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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 inoperative. (Electronic
control)
No oven operation; power to controls. 1. Door switch open.
2. Temp. control malfunction.
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 malfunction. (Electronic
Control)
5. Electronic control inoperative. (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 malfunction.
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 malfunction.
3. Contactor inoperative.
No heat; blower motor operates. 1. Thermostat or control inoperative.
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.