PROBLEM
POSSIBLE CAUSE
SOLUTION
Pilot will not light
No gas
1)Bleed air from gas line.
2)Check stop cocks are in on
position.(No blockage in line)
Wrong inlet pressure
Adjust inlet pressure with main burner
running.(see diagram)
Defective
spark
electrode.
Replace electrode if the insulator is
cracked or the tip is corroded. Verify that
the spark gap between the pilot and the
electrode is correct.
Defective piezo wire.
Replace piezo wire if insulation is
damaged , or the wire is broken or
corroded.
Safety
interlock
function engaged.
Allow thermocouple to cool until the mV
drops below the hold in requirements of
the safety magnet,(30 seconds or less).
Re-light pilot.
Pilot will not hold
Wrong inlet pressure.
Adjust inlet pressure with main burner
running (see diagram).
Pilot adjustment screw
not properly adjusted.
Refer to item # 7 in the set-up
guide.(also see diagram)
Thermocouple
or
thermo-generator not
properly inserted into
the pilot housing.
Refer to item #3 in the set-up guide.(see
diagram)
Thermocouple
or
thermo-generator has
film build-up on tip.
With the thermocouple and thermo-
generator tips cool, clean the upper 3/8”
with a very fine emery cloth.
Electrical resistance too
high.
Using a very fine emery cloth, clean
thermo-generator and thermocouple
connections at valve. Tighten
thermocouple into valve hand tight, plus
¼ turn with a wrench.
Defective
thermocouple(mV Plus
systems)
Verify that thermocouple is not kinked
or damaged. Check open circuit voltage
of thermocouple. Voltage should be
between 18mV and 28mV. If voltage is
less than 14mV, replace thermocouple.
Defective
thermo-
generator.(Millivolt
system)
Refer to item # 7 in the set-up guide.