Full Product Manual

Troubleshooting
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
1. Pilot will not stay lit
after carefully
following lighting
instructions.
A. Generator producing insufficient
millivolts.
Check the pilot flame. It must impinge on the
generator. Be sure the generator is fully
inserted in the bracket. Make sure the pilot
lighting door is tightly closed.
B. Generator defective. Check generator with millivolt meter. Take
reading at generator terminals of valve with
pilot burning and thermostat contacts closed.
The reading should be 140 millivolts or more.
C. Loose or dirty generator connections at
gas valve.
Clean and/or tighten connections at valve.
D. Grounded thermostat lead wire. Remove thermostat lead wires from valve
terminals. If the pilot now stays lit, trace the
thermostat wiring circuit for a ground. May be
grounded to the furnace, gas supply, nails or
staples.
E. Defective gas valve. Replace the gas valve after the above is
verified.
2. Pilot burning - no
gas to the main
burner.
A. Valve not turned to “ON” position after
lighting the pilot.
Turn the gas valve knob to the "ON" position.
B. Thermostat not turned to a position
calling for heat.
Set the thermostat to a position calling for
heat.
C. Plugged burner orifice. Check - clean or replace.
D. Improperly wired or broken thermostat
wires.
Defective thermostat.
Check the connections at the valve terminals.
Jumper across the thermostat terminals on the
valve. If the valve operates, check the
thermostat wires.
E. Pilot generator may not be generating
sufficient milli volts to open valve.
See 1A and 1C above.
F. Defective valve. Replace the gas valve after above is verified.
3. Burner comes "ON"
but goes "OFF"
after operating for
no apparent
reason.
A. Tubes not properly installed. Check the vent tube and the air inlet tube.
Follow the installation instructions. Be sure the
joints are tight and both tubes are in place.
Use only the tubes furnished. Do not extend
the tubes beyond original length.
B. Furnace may be overrated. Check for high pressure at the valve. See
rating plate for specified min./max. supply
pressure. Check the burner orifice.
4. Furnace operates,
but turns "OFF"
before room
temperature is
attained.
A. Thermostat location. Check the thermostat location. It should not be
in the path of warm air discharge from the
furnace, near a lamp or above a T.V. or stereo
set.
B. Defective thermostat. Check the thermostat calibration or replace.
5. Furnace not
producing sufficient
heat.
A. Furnace may be too small for space
being heated.
Check heat calculations.
B. Furnace not burning at full rate. Check for low gas pressure. Check the burner
orifice.
6. Furnace operates,
but will not shut
"OFF" when room
temperature is
attained.
A. Thermostat wiring defective. Thermostat lead wires may be shorted
together, by a nail or staple. Check by
removing thermostat leads from the valve
terminals.
B. Thermostat location. Check the thermostat location. If on an outside
wall or there is a hole in the wall behind the
thermostat causing cold air to contact the