Bosch HBL 73 Service Manual page 41

Tuesday, June 18, 2002
BOSCH 700 SERIES:
ELETTRODOMESTICI
SERVICE INSTRUCTIONS FOR OVEN TESTING AND BASIC TROUBLESHOOTING
VIA CHECCHI 98
I 21013 GALLARATE
ITALY
F45 UPPER OR SINGLE OVEN LATCH
BOTH LOCKED AND UNLOCKED.
F46
LOWER OVEN LATCH BOTH
LOCKED AND UNLOCKED.
F111 UPPER OR SINGLE OVEN 650°F
RUNAWAY CONDITION
3. Check connections between P10 connector and the latch motor.
4. Replace Power Board.
1. Check connections between P4 connector on the Power Board and the latch
switches.
2. Ensure door latch switches are operating properly.
3. Check connections between P10 connector on the Power Board and the latch
motor.
4. Replace Power Board.
1. Check P24 connector on the Power Board.
2. Ensure door latch switches are operating properly.
3. Check that neither latch switch nor common wires are pinched to the appliance
chassis.
4. If F46 persists, replace Power Board.
1. Oven too hot. Allow oven to cool down <650°F before turning power on.
2. Bad RTD sensor or bad connection. Check P4 connector on the Power Board.
3. Unplug the upper (or single) oven sensor connector and check sensor resistance
(approximately 1080 ohms at room temperature with connector removed).
4. Check wiring to heating element. If OK, replace Power Board.
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