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SRH pg. 24
BURNER TROUBLESHOOTING (1 OF 2)
Check for loose wire or
connector and correct
the problem.
Is the spark gap
Is there 115 VAC at the ignition
detection control?
Is the ignitor sparking
at the tips?
Check high voltage wire.
Is it okay?
Replace ignitor.
Replace IDC box.
Replace ignitor.
Adjust spark gap.
Does the burner ignite?
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
Are inlet and exhaust piping
the proper size and length?
(refer to manual)
Replace piping as required.
Does the pressure switch
YES
NO
NO
Is inlet or exhaust blocked?
Clear blockage.
YES
YES
Do the termination fittings
meet factory specifications?
YES
NO
Replace as required.
YES
NO
Check thermostat and wiring.
Find problem and correct it.
Is the power supply to
heater 115 VAC?
Replace blower.
NO
YES
NO
Is the power supply to
the heater fused?
YES
Replace fuse.
Energize the system
YES
Disconnect flex hose at each heater until
gas is present. Connect flex hose and leak test.
NO
Have all gas lines been
completely bled of air?
Is this a new installation?
YES
NO
Were heaters isolated during
high pressure leak testing?
YES
NO
Replace combination gas
YES
1
2
valves on each heater.
light come on?
Does the blower / PL-1
close / PL-2 light come
on?
Does the ignitor spark /
PL-3 light come on?
5/32 in. [.156" (.396cm)]?
NO
Is airflow tubing or its
snubber orifice blocked?
(check both tubes)
Replace pressure switch.
Is the blower wheel
damaged or dirty?
Clean or repair wheel.
YES
NO
NO
Clear blockage.
YES
NO
(There are 3 trials-for-ignition
before IDC goes into lockout).
YES