OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY |
ODS/pilot lights but flame goes out when control knob is released
1.Control knob not fully pressed in
2.Control knob not pressed in long enough
3.Equipment shutoff valve not fully open
4.Thermocouple connection loose at con- trol valve
5.Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out. This prob- lem could be caused by one or both of the following:
A)Low gas pressure
B)Dirty or partially clogged ODS/pilot
6.Thermocouple damaged
7.Control valve damaged
8.Safety interlock system has been trig- gered (thermostat models only)
1.Press in control knob fully
2.After ODS/pilot lights, keep control knob pressed in 30 seconds
3.Fully open equipment shutoff valve
4.Hand tighten until snug, then tighten 1/4 turn more
5.A) Contact local propane/LP gas company B) Clean ODS/pilot (see Cleaning and Maintenance, page 13) or replace ODS/ pilot assembly
6.Replace thermocouple
7.Replace control valve
8.Wait one minute for safety interlock sys- tem to reset. Repeat ignition operation
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) |
| 2. | Burner orifice(s) diameter is too small | 2. | Replace burner orifice(s) |
| 3. | Inlet gas pressure is too low | 3. | Contact local propane/LP gas company |
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Delayed ignition of burner(s) | 1. | Manifold pressure is too low | 1. | Contact local propane/LP gas company |
| 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) |
| 2. | Burner damaged | 2. | Replace burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
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Burner plaque(s) does not glow | 1. | Plaque damaged | 1. | Replace burner |
| 2. | Inlet gas pressure is too low | 2. | Contact local propane/LP gas company |
| 3. | Control knob set between locked posi- | 3. | Turn control knob until it locks at de- |
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| 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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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 cleaner, etc., turn into white powder residue
www.desatech.com
1.Turn heater off when using furniture polish, wax, carpet cleaners, or simi- lar products
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