Desa CB36N - Manual (Page 27)

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TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1..Gas.control.knob.not.fully.
pressed.in
..Gas. control. knob. not.
pressed.in.long.enough
3..Equipment. shutoff. valve.
not.fully.open
4..Pilot. flame. not. touching.
thermocouple, which al-
lows thermocouple to cool,
causing.pilot.to.go.out..This.
problem.could.be.caused.
by.one.or.more.of.the.fol-
lowing:
. A).Low.gas.pressure
. B).Dirty.or.partially.clogged.
pilot
5..Thermocouple.connection.
loose.at.control.valve.
6..Thermocouple.damaged
7..Control.valve.damaged
1. Burner orifice clogged
..Inlet. gas. pressure. is. too.
low
3..Thermopile. leads. dis-
connected.or.improperly.
connected
4..Thermopile.is.defective
5..Improper.venting.or.exces-
sive.blockage
1..Manifold. pressure. too.
low
2. Burner porting or orifice
clogged
1. Burner orifice is clogged or
damaged
..Damaged.burner
3..Gas.regulator.defective
1..Residues. from. manufac-
turing.processes.and.logs.
curing
OBSERVED PROBLEM
Manual Ignition System Only
Pilot lights but flame goes
out. when. control. knob. is.
released
Burner. does. not. light. after.
pilot. is. lit. or. cycles. during.
operation.
Delayed.ignition.at.burner
Burner backfiring during com-
bustion
Slight. smoke. or. odor. during.
initial.operation
REMEDY
1..Press. in. gas. control. knob.
fully
..After pilot lights, keep gas
control. knob. pressed. in. 30.
seconds
3..Fully.open.equipment.shut-
off.valve
4..A).Contact.local.natural.or.
propane/LP.gas.company
. B).Clean.pilot.(see.Cleaning
and Maintenance, page 24)
or.replace.pilot.assembly
5. Hand tighten until snug,
then.tighten.1/4.turn.more
6..Replace.pilot.assembly
7..Replace.control.valve
1..Clean.burner.(see.Cleaning
and Maintenance, page 24)
or replace burner orifice
..Contact.local.propane/LP.or.
natural.gas.company
3..Reconnect.leads
4..Replace.thermopile
5..Have. the. vent. system. in-
spected, including the ter-
mination.cap..Remove.any.
restriction.or.obstruction
1..Contact.local.propane/LP.or.
natural.gas.company
..Clean.burner.(see.Cleaning
and Maintenance, page 24)
or replace burner orifice
1..Clean.burner.(see.Cleaning
and Maintenance, page 24)
or replace burner orifice
..Replace.damaged.burner
3..Replace.gas.control
1..Problem.will.stop.after.a.few.
hours.of.operation