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5.0 TROUBLE SHOOTING
SYMPTOM
I.
Pilot will not light after
repeated triggering of the
piezo ignition button
II. Pilot will not stay lit after
following the lighting
instructions
Pilot will not stay lit after
following the lighting
instructions continued ...
POSSIBLE CAUSE
A. No spark at electrode (weak or not heat source for pilot ignition)
1. Improper ignition
2. Poor connections at starter
and ignition electrode
3. Broken ceramic cover on
ignition electrode
4. Defective piezo igniter
5. Poor grounding of piezo igniter
1. Gas line shut off(s) may not be
turned on
2. Air in gas lines
3. Gas lines may not be
connected
4. Low pressure may be caused
by bent line
5. Valve control knob not fully
depressed in "PILOT" position
A. Thermocouple / Valve
1. Weak or improperly located
pilot flame
2. Defective thermocouple
3. Thermocouple
not
properly
4. Open wire connection in pilot
circuit
5. Defective Valve
B. Defective safety circuit
1. Loose
or
connections
CORRECTIVE ACTION
1. Align the electrode with 1/8" (3mm) gap
to pilot hood
2. Reconnect if loose
3. Replace pilot assembly
4. Replace piezo igniter
5. Tighten mounting nut and/or igniter
screws
B. No gas or low gas pressure
1. Turn on shut-off valves
2. Purge gas lines
3. Connect all gas lines
4. Check for a kinked line
5. Fully depress control knob
1. Adjust and clean pilot. The flame must
impinge on or engulf the thermocouple.
2. Replace thermocouple
installed
3. Make sure all wire connections at the gas
valve terminals are tight and the
thermocouple is fully inserted into the
mounting bracket
4. Check wire continuity and connections in
the pilot circuit
5. Connect the millivolt meter probes to the
thermopile terminals on the gas valve.
Turn the valve to the "PILOT" position,
depress, and light. If the meter reading is
greater than 540 millivolts after 30
seconds, the thermopile is good. If the
pilot does not stay lie, the valve is
defective. Check section "B" below,
before replacing valve
defective
1. Check continuity, tighten wiring or
connections, and repair
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