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Troubleshooting Chart
Symptom Problem Solution
MAINTAINING YOUR HEATER
WARNING! Before removing grill, turn the electrical power off at the main disconnect
panel (circuit breaker or fuse box). Lock or tag the main disconnect panel door to prevent
someone from accidentally turning the power on while you are working on the heater. Failure
to do so could result in serious electrical shock, burns, or possible death.
WARNING: Any other service not detailed in this Owner’s Guide should be performed by an autho-
rized service representative.
*CONSULT LOCAL ELECTRICAL CODES TO DETERMINE WHAT WORK MUST BE PERFORMED BY QUALIFIED
ELECTRICAL SERVICE PERSONNEL.
Breaker trips
immediately
upon energiz-
ing heater.
1. Incorrect supply voltage.*
2. Overloaded circuit.*
3. A short circuit exists in the supply
or heater wiring.*
4. Defective circuit breaker.*
1. Verify that supply voltage matches the heater rating.
2. The total amperage of all heaters on a branch circuit must not be more than
80% of the amperage rating of the circuit breaker and supply wire ratings. Use
a lower wattage heater, or reduce the number of heaters on the circuit.
3. Shorted supply or heater wires may be accompanied by severe sparking.
Inspect all supply and heater wiring insulation for damage. Do not reset the
circuit breaker until all electrical shorts have been repaired.
4. Replace the circuit breaker.
Heater fan
operates, but
does not dis-
charge warm
air.
1. Insufcient element temperature.
2. Incorrect supply voltage.*
3. Element has failed.*
4. (Model CST only) One of the
heater units over temperature con-
trols must be reset.
1. Allow a few moments for element to reach operating temperature.
2. Verify that supply voltage matches the heater rating.
3. Replace element.
4. CST models have two heating units with independent over-temperature
controls. One of the high-temperature manual power reset controls may trip
and cut power to one of the heating units, while the other remains running,
resulting in only half output. Reset the heater unit (see “OPERATING
INSTRUCTIONS” section for “Resetting the Manual Power Reset Limit
Control”).
Heater will not
shut off.
1. Heat loss from room is greater
than heater capacity.*
2. Defective thermostat.
3. Thermostat wired incorrectly to
heater.*
1. Close doors and windows. Provide additional insulation, or install a higher
wattage heater or multiple heaters if necessary. (If your circuit is rated for more
capacity.)
2. Adjust thermostat to its lowest setting. If heater continues to run (allow two
minutes for the thermostat to respond), and room temperature is greater than
50˚; replace the thermostat.
3. Refer to thermostat documentation and correct wiring.
Heater
discharges
smoke or
emits a burnt
odor.
1. Dust, lint or other matter has
accumulated inside heater.
2. Poor or loose electrical connec-
tions.
1. Clean heater (see “MAINTAINING YOUR HEATER” section above for
instructions).
2. Turn off power at circuit breaker. Inspect all supply and heater wire connec-
tions to make sure nothing is loose or poorly connected. Secure or reconnect
all loose connections. Do not reset circuit breaker until all connections have
been checked and repaired.
Element heats
for a moment
without the fan
turning, then
immediately
stops heating.
1. Defective motor or internal
connection.*
2. Fan or motor jammed.
1. Heater or fan motor requires replacement.
2. Remove obstruction and follow instructions in the “OPERATING INSTRUC-
TIONS” section for “Resetting the Manual Power Reset Limit Control.” Test
heater operation. If heater does not run, heater requires repair or replacement.
Heater does
not run.
1. Thermostat set too low.
2. Heater has tripped the power
reset high-temperature control.
3. Heater has tripped the second-
ary over-temperature fuse.
4. Power not on at the main discon-
nect panel.
5. Broken or poorly connected
wire(s) to heater.
6. Defective thermostat.
1. Adjust thermostat to a higher temperature until heater operates (see Prob-
lem #6 if the problem persists).
2. Follow instructions in the “OPERATING INSTRUCTIONS” section for “Re-
setting the Manual Power Reset Limit Control.” If room temperature is below
45˚, see “Reset Heater at the Circuit Breaker” instructions.
3. A severe over-temperature condition has occurred. Repair or replace heater.
4. Turn on the correct circuit breaker in the main disconnect panel.
5. Turn off power at main disconnect panel. Check supply wire continuity and
proper connection to heater wires.
6. The entire heater, or any of its components may be checked for continuity to
determine the cause of any problems. Repair or replace the heater or thermo-
stat.
Maintenance As Needed, or every six months minimum.
1. It is important that you verify power has been turned off and
the heating element is cool before proceeding. Circuit breakers
are often not marked correctly and turning the wrong breaker off
could mean electricity is owing to the heater, even if the heater
does not appear to be working. If you are uncomfortable working
with electrical appliances, unable to follow these guidelines, or do
not have the necessary equipment, consult a qualied electrician.
2. Once you verify the power has been turned off correctly, pro-
ceed to the next step.
3. Remove thermostat knob (if any), screws and take off grill.
4. Wash grill with hot soapy water and dry.
5. While holding fan (to avoid damage or bending), use a hair dryer
or vacuum on blow cycle to blow debris through the top element
(do not touch element).
6. Vacuum fan area without touching the elements.
7. Do not lubricate motor.
8. Replace grill and secure with screws. Replace thermostat knob.
9. Turn thermostat to desired setting.
10. Turn power back on at the main disconnect panel.
©2015 Cadet Printed in USA Rev 12/15 #730021
Page 6
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