Repair manual

MT3855
6
POSSIBLE CAUSE(S) SUGGESTED REMEDY
Symptom #3 - Hood system does not operate when oven is on
 Fan exhaust/supply problem.
 Defective interlock circuit.
 Contact HVAC service.
 Replace auxiliary contactor.
Symptom #4 - Blower motor running backward
 Motor off by thermal overload (other fans forcing
blower to spin).
 Faulty capacitor.
 Determine if the cooling blower (or fans) are operĆ
ating. If not, verify voltage to the cooling blower.
If voltage is present, replace the cooling blower
motor. If voltage is not present, verify voltage
through the thermal switch. If no voltage is presĆ
ent, replace the thermal switch.
 Replace capacitor.