Monessen Hearth VFCS20DNV - Manual (Page 30)

30 58D6002
TROUBLESHOOTING
W
ARNING
If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and
the heater may backfire when lit. If the gas quality or pressure is low, contact your
local gas supplier immediately.
SYMPTOM POSSIBLE CAUSE ACTION
ODS/pilot
lights, but
flame goes
out when
control knob
is released. 1. Control knob not fully pressed
in.
1. Press in control knob fully.
2. Control knob not pressed in
long enough.
2. After ODS/pilot lights, keep control knob pressed in for 30 seconds.
3. Appliance shutoff valve not
fully open.
3. Fully open manual shutoff valve.
4. Thermocouple connection
loose at control valve.
4. Hand tighten thermocouple connection until snug, then tighten 1/4
turn more.
5. Pilot flame not touching
thermocouple, which allows
thermocouple to cool, caus-
ing pilot flame to go out.
5. Contact local gas company. This problem could be caused by either
low gas pressure, or a dirty or partially clogged ODS/pilot.
6. Thermocouple damaged. 6. Replace pilot.
Burner does
not light after
ODS/pilot is
lit. 1. Inlet gas pressure is too
low.
1. Contact qualified service person.
2. Burner orifice diameter is too
small.
2. Replace burner orifice.
3. Burner orifice is clogged. 3. Burner orifice is clogged.
Burner back-
fires during
combustion. 1. Manifold pressure is too
low.
1. Contact local gas company.
2. Burner orifice is clogged. 2. Clean burner or replace burner orifice.
Slight smoke
or odor
during initial
operation. 1. Burner orifice is clogged or
damaged.
2. Replace burner.
2. Burner is damaged. 2. Replace burner.
3. Gas regulator defective. 3. Replace gas regulator.
Logs appear
to smoke
after initial
operation. 1. Vapors from paint or curing
process of logs.
1. Problem will stop after a few hours of operation. Open a window for
the first few hours.
2. Log heater is intended to be smokeless. Turn OFF heater and call
qualified service person.
Heater pro-
duces a whis-
t l i n g n o i s e
when burner
is lit. 1. Vapors from paint or curing
process of logs.
1. Problem will stop after a few hours of operation. Open a window for
the first few hours.
2. Air in gas line. 2. Operate burner until air is removed from line. Have gas line checked
by local gas company.
3. Dirty or partially clogged
burner orifices.
3. Clean burner or replace burner orifice.
No gas to
pilot. 1. LP-regulator shut down due
to inlet pressure too high.
1. Verify LP tank regulator is installed and set at 11" to 13" w.c.