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 authorized service repre-
sentative.
*CONSULT LOCAL ELECTRICAL CODES TO DETERMINE WHAT WORK MUST BE PERFORMED BY QUALIFIED
ELECTRICAL SERVICE PERSONNEL.
Heater is work-
ing, but room
does not reach
desired tempera-
ture.
1. Heat loss from room is greater than heater
capacity.*
2. Furniture or other surfaces may be too close to
the heater.
3. Verify if temperature lock has been set.
Thermostat setpoint is 40˚F-86˚F (4.4˚C-30˚C).
1. Close doors and windows. Provide additional insulation, or install a higher wattage
heater or multiple heaters if necessary. (If your circuit breaker is rated for more
capacity.)
2. Remove furniture or other surfaces to appropriate clearances, so air can flow freely
throughout room. Maintain a minimum distance of ¾ inches (1.9 cm) from adjacent
surfaces, 4½ inches (11.4 cm) from the floor, and 3 feet (0.9 m) from furniture or other
objects placed directly in front of the heater.
3. See “MAX/MIN TEMPERATURE LOCK” on page 6.
Breaker trips
immediately
upon energizing
heater.
1. Overloaded circuit.*
2. A short circuit exists in the supply or heater
wiring.*
3. Defective circuit breaker.*
4. Thermostat malfunction.
1. 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.
2. Broken or poorly connected 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.
3. Replace the circuit breaker.
4. Replace heater assembly.
Heater fan op-
erates, but does
not discharge
warm air.
1. Mode button is not set to HEAT mode.
2. Element has failed.*
1. Push mode button to HEAT mode (display shows room temperature).
2. Replace element.
Heater will not
shut off.
1. Heater continues to run at low speed.
2. Heat loss from room is greater than heater
capacity.*
3. Thermostat is not functioning properly.
1. If room temperature is being regulated and maintained, a low fan speed and low
heat output is normal for this energy saving heater.
2. Close doors and windows. Provide additional insulation, or install a higher wattage
heater or multiple heaters if necessary. (If your circuit breaker is rated for more
capacity.)
3. Replace heater assembly.
Heater discharg-
es smoke or
emits a burnt
odor.
1. Dust, lint or other matter has accumulated inside
heater.
2. Poor or loose electrical connections.
1. Clean heater (See “MAINTAINING YOUR HEATER” section for instructions).
2.Turn off power at circuit breaker. Inspect all supply and heater wires for loose or
poor connections. Secure or reconnect all loose connections. Do not reset circuit
breaker until all connections have been checked or repaired.
Element heats
for a moment
without the fan
turning, then im-
mediately stops
heating.
1. Defective motor or internal connection.*
2. Fan is jammed.
1. Heater or fan motor requires replacement.
2. Remove obstruction and confirm that fan is spinning freely. Press manual reset
temperature limit button per the “OPERATING INSTRUCTIONS” section.
Heater does not
run.
1. Thermostat is set too low.
2. Mode button is set to “FAN ONLY” at ‘0’ setting.
3. Heater has tripped the manual reset
temperature limit.
4. Power not on at the circuit breaker.
5. Broken or poorly connected wire(s) to heater.
6. Defective thermostat.
7. Circuit breaker not installed correctly.
1. Adjust thermostat to a higher temperature until heater operates (See Problem #6 if
the problem persists).
2. Push mode button to “HEAT” mode.
3. Press the manual reset button (See “OPERATING INSTRUCTIONS” section).
4. Turn on the correct circuit breaker in the main disconnect panel.
5. Turn off power at circuit breaker. Check supply wire continuity and proper
connection to heater wires.
6. Repair or replace the heater assembly.
7. Correct the circuit breaker installation.
Heater contin-
ually trips the
manual reset
temperature limit
control.
1. Dust, lint or other matter has accumulated inside
heater.
2. Airflow is blocked.
3. Fan or motor is jammed.
4. None of the above.
1. Clean heater (See “MAINTAINING YOUR HEATER” section for instructions).
2. Remove obstruction. Maintain a minimum distance of ¾ inches (1.9 cm) from
adjacent surfaces, 4½ inches (11.4 cm) from the floor, and 3 feet (0.9 m) from furni
-
ture or other objects placed directly in front of the heater.
3. Remove obstruction, and press heater manual reset button (See “OPERATING
INSTRUCTIONS” section).
4. Replace heater assembly.
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 flowing 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 qualified electrician.
2. Once you verify the power has been turned off correctly,
proceed to the next step.
3. Remove 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.
9. Turn power back on at the main disconnect panel.
©2015 Cadet Printed in USA Rev 11/15 720065
Page 8