Electric Heater; Table 14.5: Electric Heater - Addison RC/FC Series Installation Operation & Maintenance

Table 14.5: Electric Heater

Problem
No Heat
Not Enough Heat
Heater Cycling on
Automatic
Limit
Open Secondary
Protective
Device
Contactor Chatter
Element Failure
Probable Cause
No call for heat
No power and control voltage to heater
Faulty component
Faulty component
Heat anticipator current draw too low,
causing short cycling
Improper airflow
Faulty temperature limit switch
Stuck contactor
Improper wiring
Insufficient transformer capacity
Corroded hardware and/or loose
connections
RC/FC Series Installation, Operation, and Maintenance Manual
Check that the controls are set to call
for heating
Check that heater has power and
control voltage
Check components with continuity meter,
replace as necessary
Check ampere draw is reasonably close
to that on the heater data plate If more
than 10% short, begin testing individual
components, replace as necessary
Check current draw
Check for obstructions to return air, loose or
broken fan belt and clogged filters and/or
evaporator coils
Test and, if necessary, replace
Check contactor
Check wiring
Check transformer
Check hardware
Solution
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