Desa VF-24P-PDG Manuel D’Utilisation

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TROUBLESHOOTING

One or both burner does not light after 
ODS/pilot is lit

Delayed ignition of burner

Burner backfi ring  dur ing  com bus tion

Orange flame in burner during burner 
com bus tion

Slight smoke or odor during initial op-
 er a tion

Heater produces a whis 

tling noise when 

burners are lit

White powder residue forming within burn er 
box or on adjacent walls or furniture

Moisture/con den sa tion  no ticed  on  win-
 dows

1.   Contact local natural or pro pane/LP gas 

company

2.  Clean burner(s) (see Cleaning and 

Main te nance, page 19) or re place burner 
orifi ce(s)

3.   Contact qualifi ed service person
4.   Replace burner orifi ce(s)
5.   Put remote selector in ON position

6.   See Wiring Diagram, page 24

1.   Contact local natural or pro pane/LP gas 

company

2.  Clean burner(s) (see Cleaning and 

Main te nance, page 19) or replace burner 
orifi ce(s)

3.   Contact qualifi ed service person

1.   Clean burner (see Cleaning and Main-

 te nance, page 19) or replace burner 
ori fi ce

2.   Replace damaged burner
3.   Replace gas regulator

1.  Check burner(s) for dirt and debris. If 

found, clean burner(s) (see Cleaning and 
Main te nance, page 19)

2.   Replace gas regulator

1.  Problem will stop after a few hours of 

operation

1.   Turn control knob to LO position and let 

warm up for a minute

2.  Operate burners until air is re moved 

from line. Have gas line checked by lo-
 cal nat u ral or propane/LP gas com pany

3.  Observe minimum in stal la tion  clear-

 anc es (see pages 7 through 9)

4.   Clean burners (see Cleaning and Main-

 te nance, page 19) or replace burner 
orifi ce(s)

1.  Turn heater off when using furniture 

polish, wax, carpet cleaners, or similar 
products

1.  Refer to Air for Com bus tion  and  Ven ti -

la tion  re quire ments  (page  4)

1.   Inlet gas pressure is too low

2.   Burner orifi ce(s) clogged

3.   Mislocated crossover tube
4.   Burner orifi ce(s) di ame ter is too small
5.  Remote selector in OFF position (Re-

 mote-Ready Models Only)

6.  Wire disconnected from gas control 

(Re mote-Ready  Models  Only)

1.   Manifold pressure is too low

2.   Burner orifi ce(s) clogged

3.   Mislocated crossover tube

1.   Burner orifi ce is clogged or damaged

2.   Damaged burner
3.   Gas regulator defective

1.   Not enough air

2.   Gas regulator defective

1.   Residues from manu fac tur ing  pro cess es 

and logs curing

1.  Turning control knob to HI po si tion 

when burners are cold

2.   Air in gas line

3.   Air passageways on heat er blocked

4.  Dirty or partially clogged burner 

orifi ce(s)

1.   When heated, vapors from furniture pol-

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

1.   Not enough com bus tion/ven ti la tion  air

TROUBLESHOOTING