TROUBLESHOOTING
17
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 and unplug heater and let cool before servic- ing. 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 positioned wrong
2.Ignitor electrode broken
3.Ignitor electrode not connected to igni- tor cable
4.Ignitor cable pinched or wet
5.Broken ignitor cable
6.Bad ignitor
7.Battery not installed, battery power low, or battery not installed correctly (elec- tronic ignition models only)
1.Replace pilot assembly
2.Replace pilot assembly
3.Reconnect ignitor cable
4.Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry
5.Replace ignitor cable
6.Replace ignitor
7.Install new alkaline battery in elec- tronic ignitor. Verify battery is installed correctly
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.Depleted gas supply (propane/LP gas only)
6.ODS/pilot is clogged
7.Gas regulator setting is not correct
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. Re- peat igniting operation until air is removed
5.Contact local propane/LP gas company
6.Clean ODS/pilot (see Cleaning and Maintenance, page 15) or replace ODS/ pilot assembly
7.Replace gas regulator
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.Safety interlock system has been triggered
4.Equipment shutoff valve not fully open
5.Thermocouple connection loose at con- trol valve
6.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
7.Thermocouple damaged
8.Control valve damaged
1.Press in control knob fully
2.After ODS/pilot lights, keep control knob pressed in 30 seconds
3.Wait one minute for safety interlock sys- tem to reset. Repeat ignition operation
4.Fully open equipment shutoff valve
5.Hand tighten until snug, then tighten 1/4 turn more
6.A) Contact local natural or propane/LP gas company
B) Clean ODS/pilot (see Cleaning and Maintenance, page 15) or replace ODS/ pilot assembly
7.Replace pilot assembly
8.Replace control valve
For more
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