OWNER’S MANUAL

TROUBLESHOOTING

Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.

Note: Before troubleshooting the system, make sure the equipment shutoff valve is ON.

WARNING: Turn off fireplace and let cool before servicing. Only a qualified service person should service and repair fireplace.

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

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

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Pilot will not light

1.

No gas supply, or shutoff valve is OFF

1.

Check to see if you have gas supply

 

2.

Air in gas line

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.

Construction debris clogging pilot orifice

3.

Remove debris and dirt, inspect and clean

 

 

 

 

any other possible obstructions

 

4.

Low gas pressure

4.

Contact your gas supplier

 

5.

Control valve knob is not on the PILOT

5.

Refer to section on pilot lighting

 

 

position

 

 

 

6.

Kinked pilot line

6.

Have a qualified technician replace pilot

 

 

 

 

line

 

7.

Bad valve

7.

Replace control valve (see Replacement

 

 

 

 

Parts, page 26)

 

8.

Bad thermocouple or loose connection

8.

Tighten thermocouple or replace

 

 

 

 

 

No gas to burner, although wall switch and

1.

Wall switch wires defective

1.

Check electrical connections

valve are set to the ON position

 

 

 

 

 

 

 

 

 

Frequent pilot outage

1. Pilot flame may be too low, causing

 

safety pilot to “drop out”

1.Clean and adjust pilot flame for maximum flame impingement on thermopile

Burner goes off after a short time

1.

Venting recirculation problem

1.

Have a qualified technician check vent-

 

 

 

 

ing system for leaks or obstructions.

 

 

 

 

Have a qualified technician measure the

 

 

 

 

pilot’s millivoltage

 

 

 

 

 

When ignitor button is pressed, there is no

1.

Ignitor electrode not connected to igni-

1.

Reconnect ignitor cable

spark at pilot

 

tor cable

 

 

 

2.

Ignitor cable pinched or wet

2.

Free ignitor cable if pinched by any metal

 

 

 

 

or tubing. Keep ignitor cable dry

 

3.

Piezo ignitor nut is loose

3.

Tighten nut holding piezo ignitor. Nut is

 

 

 

 

located behind the mounting bracket

 

4.

Broken ignitor cable

4.

Replace ignitor cable

 

5.

Bad piezo ignitor

5.

Replace piezo ignitor

 

6.

Ignitor electrode broken

6.

Replace pilot assembly

 

7.

Ignitor electrode positioned wrong

7.

Replace pilot assembly

 

 

 

 

 

Remote does not function

1. Battery is not installed. Battery power

 

is low

1.Replace 9-volt batteries in receiver and remote control

www.desatech.com

Continued

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Desa MDVFST installation manual Troubleshooting, Observed Problem Possible Cause Remedy

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