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B. The burner goes to lockout after the prepurge period
because the flame does not ignite.
a. No fuel in tank or lines.
b. Air has not been fully bled from the fuel lines.
c. The fuel filter is dirty. Replace filter.
d. Nozzle is plugged. Replace nozzle.
e. The spark is irregular or not present. Re-align
electrodes.
C. The burner does not start when the thermostat calls
for heat.
a. Loose wire connection at terminals L or N.
b. Terminals on the control module are bent or loose.
c. The motor is defective.
d. The capacitor is defective.
e. The control box is defective.
7.3 Electrical Schematics
