Troubleshooting - Vanguard VP1600TB Owner's Operation And Installation Manual

INFRARED PROPANE/LP GAS HEATER

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.
OBSERVED PROBLEM
When ignitor button is pressed in, there is no
spark at ODS/pilot
When ignitor button is pressed in, there is a
spark at ODS/Pilot but no ignition
®
WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice person should service and
repair heater.
POSSIBLE CAUSE
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 piezo ignitor
7. Piezo ignitor nut is loose
1. Gas supply turned off or manual shutoff
valve closed
2. Control knob not pressed in while press-
ing ignitor button (non-thermostat mod-
els only)
Thermostat control knob not pressed in
(thermostat models only)
3. Air in gas lines when installed
4. Depleted gas supply
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
7. Thermostat control knob is not in pilot
position (thermostat models only)
www.desatech.com
14
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot. This can damage ODS/
pilot unit.
REMEDY
1. Replace ignitor
2. Replace ignitor
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 control valve (piezo is part of
control valve)
7. Tighten nut holding piezo ignitor. Nut
is located inside heater cabinet at top
1. Turn on gas supply or open manual
shutoff valve
2. Press in control knob while pressing ig-
nitor button (non-thermostat models
only)
Press in thermostat control knob while
turning to PILOT/IGN position (thermo-
stat models only)
3. Continue holding down control knob
Repeat igniting operation until air is re-
moved
4. Contact local propane/LP gas company.
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 13) or replace ODS/
pilot assembly
6. Replace gas regulator
7. Turn thermostat control knob to pilot
position
104821