Vanguard Heating VMH26TPC - Manual (Page 25)

www.desatech.com 113111-01D 25
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
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 fireplace
blocked
4. Dirty or partially clogged
burner orifice
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Metal expanding while heating
or contracting while cooling
REMEDY
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 burner until air is re-
moved from line. Have gas line
checked by local propane/LP
gas company
3. Observe minimum installa-
tion clearances (see pages 9
through 12)
4. Clean burner (see Cleaning
and Maintenance, page 22)
or replace burner orifice
1. Turn heater off when using
furniture polish, wax, carpet
cleaners, or similar products
1. This is common with most
fireplaces. If noise is exces-
sive, contact qualified service
person
OBSERVED PROBLEM
Slight smoke or odor during
initial operation
Fireplace produces a whistling
noise when burner is lit
White powder residue forming
within burner box or on adjacent
walls or furniture
Fireplace produces a clicking/
ticking noise just after burner
is lit or shut off