35
T
ROUBLESHOOTING
Slow heatup.
Low line voltage.
Install line of sufficient size and
proper voltage. (Isolate furnace
from other electrical loads.)
Wrong heating element.
Install proper element.
Heating element burned out.
Replace element.
Heavy load in chamber.
Lighten load in chamber to
allow heat to circulate.
Repeated element burnout.
Overheating furnace.
Keep furnace under maximum
temperature. Closer supervision
of control setting.
Heating harmful materials.
Enclose material in container.
Clean up spills in and on
chamber. Ventilate chamber by
leaving top vent slightly open
when heating known harmful
reagents.
Contamination present from
Replace insulation material.
previous burnout.
Inaccurate temperature readout.
Oxidized or contaminated
thermocouple.
Replace thermocouple.
Poor thermocouple connection.
Tighten connections.
Improper loading procedures.
Use proper loading procedures.
Poor ventilation of control.
Clear area around furnace
control.
Thermocouple connections
reversed.
Reconnect thermocouple
correctly.