21 | TROUBLESHOOTING |
Manual Ignition System | |
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TROUBLESHOOTING
Manual Ignition System
Note: For additional help, visit DESA’s technical service web site at www. desatech.com
Note: All troubleshooting items arelistedin order of operation.
WARNING: Turn off heater and | CAUTION Never use a wire, |
let cool before servicing.Only a quali- | needle, or similar object to |
fied service person should service | clean pilot. This can damage |
and repair heater. | pilot unit. |
The two most common causes of a malfunctioning gas appliance are:
1.Loose wiring connections
2.Construction debris clogging the pilot and/or gas control valve filter
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
When ignitor button is pressed, there is no | 1. | Ignitor electrode not connected to igni- | 1. | Reconnect ignitor cable |
spark at pilot |
| tor cable |
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| 2. | Ignitor cable pinched or wet | 2. | Free ignitor cable if pinched by any |
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| metal or tubing. Keep ignitor cable dry |
| 3. | Piezo ignitor nut is loose | 3. | Tighten nut holding piezo ignitor. Nut |
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| is located behind the mounting bracket |
| 4. | Broken ignitor cable | 4. | Replace ignitor cable |
| 5. | Bad piezo ignitor | 5. | Replace piezo ignitor |
| 6. | Ignitor electrode broken | 6. | Replace pilot assembly |
| 7. | Ignitor electrode positioned wrong | 7. | Replace pilot assembly |
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When ignitor button is pressed, there is | 1. | Gas supply turned off or equipment | 1. | Turn on gas supply or open equipment |
spark at pilot but no ignition |
| shutoff valve closed |
| shutoff valve |
| 2. | Gas control knob not in PILOT position | 2. | Turn gas control knob to PILOT position |
| 3. | Gas control knob not pressed in while | 3. | Press in gas control knob while in PILOT |
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| in PILOT position |
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| 4. | Air in gas lines when installed | 4. | Continue holding down control knob. |
| 5. | Depletedgassupply(propane/LPmodels | 5. | Contact local propane/LP gas company |
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| only) |
| Clean pilot (see Cleaning and Mainte- |
| 6. | Pilot is clogged | 6. | |
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| nance,page20)orreplacepilotassembly |
| 7. | Gas regulator setting is not correct | 7. | Replace gas control |
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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 |
knob is released | 2. | Gas control knob not pressed in long | 2. | After pilot lights, keep gas control knob |
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| enough |
| pressed in 30 seconds |
| 3. | Equipment shutoff valve not fully open | 3. | Fully open equipment shutoff valve |
| 4. | Pilot flame not touching thermocouple, | 4. | A) Contact local natural or propane/LP |
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| which alows thermocouple to cool, |
| gas company |
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| causing pilot to go out. This prob- |
| B) Clean pilot (see Cleaning and |
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| lem could be caused by one or more of |
| Maintenance, page 20) or replace pi- |
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| lot assembly |
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| A) Low gas pressure |
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| B) Dirty or partially clogged pilot |
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| 5. | Thermocouple connection loose at con- | 5. | Hand tighten until snug, then tighten |
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| trol valve. |
| 1/4 turn more |
| 6. | Thermocouple damaged | 6. | Replace pilot assembly |
| 7. | Control valve damaged | 7. | Replace control valve |
www.desatech.com |