NEVER LEAVE HEATER UNATTENDED WHILE CONNECTED TO
A POWER SOURCE
© 2018 Stanley Black & Decker, Inc.
Electric Fan Heater User’s Manual (ST-300A-120)
Troubleshooting
Problem
Cause
Solution
Heating element does not glow red.
1. Heating element is made of a
resistive strip and will not glow
red to produce heat.
1. Heater is operating correctly.
Do not feel heat or air flow.
1. No power to heater.
2. Desired room temperature
reached.
3. You have reached the safety shut
off temperature.
1. Check power connections.
Connect heater to power supply.
2. Thermostat will shut off once
desired room temperature is
reached. Heater is operating
correctly.
3. Unplug unit and check for
obstructions to the heater’s
airflow. After 15 minutes, plug
the heater back in.
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