Question about KitchenAid KBMS1454RSS Microwave Oven

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Hello sirs l have an kitchenAid microwave kbms1454sss-3 with no power or no display like new l check fuse is ok,the unit come with 2 small print board with atmega chip on it please l need info what the problem is

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  • h_karso Nov 13, 2010

    thank you



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Most often when a MW oven will not go, it is to do with the Magnetron and or the High voltage Diode breaking down under load, and or the power supply.
The absence of any indication of power also indicates a problem with the internal power supply, either the fault, has caused the power supply's protection circuitry to shut it down, or the fault has caused the Power Supply to fail as well. It's not really possible to tell until one actually investigates inside the unit.
MW's are very dangerous to service and these especially are best left to the professionals.
You need to contact the KitchenAid head or local office, and ask for a referral to an authorised service center, now when here, ask for a 'Quote" for the repair before allowing any repair work to proceed. this way you can make an informed decision as to repair or replace, as with many repairs, it can all quickly add up.

Posted on Nov 11, 2010


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Hello :

Maybe there's a problem with the power transformer or the power PCB [ Printed circuit board ] . Or it could be just a fuse . You need to check first . If it's the fuse , then that will be easy to solve , you need only to replace it with new one . But if the problem is with the transformer or with the PCB , you need to take your microwave to the service for repairing .

To locate the fuse, remove the outer cabinet of the unit, which is usually held in place with a few screws. Once the outer cabinet is removed, follow the power cord into the unit. It will take you to the fuse holder, where the fuse sits. The fuse holder is located two or three inches into the unit, and may be attached to a power board .

CAUTION: Your microwave oven is capable of giving you a serious electrical shock, even when it is unplugged. I strongly suggest you seek the assistance of an appliance repair technician when conducting any microwave oven repair .

good luck .

please rate !

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Hello :

Problem with the power transformer or the power PCB . Or it could be just a fuse . You need to check first . If it's the fuse , then that will be easy to solve , you need only to replace it with new one . But if the problem is with the transformer or with the PCB , you need to take your microwave to the service .

You could check for manual here :

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1. Unplug microwave oven or disconnect power.
2. Replace the user interface board (UIB).
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Many of the error codes may be solved by power cycling: unplug microwave oven or
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i found this info on a tech sheet hope this helps, let me know how it goes... some of those electronics had 5 year parts warranty i would check that out....Also u might be better of buying a new one if its out of warranrty as some of those boards are expensive, obvioulsy unplug unit first try to reset it self.

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