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Probable causes are:
1. Defective or improperly
installed high-limit
2. Defective heating or
latching Contactor
Probable causes are:
1. Defective heating contactor
2. Defective heating element
3. Broken or defective wiring
connection
4. Improper wire connection
Condition normal
Do elements heat and draw
proper amps?
Do elements continue to heat and
maintain proper temperature (including
during warm-up (melt) cycle?
What are the
symptoms?
Unit heats until
high-limit trips
without
HEATING MODE
indicator lit.
Unit heats until
high-limit trips
with HEATING
MODE indicator
lit.
Unit stops
heating with
HEATING MODE
indicator lit.
Probable causes are:
1. Defective heating element
2. Defective heating contactor
3. Improperly-wired element
Probable causes are:
1. Defective (shorted) probe
2. Defective probe circuit
3. Defective computer
NO
YES
YES
NO
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