OWNER’S MANUAL
TROUBLESHOOTING
Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.
Note: All troubleshooting items are listed in order of operation.
WARNING: Turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater.
CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
When ignitor button is pressed in, there is no | 1. | Ignitor electrode positioned wrong | 1. | Replace ignitor |
spark at ODS/pilot | 2. | Ignitor electrode broken | 2. | Replace ignitor |
| 3. | Ignitor electrode not connected to igni- | 3. | Reconnect ignitor cable |
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| tor cable |
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| 4. | Ignitor cable pinched or wet | 4. | Free ignitor cable if pinched by any |
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| metal or tubing. Keep ignitor cable dry |
| 5. | Broken ignitor cable | 5. | Replace ignitor cable |
| 6. | Bad piezo ignitor | 6. | Replace control valve (piezo is part of |
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| control valve) |
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ODS/pilot lights but flame goes out when | 1. | Gas supply turned off or equipment | 1. | Turn on gas supply or open equipment |
control knob is released |
| shutoff valve closed |
| shutoff valve |
| 2. | Control knob not fully pressed in while | 2. | Fully press in control knob while press- |
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| pressing ignitor button |
| ing ignitor button |
| 3. | Air in gas lines when installed | 3. | Continue holding down control knob. Re- |
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| peat igniting operation until air is removed |
| 4. | ODS/pilot is clogged | 4. | Clean ODS/pilot (see Cleaning and |
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| Maintenance, page 14 ) or replace ODS/ |
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| pilot assembly |
| 5. | Gas regulator setting is not correct | 5. | Replace gas regulator |
| 6. | Control knob not in pilot position | 6. | Turn control knob to pilot position |
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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 |
| 3. | Equipment shutoff valve not fully open | 3. | Fully open equipment shutoff valve |
| 4. | Thermocouple connection loose at con- | 4. | Hand tighten until snug, then tighten |
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| trol valve |
| 1/4 turn more |
| 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 14) 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 |
| 7. | Control valve damaged | 7. | Replace control valve |
www.desatech.com | Continued |
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