Troubleshooting - MHSC MJ27NR Installation And Operating Istructions

Note: All troubleshooting items are listed in order of operation.
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.
pressed, there is spark at
ODS pilot, but no ignition.
86D0024
Turn appliance OFF and allow to cool before
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.
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.

TROUBLESHOOTING

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 6
hours of continuous use.
1. Open window and/or door for ventilation.
2. Contact local gas company.
3. Clean ODS/pilot.
4. Check wire connections. Check output
should be 500 Millivolts across TH/TP and
TP Terminals with ON/OFF switches off.
5. Check for bottom riser on glass door,
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. Check incoming pressure. Replace gas
regulator.
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