®

DIRECT-VENT FIREPLACE

TROUBLESHOOTING

Continued

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 pi-

 

 

 

 

lot line

 

7.

Bad valve

7.

Replace control valve (see Replacement

 

 

 

 

Parts, page 35)

 

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

 

 

 

 

 

Burner does not light after pilot is lit

1.

Burner orifice clogged

1.

Clean burner (see Cleaning and

 

 

 

 

Maintenance, page 28) or replace burner

 

 

 

 

orifice

 

2.

Inlet gas pressure is too low

2.

Contact local propane/LP or natural gas

 

 

 

 

company

 

3.

Thermopile leads disconnected or im-

3.

Reconnect leads (see Wiring Diagram,

 

 

properly connected

 

page 35)

 

4.

Thermopile is defective

4.

Replace thermopile

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Vanguard Managed Solutions MBDV37, MBDV41 Trying to light the fireplace, Parts, Pilot’s millivoltage, Orifice, Company