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III. Main burner will not light
IV. Soot deposits on glass
V. Flame burns blue and lifts
off burner
VI. Flames impinge on firebox
top
A. Valve / Switches
1. Valve control off
2. Blockage at the burner (line,
orifice, or ports)
3. Defective wall switch or
thermostat
4. Defective wiring or connections
5. Excessive length of thermostat
wire from valve to wall switch or
thermostat
6. Wall switch or thermostat
incorrectly wired
7. Defective Valve
8. Thermopile may not be
generating sufficient voltage
(460 mV)
9. Wall switch, thermostat, or wires
are defective
10. Defective spill switch (B-Vent)
1. Flame impingement on logs
2. Improper primary air setting
Foreign material impeding burner
3. Air inlet blocked or restricted
4. Vent system is restricted or
inadequate
1. Insufficient combustion air being
supplied
2. Manifold pressure set too high
3. Vent system restricted
1. Vent system is restricted or
inadequate
2. Manifold pressure too high
1. Turn to "ON" position
2. Check and clean
3. Conduct a continuity test or jumper wire
test and replace if defective
4. Conduct a test with a jumper wire and
repair as required
5. Reduce wire length to less than 100 feet
or increase wire size
6. Wire correctly
7. Turn valve and "ON/OFF" switch to the
"ON" position. Check with millivolt meter
at terminals TP-TH & TH. Millivolt meter
should read greater then 460 millivolts. If
the reading is OK and the burner does
not come on, replace the gas valve
8. Recheck using the millivolt meter. The
pilot flame may not be high enough for
the flame to properly engulf the
thermopile. If so, adjust and reset. If
voltage is still insufficient, replace
thermopile
9. Follow previous corrective action, check
switch and wiring. Replace where
defective
10. Check continuity and replace if defective
1. Adjust the log set to avoid direct flame
impingement. Follow log placement
instructions
2. Open aeration shutter more.
3. Ensure that no foreign material blocks
burner flame ports
4. Clean air inlets
5. Conduct flue spillage test (B Vent) and
correct flue as required, check correct
termination is used.
1. Ensure that no foreign material blocks air
inlets and that the burner shutter is
correctly adjusted. Ensure the vent is
adequate
2. Check manifold pressure
3. Check vent system
1. Correct flue as required
2. Check manifold pressure as required
35
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