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WARNING
This unit must be serviced by trained and qualified
personnel only. Service by unqualified personnel may lead
to electric shock or burn.
Symptom
Light bulb not working.
Overhead heat is too hot.
Overhead heat is not hot enough.
Base heat is too hot.
Base heat is not hot enough.
No heat, but lights work.
No heat and no lights.
Form No. GRCMWM-1108
Probable Cause
Light bulb loose or defective.
Power Switch turned OFF.
Unit not plugged in or receptacle not
working.
Internal overhead heat temperature
control not working properly.
Internal overhead heat temperature
control not working properly.
Heating element not working.
Excessive air movement around
warming unit.
BASE HEAT control knob set too
high.
Base
heat
thermostat
defective.
BASE HEAT control knob set too low.
Base
heat
thermostat
defective.
Base heating element not working.
Excessive air movement around
warming unit.
Heating elements not working.
Temperature control not working
properly.
Power Switch turned off.
Unit not plugged in or receptacle not
working.
Circuit breaker tripped.
Power Switch defective.
TROUBLESHOOTING GUIDE
ELECTRIC SHOCK HAZARD: Turn the power switch OFF,
unplug the power cord, and allow the unit to cool before
performing any maintenance or cleaning.
Tighten or replace light bulb. Use Hatco P/N
02.30.122.00.
Move Power Switch to "On" position.
Plug in unit, have receptacle repaired by a certified
electrician, or use a different receptacle.
Contact Authorized Service Agent or Hatco for
assistance.
Contact Authorized Service Agent or Hatco for
assistance.
Contact Authorized Service Agent or Hatco for
assistance.
Relocate unit or redirect air movement (i.e. air
conditioning duct or exhaust fan) away from unit.
Replace sneeze guard with optional front access
door assembly to keep heat contained.
Adjust BASE HEAT control knob to a lower setting.
control
Contact Authorized Service Agent or Hatco for
assistance.
Adjust BASE HEAT control knob to a higher
setting.
control
Contact Authorized Service Agent or Hatco for
assistance.
Contact Authorized Service Agent or Hatco for
assistance.
Relocate unit or redirect air movement (i.e. air
conditioning duct or exhaust fan) away from unit.
Replace sneeze guard with optional front access
door assembly to keep heat contained.
Contact Authorized Service Agent or Hatco for
assistance.
Contact Authorized Service Agent or Hatco for
assistance.
Move Power Switch to "On" position.
Plug in unit, have receptacle repaired by a certified
electrician, or use a different receptacle.
Reset circuit breaker. If circuit breaker continues to
trip, contact Authorized Service Agent or Hatco for
assistance.
Contact Authorized Service Agent or Hatco for
assistance.
7
WARNING
Corrective Action
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