John Deere AC-70 - Manual (Page 17)

Troubleshooting
Operator’s Manual 17
Symptom Problem Solution
Motor starts and runs but
space heater does not
ignite
Space heater ignites but
ignition control assembly
shuts space heater off after
a short period of time.
No fuel in tank.
Pump pressure incorrect.
Dirty fuel filter.
Obstruction in nozzle.
Water in fuel tank.
Bad electrical connection
between ignitor and ignition
control assembly.
Defective ignitor.
Defective ignition control
assembly.
Pump pressure incorrect.
Dirty air intake, air output, and/or
lint filter.
Dirty fuel filter.
Obstruction in nozzle.
Photocell assembly not properly
installed (not seeing the flame).
Dirty photocell lens.
Bad electrical connection
between photocell and ignition
control assembly.
Defective photocell.
Defective ignition control
assembly.
Fill tank with kerosene.
See "Maintenance: Pump
Pressure Adjustment".
See "Maintenance: Fuel Filter".
See "Maintenance: Nozzle
Assembly".
Drain and flush fuel tank with
clean kerosene.
Check electrical connections.
Replace ignitor, see
"Maintenance: Ignitor".
Replace ignition control
assembly.
See "Maintenance: Pump
Pressure Adjustment".
See "Maintenance: Air Output,
Air Intake, and Lint Filters".
See "Maintenance: Fuel Filter".
See "Maintenance: Nozzle
Assembly".
Make sure photocell boot is
properly seated in bracket.
Clean photocell lens.
Check electrical connections.
Replace photocell.
Replace ignition control
assembly.
WARNING: HIGH VOLTAGE. NEVER SERVICE SPACE HEATER WHILE IT IS PLUGGED IN,
OPERATING, OR HOT. SEVERE BURNS AND ELECTRICAL SHOCK CAN OCCUR.