TROUBLESHOOTING
37
12.0 TROUBLESHOOTING
ATTENTION: Troubleshooting must be performed by a qualified
technician.
Issue
Cause
Solution
No spark from electrode to pilot
when piezo button is trigger
Piezo igniter wiring
disconnection
Verify piezo igniter is properly grounded. Tighten mounting
fastener, if required.
Check and repair, if necessary, the wire connections between
the piezo igniter and igniter electrode.
Electrode wiring disconnection
Check wiring at back of electrode igniter for proper connection.
Incorrect electrode position
Verify there is a 1/8 in (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.
Check LP (propane) tank for gas supply. Refill if necessary.
Pilot will not stay lit after carefully
following lighting instructions
Pilot flame does not impinge on
thermocouple
Clean pilot hood
Adjust pilot flame at gas valve for proper flame impingement.
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
thermocouple.
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 dropout
Pilot flame is too high or too low. Clean pilot hood and adjust
pilot from for maximum flame impingement on thermopile.
