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NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR
Troubleshooting Guide: ST-70-SS-E / ST-70T-SS-E / ST-125-OFR-E
Problem
Heater fires, but shuts down after a
short period of time. Lamp is flicker-
ing, and LED display shows "E1"
Heater will not operate, or motor
runs for short time. Lamp flickers
and LED display shows "E1"
Fan does not operate when heater
is plugged in and Operating Switch
is in the "ON" position. The lamp
is flickering or on and LED display
shows "E1" or "E2"
Heater makes grinding noise.
Heater does not turn on and the
lamp is not lit.
Poor combustion and / or soot
production.
Lamp is flickering, and LED display
shows "E0".
© 2021 Pinnacle Climate Technologies, Inc.
WHILE CONNECTED TO A POWER SOURCE
Possible Cause
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
8. Improper pressure.
1. No Paraffin/diesel in fuel tank.
2. Corroded Spark Plug or incorrect
plug gap.
3. Dirty Fuel Filter.
4. Dirty Nozzle.
5. Moisture in Fuel/Fuel Tank.
6. Improper electrical connection
between Transformer and Circuit
Board.
7. Transformer Wires not connected to
Spark Plug.
8. Defective Transformer.
1. Broken electrical connection
between Circuit Board and motor.
2. Not enough amps available to power
heater.
1. Air in fuel pump.
1. Temperature limit sensor has over-
heated.
2. No electrical power.
3. Fuse break down.
4. Improper electrical connection
between Temperature Limit Sensor
and Circuit Board.
1. Pump Pressure.
2. Poor fuel quality.
1. Faulty Tip Over Switch.
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 11).
7. Check to be sure cooling fan is not
obstructed.
8. Adjust pump pressure.
1. Fill tank with fresh Paraffin/diesel.
2. Clean/replace Spark Plug.
3. Clean/replace Fuel Filter.
4. Clean/replace Nozzle.
5. Rinse out fuel tank with clean fresh
Paraffin/diesel.
6. Inspect all electrical connections.
(See Wiring Diagrams, Page 11).
7. Re-attach Transformer wires to
Spark Plug.
8. Replace Transformer.
1. Inspect all electrical connections on
Wiring Diagrams (Page 11).
2. Use a new extension cord or try
another electrical socket.
1. Sound will stop after 3 seconds. If
grinding sound continues, add fuel to
tank.
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 11).
1. Be sure pump pressure is adjusted
correctly.
2. Be sure Paraffin/diesel is not old or
contaminated.
1. Replace Tip Over Switch.
12
Solution
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