Desa SF20NT installation manual Troubleshooting, Observed Problem Possible Cause, Remedy

Models: SF20NT

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TROUBLESHOOTING

TROUBLESHOOTING

OBSERVED PROBLEM POSSIBLE CAUSE WARNING:Turnoffandunplugheaterandletcoolbeforeservicing. Only a qualified service person should service and repair heater.

REMEDY CAUTION: Never use a wire, needle or similar object to clean ODS/pilot. This can damage ODS/pilot unit.

Note: All troubleshooting items are listed in order of operation.

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

When ignitor button is pressed in, there is no spark at ODS/ pilot

1.Ignitor electrode positioned wrong

2.Ignitor electrode broken

3.Ignitor electrode not con- nected to ignitor cable

4.Ignitor cable pinched or wet

5.Broken ignitor cable

6.Bad piezo ignitor

7.Piezo ignitor nut is loose (piezo ignition models only)

8.Battery not installed, battery power low or battery not installed correctly (electronic ignition models only)

1.Replace pilot assembly

2.Replace pilot assembly

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 piezo

7.Tighten nut holding piezo ignitor. Nut is located inside heater cabinet at top

8.Install new alkaline battery in electronic ignitor. Verify battery is installed correctly

When ignitor button is pressed in, there is a spark at ODS/Pilot but no ignition

1.Gas supply turned off or equip- ment shutoff valve closed

2.Thermostat control knob not fully pressed in while pressing ignitor button

3.Air in gas lines when in- stalled

4.Depleted gas supply (propane/ LP gas)

5.ODS/pilot is clogged

6.Gas regulator setting is not correct

7.Thermostat control knob is not in pilot position

1.Turn on gas supply or open equipment shutoff valve

2.Turn to PILOT/IGN posi- tion. Fully press in thermostat control knob while pressing ignitor button

3.Continue holding down con- trol knob. Repeat igniting op- eration until air is removed

4.Contact local propane/LP gas company

5.Clean ODS/pilot (see Cleaning and Maintenance, page 15) or replace ODS/pilot assembly

6.Replace gas regulator

7.Turn thermostat control knob to pilot position

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Desa SF20NT installation manual Troubleshooting, Observed Problem Possible Cause, Remedy