NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR WHILE
CONNECTED TO A POWER SOURCE
Diesel Fired Radiant Heater User’s Manual
© 2020, Lavorwash
13
Troubleshooting Guide
Problem
Possible Cause
Solution
Heater fires, but shuts down after
a short period of time. LED dis-
play shows “E1”.
1. Dirty Fuel Filter.
2. Nozzle Dirty.
3. Photocell Dirty.
4. Photocell not installed properly.
5. Photocell Defective .
6. Improper electrical connec-
tion between Circuit Board and
Photocell.
7. Cooling Fan is obstructed
1. Clean/replace Fuel Filter.
2. Clean/replace Nozzle
3. Clean/replace Photocell .
4. Adjust Photocell position.
5. Replace Photocell.
6. Check wiring connections (See Wiring
Diagrams, Page 14).
7. Check to be sure cooling fan is not
obstructed.
Heater will not operate, or motor
runs for short time. LED display
shows “E1”.
1. No kerosene/ diesel in fuel tank.
2. Corroded Spark Plug or incor-
rect plug gap.
3. Dirty Fuel Filter.
4. Dirty Nozzle.
5. Moisture in Fuel/Fuel Tank.
6. Improper electrical connec-
tion between Transformer and
Circuit Board.
7. Transformer Wires not connect-
ed to Spark Plug.
8. Defective Transformer.
1. Fill tank with fresh kerosene/ diesel.
2. Clean/replace Spark Plug.
3. Clean/replace Fuel Filter.
4. Clean/replace Nozzle.
5. Rinse out fuel tank with clean fresh paraf-
fin/ diesel.
6. Inspect all electrical connections. (See
Wiring Diagrams, Page 14).
7. Re-attach Transformer wires to Spark Plug.
8. Replace Transformer.
Fan does not operate when heat-
er is plugged in and Operating
Switch is in the “ON” position.
LED display shows “E1” or “E2”.
1. Broken electrical connection
between Circuit Board and
motor.
2. Not enough amps available to
power heater.
1. Inspect all electrical connections on Wiring
Diagrams (Page 14).
2. Use a new extension cord or try another
electrical socket.
LED display shows “E3”
1. Thermostat switch has failed.
1. Replace thermostat switch (see wiring
diagram on page 14)
Heater makes grinding noise.
1. Air in fuel pump.
1. Sound will stop after 3 seconds. If grinding
sound continues, add fuel to tank.
Heater does not turn on and the
lamp is not lit.
1. Temperature limit sensor has
overheated.
2. No electrical power.
3. Fuse break down.
4. Improper electrical connection
between Temperature Limit
Sensor and Circuit Board.
1. Push Operating Switch to “OFF” and
allow heater to cool for 5 minutes. Push
Operating 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 connections. (See
Wiring Diagrams, Page 14).
Poor combustion and / or soot
production.
1. Pump Pressure.
2. Poor fuel quality.
1. Be sure pump pressure is adjusted cor-
rectly.
2. Be sure kerosene/ diesel is not old or
contaminated.
