Question about Samsung Microwave Ovens
Samsung microwave smh7178
punch in time to microwave but pressing Start button won't turn on microwave on. Unplug microwave, wait a few minutes, set clock and then start over with entering time and pressing start button but microwave won't turn on.
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Posted on Jan 02, 2017
SOURCE: Microwave quit
I would suspect either door switches or an intermittent control circuit board, either of which can be repaired. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure over time. I have a text file on my site called "doorsw.txt" which helps in diagnosing and repairing door switch problems. You can find the file via a Google search. It will help you check and replace the door switches if you or an able friend is so inclined. In some cases, the problem is a bad connection or a bad relay on the control board. That's something we see fairly often, and we repair them for only $32.50 nationwide.
Posted on Oct 12, 2006
PLEASE CHECK IF DOOR IS CLOSED PROPERLY THOSE HOOKS ON THE DOOR ACTIVATE SWITCHES ON THE INSIDE OF MWAVE OPEN COVER AND CHECK IF HOOKS ARE MAKING CONTACT WITH SWITCHES .COULD ALSO BE TOUCHPAD FAULT YOU WILNEED A TECH
Posted on May 09, 2007
Sadly, we hear of this over and over.
This is usually due to a defective or loose magnetron causing electrical interference and disruption in the control circuit board.
If your magnetron was recently replaced, it may have loose mounting nuts or bolts or maybe the wire mesh RF gasket was not installed or got pinched.
It may also need a new high-voltage diode and stirrer, and the cavity may be affected.
GE had a campaign (but not a recall, mind you!) covering several models.
Details are in their bulletin at http://220.127.116.11/mwd/ge_mw_mag_kit_bulletin.pdf
Even if your model is not on the list, the same problem can occur, requiring a kit. I just think the difference is that GE has stopped paying for the repairs.
The parts kit (that GE used to pay for) is part # WB27X10489 and is shown here: http://18.104.22.168/mwd/wb27x10489_ge_mag_stir_kit.jpg
If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
There should also be a very helpful "mini-manual" hidden inside the unit behind the control panel. It's very helpful when troubleshooting.
You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Mar 02, 2008
After a bit of digging, it appears to be an issue with the door not being closed correctly (or at least the it thinks is isn't.
I know its a different model but the functionality is identical...
Posted on Jun 12, 2008
Replace the fuse with a ceramic fuse from Home depot! costs less than $3 and it will fix the problem. I had all the same problems as everyone else, you name it my microwave had it! you must remember replace it with a ceramic fuse! not a glass one. I know people say its the switchboard and all that nonsence but I promise you, the fuse plays a majoe roll in the microwave not working properly. Even though it doesnt look broken, a junky fuse can cause your appliance to do very strange things. I replaced mine 6 months ago and it works like its fresh out of the box.
Posted on Apr 29, 2009
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