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I turned the oven on and it blew the switch and the fuse, then I replaced them and it blew the fuse again. I have replaced the switch before with no problem.what should I do to fix this?

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Here's what you do.... and it's really this simple. Lets think about this simple. Check the fuse rating after removing all power from the unit and write it down. Next remember this fornula P=IV, thats Power=Current*Voltage. Now what we are looking for is something that would give us a large spike in power......so, we look for somewhere there is very high current or voltage.......but since we want to do this the safe way and without destroying the appliance in the process, we will remember another formula... V=IR, or Voltage=Current*Resistance. So now we can look for signs of extreme resistance as well. (when there is no resistance, that means there are no components between or connected to those two points an a way that would draw any power.....This is what is normally referred to as an arc.You can also have a number approaching infinity, so since your meter wont read that high, you'll see three EEEs. Now, connected the possitive and negative leads of the ohm meter (or multi meter set to read resistance) and take a reading.......then flip the switch and note the change.......you should have a reading much lower with the switch in the off possition.......if you resistance increases to the EEE mark, then you have a internal circuit problem and need to use the same concept to check the internal components. Remember your math rules, as they will decide whether you pass or fail this test........ but to make things easier, ill break down all the formulas for you


for P=I(current)V I=P/V V=P/I
V=IR I=V/R R=V/I Use these quick references to double check the readings and protect not only your appliaces and home, but your family.....you cannot continue to toy with high voltage appliance without recourse. take your time and be confident in your repairs....the only way is to be thorough and take notes and do your homework. A blown breaker means somewhere the resistance is sky rocketing. May just be an exposed wire or a board component burnt up......look for gray or black burn marks on or near components. Its may be in your best interest to simple locate and replace the main control board.....if you think will be your route pls let me know by responding to my post with your model number and ill shoot you a few good links for OEM repair parts

Posted on Mar 23, 2011

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