HALF-SIZE CONVECTION OVENS - ELECTRICAL OPERATION
38
TROUBLESHOOTING

ELECTRIC OVENS

SYMPTOM POSSIBLE CAUSES

No power to oven controls. 1. Main breaker open.
2. Control circuit fuses open.
3. 12/6 volt transformer inoperat ive. (Electronic
control)
No oven operation; power to controls. 1. Door switch open.
2. Temp. control malfuncti on.
Blower motor operates when oven is heating, but not
in cooldown. 1. Cooldown switch inoperative (solid state
control).
Blower motor does not operate, oven heats. 1. Door switch open or inoperative.
2. Speed selection switch malfunction.
3. Blower motor inoperative.
4. Solid state relay malfuncti on. (Electronic
Control)
5. Electronic control inoperativ e. (Electronic
Control)
Oven is slow to heat or not hot enough. 1. Incorrect line voltage.
2. One phase of 3 phase out.
3. Thermostat or control malfunct ion.
4. Blower motor inoperative.
5. Contactor malfunction.
6. Temperature probe malfunction.
Oven temperature is too hot. 1. Thermostat or control not calibrated.
2. Thermostat or control malfunct ion.
3. Contactor inoperative.
No heat; blower motor operates. 1. Thermostat or control inoperativ e.
2. Contactor malfunction.
3. Heaters open.
Electronic control does not function. 1. See "ELECTRONIC CONTROL" in "SERVICE
PROCEDURES AND ADJUSTMENTS".
Door does not seal or will not shut properly. 1. Doors out of adjustment.
2. Door seals inoperative.
3. Door catch malfunction.