23
13.0
TROUBLESHOOTING
Issue
Cause
Solution
No spark from electrode
to pilot when piezo
button is triggered
Piezo igniter wiring
disconnection
Check and repair, if necessary, wire connections between piezo
igniter and igniter electrode.
Verify piezo igniter is properly grounded. Tighten mounting fastener
if required.
Electrode wiring disconnection Check wiring at back of electrode igniter for proper connection.
Incorrect electrode position
Verify there is a 1/8” (3 mm) gap between the electrode and pilot.
Readjust if necessary. Direct metal contact may cause an arc below
the electrode and along the electrode wire.
Spark igniter will not
light after repeated
triggering of piezo
button
No gas
Check for multiple shut-off valves in the supply line.
Low gas pressure
Consult a plumber or a gas supplier. Can be caused by situations
such as a bent line, too narrow diameter of pipe, or a low line
Pilot will not stay lit
after carefully following
lighting instructions
Pilot flame does not impinge on
thermocouple
Clean pilot hood.
Loose thermocouple
connection
Ensure thermocouple connection at gas valve is full inserted and
tight - hand tight plus 1/4 turn.
Thermocouple reading below
15 millivolts
Disconnect the thermocouple from valve. Place one millivolt meter
lead wire on the end of the thermocouple, and the other millivolt
meter lead wire on the thermocouple’s copper wire. Start the pilot
while holding the gas valve control knob in.
If the millivolt reading is less than 15 millivolts, replace
Thermopile not generating
sufficient millivolts
Adjust, if necessary, the pilot flame to envelope thermopile.
Check thermopile connections are properly wired to the gas control
valve. Tighten if necessary.
Measure millivolt production with a millivolt meter. Turn remote/
thermostat/wall switch, or ON/OFF rocker switch to OFF. Turn the
gas valve control to the PILOT position (pilot should remain lit).
Take millivolt reading at TH-TP and TP terminals on gas valve.
Reading should be 350 millivolts, minimum.
If reading is less than 350 millivolts, replace thermopile.
Frequent pilot outages
Pilot shield not installed
Install pilot shield.
Pilot safety drop out
Pilot flame is too high or too low. Clean pilot hood and adjust pilot
from for maximum flame impingement on thermopile.
ATTENTION
TROUBLESHOOTING MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
