Desa SPC-21PHTSA User Manual
www.desatech.com
114082-01A
10
TROUBLESHOOTING
Continued
WARNING: If you smell gas
• Shut off gas supply.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your
building.
• Immediately call your gas supplier from a neighbor’s phone. Fol-
low the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT:
Operating heater where impurities in air exist may create odors. Cleaning supplies,
paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes.
These fumes may mix with combustion air and create odors.
POSSIBLE CAUSE
1. Burner orifice is clogged or
damaged
2. Inlet gas pressure is too low
3. Burner damaged
4. Gas regulator defective
1. Residues from manufacturing
processes
1. Heater burning vapors from
paint, hair spray, glues, etc.
See IMPORTANT statement
above
2. Low fuel supply
3. Gas leak. See Warning
statement at top of page
1. Not enough fresh air is avail-
able
2. Low line pressure
3. ODS/pilot is partially
clogged
4. Tip over switch activated
from bumping heater
1. Gas leak. See Warning
statement at top of page
2. Control valve defective
REMEDY
1. Clean burner orifice (see Clean-
ing and Maintenance, page 7)
or replace burner orifice
2. Replace propane/LP gas
cylinder
3. Replace burner
4. Replace gas regulator
1. Problem will stop after a few
hours of operation
1. For outdoor use only. Stop
using odor-causing products
while heater is running
2. Replace propane/LP gas
cylinder
3. Locate and correct all leaks
1. For outdoor use only. Provide
adequate ventilation
2. Replace propane/LP gas
cylinder
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 7)
4. Relight heater
1. Locate and correct all leaks
2. Replace control valve
OBSERVED PROBLEM
Burner backfiring during com-
bustion
Slight smoke or odor during
initial operation
Heater produces unwanted
odors
Heater shuts off in use
Gas odor even when control knob
is in OFF position