Desa VDVF36PN/PP User Manual download pdf (Page 25)

105706-01B

For more information, visit www.desatech.com

TROUBLESHOOTING

OBSERVED PROBLEM

Pilot will not light

No gas to burner, although wall switch and

valve are set to the ON position

Frequent pilot outage

Burner goes off after a short time

When ignitor button is pressed, there is no

spark at pilot

POSSIBLE CAUSE

1. No gas supply, or shutoff valve is OFF

2. Air in gas line

3. Construction debris clogging pilot orifice

4. Low gas pressure

5. Control valve knob is not on the PILOT

position

6. Kinked pilot line

7. Bad valve

8. Bad thermocouple or loose connection

1. Wall switch wires defective

1. Pilot flame may be too low, causing

safety pilot to “drop out”

1. Venting recirculation problem

1. Ignitor electrode not connected to igni-

tor cable

2. Ignitor cable pinched or wet

3. Piezo ignitor nut is loose

4. Broken ignitor cable

5. Bad piezo ignitor

6. Ignitor electrode broken

7. Ignitor electrode positioned wrong

REMEDY

1. Check to see if you have gas supply

2. Hold control valve in the PILOT position

for 2 to 3 minutes to purge air. If you smell

gas stop and wait for a few minutes before

trying to light the fireplace

3. Remove debris and dirt, inspect and

clean any other possible obstructions

4. Contact your gas supplier

5. Refer to section on pilot lighting

6. Have a qualified technician replace pi-

lot line

7. Replace control valve (see Replacement

Parts, page 24)

8. Tighten thermocouple or replace

1. Check electrical connections

1. Clean and adjust pilot flame for maximum

flame impingement on thermopile

1. Have a qualified technician check vent-

ing system for leaks or obstructions.

Have a qualified technician measure the

pilot’s millivoltage

1. Reconnect ignitor cable

2. Free ignitor cable if pinched by any

metal or tubing. Keep ignitor cable dry

3. Tighten nut holding piezo ignitor. Nut

is located behind the mounting bracket

4. Replace ignitor cable

5. Replace piezo ignitor

6. Replace pilot assembly

7. Replace pilot assembly

Note:

For additional help, visit DESA International’s

Technical Service web site at www.desatech.com.

Note:

Before troubleshooting the system, make sure the

gas shutoff valve is ON.

Note:

All troubleshooting items are listed in order of

operation.

WARNING: Turn off heater and let cool before servic-

ing. Only a qualified service person should service and

repair heater.

CAUTION: Never use a wire, needle, or similar object to

clean pilot. This can damage pilot unit.

TROUBLESHOOTING

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Desa VDVF36PN/PP User Manual Page 25

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