Question about Microwave Ovens
Within 2 seconds of "Start" my Kenmore model 721.8943580, manufactured 8/90, beeps, stops, light goes out, and LED display reads "Prob." "Clear", reentry and "Start" bring same error. If hours or a day go by before restart, the unit runs fine for up to a minute or more before shutdown and "Prob" indication reoccurs. Then, an immediate attempt to run the unit again results in the same condition in 2 seconds.
I use this old unit, otherwise in top condition, only for heating water for tea. Spending big money on repair doesn't make sense. Could the fix be as simple as a cleaning? I've replaced bulbs and belts in MW ovens and I'm an experienced do-it-yourselfer with complex appliance and other repairs.
I would bet that the temperature probe socket has some accumulated grease, etc. in it which may be changing the resistance of the contacts, making the control board think the probe is installed but defective.
First, please unplug the oven before you investigate.
The best idea is to clean the probe socket contacts.
You'd need to remove the outer cover, and the probe socket should be located on the right side of the chassis.
If you can cut thin strips of fine sandpaper and work them back and forth between the contacts, that's the best way.
You can plug & unplug the probe while observing the socket to see how the contacts work.
Your socket may be sealed, and that would possibly require you to carefully take it apart. That's a bit of a gamble, as it may crack due to age.
Another idea is to take a wad of paper toweling, hold it with your right hand over the back of the probe socket, and spray contact cleaner or WD40, etc. into the opening of the probe jack from inside the oven cavity with your left hand.
Then plug & unplug the probe several times, wipe any spills and try the oven again.
If the probe unplugs form the control board, you could disconnect it and try the oven.
Let me know how it goes.
Posted on Aug 02, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 03, 2015 | Kenmore Microwave Ovens
on Jun 16, 2009 | Kenmore 60654 Microwave Oven
Aug 07, 2014 | Kenmore Microwave Ovens
Aug 19, 2012 | Kenmore 80809 Microwave Oven
Sep 08, 2010 | Kenmore 63792 Microwave Oven
Aug 21, 2009 | Kenmore 63792 Microwave Oven
Oct 24, 2008 | Kenmore 63672 Convection/Microwave Oven
Aug 21, 2008 | Microwave Ovens
Mar 01, 2008 | Kenmore 62622 Microwave Oven
Feb 25, 2017 | Microwave Ovens
318 people viewed this question
Usually answered in minutes!