TROUBLESHOOTING

 

WARNING

 

WARNING

 

 

 

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

POSSIBLE CAUSE

REMEDY

When ignitor button is

1.

Ignitor electrode positioned wrong.

1

Replace ignitor.

pressed, there is no spark at

 

 

 

 

ODS/pilot.

 

 

 

 

2.

Ignitor electrode is broken.

2.

Replace ignitor.

 

 

 

 

 

 

 

3.

Ignitor electrode not connected to ignitor

3.

Reconnect ignitor cable.

 

 

cable.

 

 

 

 

 

 

 

 

4.

Ignitor cable pinched or wet. Keep ignitor

4.

Free ignitor cable if pinched by any metal or

 

 

cable dry.

 

tubing.

 

 

 

 

 

 

5.

Broken ignitor cable.

5.

Replace ignitor cable.

 

6.

Bad piezo ignitor.

6.

Replace piezo ignitor.

Appliance produces

1. Appliance burning vapors from paint, hair

1.

Ventilate room. Stop using odor causing

unwanted odors.

 

spray, glues, etc.

 

products while heater is running.

 

 

 

 

 

 

2.

Gas leak.

2.

Locate and correct all leaks.

 

3.

Initial burn off

3.

Ventilate room and turn unit on high until odor

 

 

 

 

is gone. Odor should be gone after 6 hours of

 

 

 

 

continuous use.

Appliance shuts off during

1. Not enough fresh air is available for ODS/

1.

Open window and/or door for ventilation.

use.

 

pilot to operate.

 

 

 

 

 

 

 

 

2.

Low line pressure.

2.

Contact local gas company.

 

 

 

 

 

 

3.

ODS/pilot is partially clogged.

3.

Clean ODS/pilot.

 

4.

Defective Thermopile.

4.

Check wire connections. Check output should

 

 

 

 

be 500 Millivolts across TH/TP and TP Terminals

 

 

 

 

with ON/OFF switches off.

 

 

 

 

 

 

5.

Restrictions in incoming air flow.

5.

Check for bottom riser on glass door, sunken

 

 

 

 

fireplace, excessive lava rock/cinders densely

 

 

 

 

packed against grate.

Gas odor even when control

1. Gas leak.

1.

Locate and correct all leaks.

knob is in OFF position.

2.

Control valve defective.

2.

Replace control valve.

 

When ignitor button is

1. Gas supply turned off or manual shutoff

1.

Turn on gas supply or open manual shutoff

pressed, there is spark at

 

valve closed.

 

valve.

ODS pilot, but no ignition.

 

 

 

 

2.

Control knob not in PILOT position.

2.

Turn control knob to PILOT position.

 

 

3.

Control knob not pressed in while in PILOT

3.

Press in control knob while in PILOT position.

 

 

position.

 

 

 

 

 

 

 

 

4.

Air in gas lines when installed.

4.

Continue holding down control knob. Repeat

 

 

 

 

igniting operation until air is removed.

 

 

 

 

 

 

5.

ODS/pilot is clogged.

5.

Replace ODS/pilot assembly or get it serviced.

 

6.

Gas regulator setting is not correct.

6.

Check incoming pressure. Replace gas

 

 

 

 

regulator.

81D0107

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Monessen Hearth NB18, NB24 operating instructions Troubleshooting, Observed Problem Possible Cause Remedy