Desa GVC35NA - Manual (Page 27)

27
100749
TROUBLE-
SHOOTING
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. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call
the fire department.
POSSIBLE
CAUSE
1. Metal expanding while
heating or contracting
while cooling.
1. Heater burning vapors
from paint, hair spray,
glues, etc.
2. Gas leak. See Warn-
ing statement at
top of page.
1. Heater not venting
correctly. Vent safety
switch shuts off
heater.
2. Low line pressure.
3. Pilot partially clogged.
1. Gas leak. See Warn-
ing statement at
top of page.
2. Control valve dam-
aged.
1. Foreign matter between
control valve and burner.
2. Gas leak. See Warn-
ing statement at
top of page.
3. Foreign fumes in area
of heater being drawn
through burner com-
bustion.
OBSERVED
PROBLEM
Heater produces a
clicking/ticking noise
just after burner is lit
or shut off.
Heater produces
unwanted odors.
Heater shuts off in
use.
Gas odor even when
control knob is in
OFF position.
Gas odor during
combustion.
REMEDY
1. This is common with
most heaters. If noise is
excessive, contact quali-
fied service person.
1. Ventilate room. Stop us-
ing odor causing products
while heater is running.
2. Find and correct all leaks
(see Checking Gas
Connections, page 13).
1. Check venting system.
If damaged or blocked,
repair. If venting
system is OK, have
qualified service person
replace vent safety
switch, wire harness, or
thermocouple inter-
rupter.
2. Contact local natural
gas company.
3. Clean pilot (see Clean-
ing and Maintenance,
page 23).
1. Find and correct all leaks
(see Checking Gas
Connections, page 13).
2. Replace control valve.
1. Take apart gas tubing and
remove foreign matter.
2. Find and correct all
leaks (see Checking Gas
Connections, page 13).
3. Ventilate area around
heater to remove any
foreign fumes.