Monessen Hearth DLX18, Installation And Operating Instructions Manual, Page: 34 / 36

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OBSERVED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/pilot.
Appliance produces unwanted
odors.
Appliance shuts off during use.
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.
1. Not enough fresh air is available for 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.
REMEDY
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
products 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
2 to 3 hours of continuous use.
1. Open window and/or door for venti-
lation.
2. Contact local gas company.
3. Clean ODS/pilot.
4. Check pilot flame, check wire connec-
tions, check output, should be 325 mil-
livolts across TH/TP and TP Terminals
with ON/OFF switches off.
5. Check for bottom riser on glass door,
sunken fireplace, excess lava rock/cinders
densely packed against the grate.
1. Locate and correct all leaks.
2. Replace control valve.
1. Turn on gas supply or open manual shut-
off 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.
Note: All troubleshooting items are listed in order of operation.
TROUBLESHOOTING
Turn appliance OFF and allow to cool
before servicing. Only a qualified
service person should service and
repair the heater.
W
ARNING