14
TROUBLESHOOTING
TROUBLESHOOTING
Note: For additional help, visit DESA Heating Products’ Technical Service web site at www.desatech.com.
Note: All troubleshooting items are listed in order of operation.
WARNING: Turn off heater and let cool before servicing. Only a qualified service 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, there is no spark at ODS/pilot
1. | Ignitor electrode not connected to igni- | 1. | Reconnect ignitor cable |
| 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. | Broken ignitor cable | 3. | Replace ignitor cable |
4. | Bad piezo ignitor | 4. | Replace piezo ignitor |
5. | Ignitor electrode broken | 5. | Replace pilot assembly |
6. | Ignitor electrode positioned wrong | 6. | Replace pilot assembly |
When ignitor button is pressed, there is spark at ODS/pilot but no ignition
1.Gas supply turned off or equipment shutoff valve closed
2.Control knob not in PILOT position
3.Control knob not pressed in while in PILOT position
4.Air in gas lines when installed
5.ODS/pilot is clogged
6.Gas regulator setting is not correct
7.Depleted gas supply (propane/LP only)
1.Turn on gas supply or open equipment shutoff valve
2.Turn control knob to PILOT position
3.Press in control knob while in PILOT position
4.Continue holding down control knob. Repeat igniting operation until air is re- moved
5.Clean ODS/pilot (see Cleaning and Maintenance, page 13) or replace ODS/ pilot assembly
6.Replace gas control
7.Contact local propane/LP gas company
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.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
5.Thermocouple connection loose at con- trol valve
6.Thermocouple damaged
7.Control valve damaged
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.A) Contact local natural or propane/LP gas company
B) Clean ODS/pilot (see Cleaning and Maintenance, page 13) or replace ODS/ pilot assembly
5.Hand tighten until snug, then tighten 1/4 turn more
6.Replace pilot assembly
7.Replace control valve
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