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38
Maintenance & Care
Troubleshooting
Problem
Possible Cause
Solution
Heater fires, but main
PCB shuts heater off
after a short period of
time, flame is flickering,
and LED display show
“E1” (1 flash).
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 defective.
8. Improper electrical connection
between main PCB and photocell.
1. Adjust pump pressure.
2. Clean/replace air 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.
Heater will not operate,
or motor runs for short
time, lamp flickers and
LED display shows “E1”
(1 flash).
1. No diesel in 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/fuel tank.
7. Improper electrical connection
between transformer and circuit
board.
8. Igniter wire not connected to spark
plug.
9. Detective igniter.
1. Fill tank with fresh diesel.
2. Adjust pump pressure.
3. Clean/replace spark plug.
4. Clean/replace fuel filter.
5. Clean/replace nozzle.
6. Rinse out fuel tank with clean
fresh diesel.
7. Inspect all electrical connection
(see wiring diagrams).
8. Re-attach igniter wire to spark
plug.
9. Replace igniter.
Fan does not operate
when heater is plugged
in and power switch is in
the “ON” position. The
lamp is flickering or on
and LED display shows
“E1” or “E2” (1 flash or 2
flashes).
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 connection
(see wiring diagrams).
Lamp is flickering, and
LED display shows “E3”
(3 flashes).
1. Thermostat switch has failed.
1. Replace thermostat switch, wiring
diagrams.
Poor combustion
and / or excess soot
production.
1. Dirty input output or lint filter.
2. Dirty fuel filter.
3. Poor quality of fuel.
4. Pump pressure is too high or too
low.
1. Clean/replace air filter.
2. Clean/replace fuel filter.
3. Be sure fuel is not contaminated
or old.
4. Use proper pressure.
Heater does not turn on
and the lamp is not lit.
1. Temperature limit sensor has
overheated.
2. No electrical power.
3. Fuse 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.
Push switch back to “ON”.
2. Check power cord and extension
cord to insure of proper connection,
test power supply.
3. Check/replace fuse.
4. Inspect all electrical connection
(see wiring diagram).
