn control knob to LOW position and |
burner is lit |
| when burner is cold |
| let warm up for a minute |
| 2. | Air in gas line | 2. | Operate burner until air is removed from |
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| line. Have gas checked by local natural |
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| or propane/LP gas company |
| 3. | Air passageways on heater blocked | 3. | Observe minimum installation clear- |
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| ances (see Figure 4, page 7) |
| 4. | Dirty or partially clogged burner orifice | 4. | Clean burner (see Cleaning and Mainte- |
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| nance, page 15) or replace burner orifice |
Heater produces a clicking/ticking noise just after burner is lit or shut off
1.Metal expanding while heating or con- tracting while cooling
1.This is common with most heaters. If noise is excessive, contact qualified ser- vice person
For more information, visit www.desatech.com
