• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

    Jake

Magic Chef Microwave, everything works but it does not heat

rte cat

Premium Member
Joined
Nov 25, 2009
Messages
18
Location
Michigan
Model
MCO165UB
Brand
Magic Chef
Age
1-5 years
I have an over the range Magic Chef microwave. Everything on it works
fine, everything sounds normal. It just doesn't heat food.
Does not even warm anything.
Where do I start?
Thanks,
Van
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
33,194
Location
Murray, Utah 84107, United States
Start by checking the voltage going to the transformer or primary supply voltage. Basically, you're dividing the system into two sections, low voltage side and high voltage side. If the primary supply voltage is correct, the problem will be on the high side. If there is no voltage or the incorrect voltage, the problem will be on the low side. More often than not the problem usually ends up being a bad micro switch for the door.
 

rte cat

Premium Member
Joined
Nov 25, 2009
Messages
18
Location
Michigan
Can you give me a little info on how to check the voltage?
Do I have to remove the microwave from the wall?
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
33,194
Location
Murray, Utah 84107, United States
No, you can check it in place but you'll need to recheck your model number for me. Nothing comes up for that one.
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
33,194
Location
Murray, Utah 84107, United States
Unplug the microwave and then remove the top vent so you can access the screw on the top of the control panel. Remove the screw and the control panel will come off. All of the major components can be accessed from there. You'll need a volt/ohm meter to do any testing.
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
33,194
Location
Murray, Utah 84107, United States
Here's the parts diagram for your model: Parts for Magic Chef MCO165UW Microwave

Is everything else appear to be working? In other words, the timer counts down, turntable and lights work etc; etc. Have you checked the door switches for continuity by opening and closing the door? Check the mag tube and TCO on the tube for continuity.
 
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