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VFI33 Vent Free Gas Fireplace System
Turn appliance OFF and allow to cool before servicing. Only a qualified service person should
service and repair the heater.
NOTE: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/pilot.
Appliance produces unwanted
odors.
Appliance shuts off during use. 1. Not enough fresh air is available for
Gas odor even when control
knob is in OFF position.
When ignitor button is pressed,
there is spark at ODS pilot, but
no ignition.
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode not connected to
ignitor cable.
4. Ignitor cable pinched or wet. Keep
ignitor cable dry.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1. Appliance burning vapors from paint,
hair spray, glues, etc.
2. Gas leak.
3. Initial burn off.
ODS/ pilot to operate.
2. Low line pressure.
3. ODS/pilot is partially clogged.
4. Defective Thermopile.
5. Restrictions in incoming air flow
1. Gas leak.
2. Control valve defective.
1. Gas supply turned off or manual
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.
Monessen • VFI33 Owner Manual • 20307670 • Rev H • 1/2020
WARNING!
SOLUTION
1 Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by any metal or
tubing.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Ventilate room. Stop using odor causing prod-
ucts while heater is running.
2. Locate and correct all leaks.
3. Ventilate room and turn unit on high until odor
is gone. Odor should be gone after 6 hours of
continuous use.
1. Open window and/or door for ventilation.
2. Contact local gas company.
3. Clean ODS/pilot.
4. Check pilot flame, check wire connections, check
output, should be 325 millivolts across TH/TP and
TP Terminals with ON/OFF switches off.
5. Check for bottom riser on glass door, sunken
fireplace, excessive lava rock/cinders densely
packed against grate.
1. Locate and correct all leaks.
2. Replace control valve.
1. Turn on gas supply or open manual 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. Replace ODS/pilot assembly or get it serviced.
6. Replace gas regulator.
TROUBLESHOOTING
37
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