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ENGLISH
Kerosene Foreced Air Heater (ST-80T-KFA/ST-140T-KFA/ST-215T-KFA)
NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR WHILE CONNECTED TO A POWER SOURCE
TROUBLESHOOTING GUIDE
Problem
Possible Cause
Solution
Heater ignites, but
main PCB shuts off
after a short period
of time.
Lamp flickers and
LED display shows
E1.
1.
Incorrect pump pressure.
2.
Dirty input, output or lint filter.
3.
Dirty fuel filter.
4.
Nozzle is dirty.
5.
Photocell lens is dirty.
6.
Photocell not installed properly.
7.
Photocell is defective.
8.
Improper electrical connection between
main PCB and photocell.
9.
Improper location of thermister sensor.
10. Improper electrical connection within
the temperature limit switch.
1.
Adjust pump pressure.
2.
Clean/replace air or lint filter.
3.
Clean/replace fuel filter.
4.
Clean/replace nozzle.
5.
Clean/replace photocell.
6.
Adjust photocell position.
7.
Replace photocell.
8.
Check wiring connections (See Wiring
Connections on Page 10).
9.
Check thermister placement.
10. Replace temperature limit switch.
Heater will not
operate or motor
runs for a short
time.
Lamp flickers and
LED display shows
E1.
1.
No kerosene in the fuel tank.
2.
Incorrect pump pressure.
3.
Corroded spark plug or incorrect
plug gap.
4.
Dirty fuel filter.
5.
Dirty nozzle.
6.
Moisture in fuel tank.
7.
Improper electrical connection
between transformer and circuit
board.
8.
Ignitor wire not connected to spark
plug.
9.
Defective ignitor.
10. Improper spacing with rotor.
1.
Fill tank with fresh kerosene.
2.
Adjust pump pressure.
3.
Clean/replace spark plug.
4.
Clean/replace fuel filter.
5.
Clean/replace nozzle.
6.
Rinse fuel tank with clean, fresh
kerosene.
7.
Inspect all electrical connections (See
Wiring Connections on Page 10).
8.
Re-attach ignitor wire to spark plug.
Replace ignitor.
9.
Adjust rotor
Fan does not
operate when
heater is plugged
in and power
switch is in the ON
position. The lamp
is flickering or and
LED display shows
E1 or E2.
1.
Thermostat is set too low.
2.
Broken electrical connection
between main PCB and motor.
1.
Rotate thermostat to a higher setting
2.
Inspect all electrical connections (See
Wiring Connections on Page 10).
Lamp is flickering
and LED display
shows E3.
1.
Thermostat switch has failed.
1.
Replace thermostat switch (See
Wiring Connections on Page 10).
Poor combustion
and/or excess soot
production.
1.
Dirty input, output or lint filter.
2.
Dirty fuel filter.
3.
Poor quality of fuel.
4.
PSI is too high or too low.
5.
Dirty nozzle
1.
Clean/replace air or lint filter.
2.
Clean/replace fuel filter.
3.
Flush fuel tank and refuel heater.
4.
Use proper pressure.
5.
Clean/replace nozzle.
Heater does not
turn on and the
lamp is not lit.
1.
Temperature limit sensor has
overheated.
2.
No electrical power.
3.
Fuse is blown.
4.
Improper electrical connection
between temperature limit sensor
and circuit board.
1.
Push power switch to OFF and allow
heater to cool for 10 minutes. Restart
heater.
2.
Check power cords for proper
connection and test the power
supply.
3.
Check/replace the fuse.
4.
Inspect all electrical connections (See
Wiring Connections on Page 10).
