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Re: light will not shut off
The only thing thing it can be is the light switch, as this is what gives the power to the light bulb.
It sounds like the switch contacts have shorted, thus giving a constant feed to the bulb, If it were me,I would fit a new switch, but to be sure, pull the leads of the switch, and the light should not work.
MAKE SURE POWER IS OFF FIRST!!!!!.
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If the oven won't turn off the oven thermostat is often the cause of the problem. The electrical contacts inside the oven thermostat can weld themselves together and then the oven won't turn off. If this happens, turn off power to the entire appliance at the household circuit breaker or fuse. The oven thermostat usually cannot be tested and must be replaced if defective.
Oven Control Board
The oven control board has a set of relays that turn on and off power to the bake and broil circuits according to the customer settings and sensor input. If the oven won't turn off it could be that one of the relays on the oven control board is shorted closed, providing voltage to the heating circuit. It can be dangerous if the oven won't turn off. Don't leave the oven unattended without turning off power to the oven.
Some ovens are equipped with a relay board. This circuit board has several relays which control the switching of electrical current to the oven heat source. If the oven won't turn off it may be that one or more of the relays on the relay board have failed. If this happens replace the relay board. The relays on the board are not sold separately. ALSO CHECK THE BAKE AND BROIL ELEMENT.
NORMALLY THERE ARE SCREWS TO REMOVE TO ACCESS A PANEL TO REMOVE THE LIGHT BULB. IF THERE ARE NOT, THEN THE EXTERIOR COVER MAY NEED TO BE REMOVED TO ACCESS THE LIGHT BULB. THIS EXTERIOR COVER HAS SCREWS.
MAKE SURE YOUR CIRCUIT BREAKER IS OFF BEFORE YOU TRY TO REPLACE THE BULB.
HI, Sounds like your from the UK If you are referring to a trip switch as being equivalent to an American circuit breaker. (Electrical safety device designed to shut down power to an electrical appliance). Then we are on the same page. Do the following diagnostic procedure: 1 SHUT DOWN THE POWER SUPPLY TO THE OVEN. I.E. THE TRIP SWITCH/CIRCUIT BREAKER. 2 Open the oven door and look very carefully with a flashlight at
the heating element. Look at the the entire element. If
it blew (similar to when a light bulb blows) you will find white
powder around the hole in it or it will be completely broken, or have
bubbles in it. Some indication like that. If so it has failed and
must be replaced. It is probably tripping the switch because it is shorting out somewhere. There is also the possibility that the internal wiring connectors to where the element is mounted into the oven walls is broken off and short circuiting against the oven chassis (walls). That being the case, it may be just a wiring repair in which you install new appropriate electrical contacts and re-connect the element. Hope this helps, Happy New Year, Mark