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The Troubleshooting section is intended to aid in defining and correcting possible service problems. When using
the chart, select the problem category that resembles the malfunction. Then proceed to the possible causes
category and take necessary corrective action.
Problem
Possible Causes
Corrective Action
The power switch light does not
The furnace is not connected
Check furnace connection to
illuminate.
to power supply.
power supply.
No display on Single Set Point
ON and OFF power switch
Replace power switch.
Control
defective.
The furnace does not heat.
No power.
Check power source and fuses
or breakers.
Thermocouple is open or
Replace thermocouple or check
thermocouple leads reversed.
thermocouple connections.
Controller malfunction.
Verify and correct all parameters
and configuration values.
If “malfunction” persists, replace
control.
Element burned out.
Replace element.
Solid state relay defective.
Replace solid state relay.
Chamber section not connected
Reconnect chamber section to
to base.
base.
Slow heatup.
Low line voltage.
Install line of sufficient size and
proper voltage. (Isolate furnace
from other electrical loads.)
Heavy load in chamber.
Lighten load in chamber to
allow heat to circulate.
Wrong heating element.
Install proper element.
Low SPrr setting.
Increase setting.
T
ROUBLESHOOTING
