An expert who has written 20 answers of more than 400 characters.
An expert who has answered 20 questions.
Re: XL1800 Microwave Problem
A LOUD ticking sound could very well be a High Voltage Arc. This is usually caused by a breakdown of insulation on High Voltage Wires, or components. It can also be arcing between the door frame and the cavity. Usually where the bottom of the cavity floor meets the door frame. Indication of this will be small areas on the door where it looks like the paint has been chipped off, but if you look close you will see it is small burned marks. Another area is the Splatter Shield located inside and at the top. It looks like a Plastic Cover. It is not plastic, but a fiber material. Grease, and food will get trapped on and under this Splatter Shield. Over a period of time the grease and food particles will break down from being cooked over and over again. They will then form Carbon. Which will Arc when Microwaves are present. Remove Push-Pins holding Splatter Shield. Clean by washing with dish detergent . If burned (arc) spots are still present after washing, replace Splatter Shield or arcing will continue. Once Carbon has burned through, it will continue to burn.
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There are two things that come to mind, the magnetron is starting to fail, or the strapping has come loose on the fan motor housing, unplug microwave oven and remove top, [several screws] carefully inspect the fan for any loose mounts and tighten.
no this is the magnetron do not plug the unit in or turn the unit on or you will be seeing alot more then pretty lights this has become a fire hazard and it would be up to you on replaceing the magnetron in your unit preferably consider the cost of the unit compared to the cost of the magnetron they usually run over 100.00 just for the piece if you have any further questions message me back and please remember to rank how this opinion has helped it allows me to help others in similar situations Thanks Rick
Thanks for using FixYa. If it’s a loud hum/buzz sound then 90% it’s usually a bad magnetron and other times it’s a bad high voltage diode. However, from what you have described it seems to be the magnetron. Please do rate the solution if the issue is resolved or post a comment for further assistance.
you say it has aloud hum to it? And everything works but no heat.Im going to give you a list of things it could be and you'll have to take microwave apart to do the work. Beforre you start get some small trays or pill bottles to put screws in. Make sure when you take a screw out you know where it goes back because all the screws may not be same length. First, You may have a blown fuse in the HV transformer primary circuit, The HV transformer is the largest thing you'll see when you take the cabinet of the frame.Second,bad connections for the magnetron filament the magnetron will have what looks like fins or louvers around it.look for bad wire connections. Third, could be a faulty thermal protector or fuse, More than likely its either going to be the HV transformer or the magnetron thats bad.
Use a hair blow dryer to dry out the underside of the microwave. After you are convinced that it is dry you may operate it again.
That said, if it still is acting up read this:
When the microwave sounds okay, but there's no heat, one of the internal door switches, the high voltage circuitry, or the circuit board may have a problem. To resolve this problem, you need the assistance of a qualified appliance repair technician.
Sounds like the bottom bearing has siezed. This is then rotating on it's mountings instead of nice ball bearings.
Just check it's not simply any support wheels you can easily get to.
It is possible to access this from inside. If you wish to repair it, unplug, and remove case screws. The drive assembly is easily visable from underneath. If you can get the main bearing off, clean it in parafin or WD40 and use a little light oil on it.
Make sure you replace the case properly - with all screws before attempting to start again.
The microwave generator is only active when electricity is applied, and usually the door assembly is integral to the microwave chamber.
The second problem is probably defective door switches, or it may be a problem with the control panel, which we repair nationwide for only $32.50.
On my Web site, I have info on safety, disassembly, and diagnosing and replacing door switches: http://tinyurl.com/yzjozk
Running it empty has damaged the magnetron. It will work for a while, but it will eventually have to be replaced. A good parts source is here: http://tinyurl.com/gv383
Your turntable motor is shot. It's simple to remove and replace. you don't even have to take the microwave out of the shelf. To remove it take out seven screw around the perimeter of the bottom. Lift up on back of bottom to get over clips on the back. Remove the two screws holding the motor in and detach the plug. Find a electrical repair shop for you make pick it up and replace it. When replacing it take out plate and hold plate key down and align flat side of shaft on motor with the plate key.