Rev 07/20/16 #730021
Symptom Problem Solution
If you are uncomfortable working with electricity, running electrical supply
wire or installing a circuit breaker, please consult a licensed electrician.
TROUBLESHOOTING CHART
©2016 Cadet Printed in USA
Heater doesn’t
work at all.
1. Supply connections are
loose.
2. Heater has tripped one of
its high-temperature safety
shutoffs.
3. Heater has tripped its
secondary high-temperature
safety shutoff.
4. Supply circuit is faulty.
1. Turn off power at main disconnect panel. Inspect and/
or tighten all the wire connectors inside the heater and at
any connection points inside junction boxes or at the wall
thermostat.
2. TO RESET: Turn power off at main disconnect panel. Allow
20 minutes to cool. Make sure heater is not blocked and is
clean. Restore power. If the high-temperature safety shutoff
trips more than once a day, replace the heater.
3. Replace heater.
4. Call a licensed electrician.
Breaker trips
immediately
after installing
heater.
1. A short circuit exists in
the electrical supply wires or
heater wiring.
2. Circuit breaker and heater
are not the same voltage.
3. Circuit is overloaded.
4. Supply circuit is faulty.
1. An incorrect connection in the heater or electrical supply
wires may cause sparking or arcing. Inspect all heater and
electrical supply wiring insulation for damage or call an
electrician.
2. Double check the voltage of the heater to make sure it
matches the voltage of the circuit. Replace heater with a
model that is 240 volts.
3. Use a lower wattage heater, or reduce the number of
heaters on the circuit.
4. Call a licensed electrician.
Heater blows
cold air or
doesn’t get
hot.
1. Element has failed.
2. Only one side heats and
the other side has tripped
one of its high-temperature
safety shutoffs (Model CST
only).
1. Replace heater.
2. TO RESET: Turn power off at main disconnect panel. Allow
20 minutes to cool. Make sure heater is not blocked and is
clean. Restore power. If the high-temperature safety shutoff
trips more than once a day, replace the heater.
Heater
smells after
installation
or not being
used.
1. Odor from element
manufacturing process.
2. Dust or lint inside the
heater.
3. Supply connections are
loose.
1. On initial start-up, the heater may cause an odor due to the
manufacturing process. It typically goes away within several
hours.
2. Clean heater (see “MAINTAINING YOUR HEATER” on
page 7 for instructions).
3. Turn off power at main disconnect panel. Inspect and/
or tighten all the wire connectors inside the heater and at
any connection points inside junction boxes or at the wall
thermostat.
Fan/motor
doesn’t spin or
spins slow.
1. Circuit breaker is 120 volts
and heater is 240 volts.
2. Defective motor or motor
out of alignment.
1. Double check the voltage of the heater to make sure it
matches the voltage of the circuit. Replace heater with a
model that is 120 volts.
2. Replace motor.
Heater doesn’t
turn off.
1. Thermostat is defective.
2. No thermostat hooked up
to control heater.
3. Incorrect heater wattage
for room size.
1. Replace thermostat.
2. A thermostat is required for all Com-Pak heaters. Purchase
a built-in or wall thermostat for your heater.
3. Install higher wattage model or additional heaters if circuit
allows.
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