OWNER’S MANUAL
TROUBLESHOOTING
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| OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
| When ignitor button is pressed in, there is a | 1. | Control knob not fully pressed in | 1. | Press in control knob fully |
| spark at ODS/pilot but no ignition | 2. | Control knob not pressed in long enough | 2. | After ODS/pilot lights, keep control |
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| knob pressed in 30 seconds |
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| 3. | Equipment shutoff valve not fully open | 3. | Fully open equipment shutoff valve |
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| 4. | Thermocouple connection loose at con- | 4. | Hand tighten until snug, then tighten |
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| trol valve |
| 1/4 turn more |
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| 5. | Pilot flame not touching thermocouple, | 5. | A) Contact local natural gas company |
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| which allows thermocouple to cool, |
| B) Clean ODS/pilot (see Cleaning and |
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| causing pilot flame to go out. This prob- |
| Maintenance, page 13) or replace ODS/ |
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| lem could be caused by one or both of |
| pilot assembly |
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| the following: |
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| A) Low gas pressure |
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| B) Dirty or partially clogged ODS/pilot |
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| 6. | Thermocouple damaged | 6. | Replace thermocouple |
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| 7. | Control valve damaged | 7. | Replace control valve |
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| 8. | Safety interlock system has been trig- | 8. | Wait one minute for safety interlock sys- |
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| gered (thermostat models only) |
| tem to reset. Repeat ignition operation |
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| Burner(s) does not light after ODS/pilot is lit | 1. | Burner orifice(s) is clogged | 1. | Clean burner orifice(s) (see Cleaning |
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| and Maintenance, page 13) or replace |
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| burner orifice(s) |
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| 2. | Burner orifice(s) diameter is too small | 2. | Replace burner orifice(s) |
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| 3. | Inlet gas pressure is too low | 3. | Contact local natural gas company |
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| Delayed ignition of burner(s) | 1. | Manifold pressure is too low | 1. | Contact local natural gas company |
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| 2. | Burner orifice(s) is clogged | 2. | Clean burner orifice(s) (see Cleaning |
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| and Maintenance, page 13) or replace |
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| burner orifice(s) |
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| Burner backfiring during combustion | 1. | Burner orifice(s) is clogged or damaged | 1. | Clean burner orifice(s) (see Cleaning |
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| and Maintenance, page 13) or replace |
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| burner orifice(s) |
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| 2. | Burner damaged | 2. | Replace burner |
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| 3. | Gas regulator defective | 3. | Replace gas regulator |
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| Burner plaque(s) does not glow | 1. | Plaque damaged | 1. | Replace burner |
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| 2. | Inlet gas pressure is too low | 2. | Contact local natural gas company |
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| 3. | Control knob set between locked | 3. | Turn control knob until it locks at de- |
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| positions |
| sired setting |
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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 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
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
www.desatech.com
1.Turn heater off when using furniture polish, wax, carpet cleaners, or similar products
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