Monessen Hearth BTU/Hr Benutzerhandbuch

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1.  Clean burner (see “Cleaning and Mainte-

 page 26) or replace burner orifice

2.  Replace burner orifice
3.  Contact local gas company

1.  Contact local gas company 
2.  Clean burner (see “Cleaning and Mainte-

 page 26) or replace burner orifice

1.  Clean burner (see “Cleaning and Mainte-

 page 26) or replace burner orifice

2.  Replace burner
3.  Replace gas regulator

1.  Check burner for dirt and debris. If found, 

clean burner (see “Cleaning and Mainte-
nance,”

 page 26)

2.  Replace gas regulator

1.  Problem will stop after a few hours of opera-

tion

1.  Turn control knob to LO position andlet 

warm up for a minute

2.  Operate burner until air is removed from 

line. Have gas line checked by local gas  
company

3.  Observe minimum installation clearances 

(see Figure 8, page 12)

4. Clean burner (see “Cleaning and Mainte-

 page 26) or replace burner orifice

1. Turn heater off when using furniture polish, 

wax, carpet cleaners, or similar products

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 damaged
3.  Gas regulator defective

1.  Not enough air

2.  Gas regulator defective

1.  Residues from manufacturing processes

1.  Turning control knob to HI position when 

burner is cold

2.  Air in gas line

3.  Air passageways on heater blocked

4.  Dirty or partially clogged burner orifice

1.  When heated, vapors from furniture 

polish, wax, carpet cleaners, etc. turn into 
white powder residue

Burner does not light 
after ODS/pilot is lit

Delayed ignition of 
burner

Burner backfiring 
during combustion

Yellow flame during 
burner combustion

Slight smoke or odor 
during initial operation

Heater produces a 
whistling noise when
burner is lit

 

White powder residue 
forming within burner 
box or on adjacent 
walls or furniture