Question about Panasonic Microwave Ovens
May also be caused by deterioration of the lightbulb socket resulting in detection of increased resisitance in the light circuit. chack flickering of the bulb to confirm.
Posted on Mar 22, 2012
F33 or F34 codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:
a) Clogged air filter (not applicable to OCS models)
b) Obstruction of the exhaust duct or insufficient ventilation
c) Defective thermal sensor (should read 30 – 70 kohm in room temperature)
d) Grounding of the thermal sensor (possible oxidation)
e) Poor connection (oxidation) at CN4 connector (PRO-1 models only)
f) Poor or no ground at the controller (DPU) board – ensure that all screws securing the board are in place
g) Missing screw(s) that secure the escutcheon to the frame (OCS models only)
h) If all steps above check OK, the error(s) may be caused by defective controller (DPU) board
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Posted on Aug 12, 2008
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