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112127-01B
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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TROUBLESHOOTING
Note:
All troubleshooting items are listed in
order of operation.
WARNING: Turn off burner sys-
tem 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
pilot. This can damage pilot
unit.
POSSIBLE CAUSE
1. Ignitor electrode not connected to igni-
tor cable
2. Ignitor cable pinched or wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned wrong
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 mod-
els only)
6. Pilot is clogged
7. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Equipment shutoff valve not fully open
4. Control valve damaged
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tighten nut holding piezo ignitor. Nut
is located behind the mounting bracket.
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace pilot assembly
7. Replace pilot assembly
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
removed
5. Contact local propane/LP gas company
6. Clean pilot (see Cleaning and Mainte-
nance, page 22) or replace pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After pilot lights, keep control knob
pressed in 30 seconds
3. Fully open equipment shutoff valve
4. Replace control valve
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at pilot
When ignitor button is pressed, there is
spark at pilot but no ignition
Pilot lights but flame goes out when control
knob is released
Note:
For additional help, visit DESA’s
technical service web site at
www.desatech.com.
TROUBLESHOOTING