Desa (F)SVYD18NR installation manual Observed Problem Possible Cause Remedy

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Delayed ignition burner

1.

Manifold pressure is too low

1.

Contact local natural gas company

2.

Burner orifice clogged

2.

Clean burner (see Cleaning and Mainte-

nance, page 18) or replace burner orifice

Burner backfiring during combustion

1.

Burner orifice is clogged or damaged

1.

Clean burner (see Cleaning and Mainte-

nance, page 18) or replace burner orifice

2.

Damaged burner

2.

Replace damaged burner

3.

Gas regulator defective

3.

Replace gas control

Slight smoke or odor during initial operation

1.

Not enough air

1.

Check burner for dirt and debris. If

found, clean burner (see Cleaning and

Maintenance, page 18)

2.

Gas regulator defective

2.

Replace gas control

3.

Residues from manufacturing processes

3.

Problem will stop after a few hours of

and logs curing

operation

Moisture/condensation noticed on windows

1.

Not enough combustion/ventilation air

1.

Refer to Air for Combustion and Venti-

lation requirements (page 4)

Heater produces a whistling noise when

1.

Turning control knob to HI position

1.

Turn control knob to LO position and

burner is lit

when burner is cold

let warm up for a minute

2.

Air in gas line

2.

Operate burner until air is removed from

line. Have gas line checked by local

natural gas company

3.

Air passageways on heater blocked

3.

Observe minimum installation clear-

ances (see page 7)

4.

Dirty or partially clogged burner orifice

4.

Clean burner (see Cleaning and Mainte-

nance, page 18) or replace burner orifice

Dark residue on logs or inside of fireplace

1.

Improper log placement

1.

Properly locate logs (see Installing Gas

Log Heater Into Stove, page 11 )

2.

Drafts or other air currents affecting

2.

Eliminate source of drafts around heater

flame pattern

3.

Air holes at burner inlet blocked

3.

Clean out air holes at burner inlet. Peri-

odically repeat as needed

4.

Burner flame holes blocked

4.

Remove blockage or replace burner

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