Monessen Hearth VDY24/18, Installation And Operating Instructions Manual

28 

32D1999

If  the  gas  quality  is  bad,  your  pilot 
may  not  stay  lit,  the  burners  may 
produce  soot  and  the  heater  may 
backfire when lit. If the gas quality or 
pressure is low, contact your local gas 
supplier immediately.

W

ARNING

4.  Thermocouple connection loose 

at control valve.

5.  Pilot flame not touching thermocouple, 

which allows thermocouple to cool, caus-
ing pilot flame to go out. This problem 
could be caused by either low gas pres-
sure, or a dirty or partially clogged pilot.

6.  Thermocouple damaged.
7.  Control valve damaged.

1.  Burner orifice is clogged.
2.  Burner orifice diameter is too small.
3.  Inlet gas pressure is too low.

1.  Manifold pressure is too low.
2.  Burner orifice is clogged.

1.  Burner orifice is clogged or damaged.
2.  Burner is damaged.
3.  Gas regulator defective.

1.  Vapors from paint or curing process  of logs.

1.  Turning control knob to HIGH position 

when burner is cold.

2.  Air in gas line.

3.  Dirty or partially clogged burners orifice.

1.  LP-regulator shut down due to inlet pres-

sure too high.

4.   Hand tighten until snug, then tighten 
  1/4 turn more.
5.  Contact local gas company.

6.  Replace thermocouple.
7.  Replace control valve.

1.   Clean burner or replace burner orifice.
2.  Replace burner orifice.
3.  Contact qualified service person.

1.  Contact local gas company.
2.  Clean burner or replace burner orifice.

1.  Clean burner or replace burner orifice.
2.  Replace burner.
3.  Replace gas regulator.

1.  Problem will stop after a few hours of 

operation. 

1.  Log is intended to be smokeless. 

Turn OFF heater and call qualified 
service person.

1.  Turn control knob to ON position and 

let warm up for a minute.

2.  Operate burner until air is removed 

from line. Have gas line checked  by 
local gas company.

3.   Clean burner or replace burner orifice.

1.  Verify LP tank regulator is installed 

and set at 11" to 13" w.c.

2.  Replace regulator on heater.

One or both burners do not 
light after pilot is lit.

Burner backfires during com-
bustion.

Slight smoke or odor during 
initial operation.

Logs appear to smoke after 
initial operation.

Heater produces a whistling 
noise when burner is lit.

No gas to pilot. 

TROUBLESHOOTING

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY