{"id":17956,"date":"2014-07-19T16:20:02","date_gmt":"2014-07-19T20:20:02","guid":{"rendered":"https:\/\/nuxx.net\/blog\/?p=17956"},"modified":"2014-07-19T16:20:02","modified_gmt":"2014-07-19T20:20:02","slug":"bad-capacitors-in-oven-controls","status":"publish","type":"post","link":"https:\/\/nuxx.net\/blog\/2014\/07\/19\/bad-capacitors-in-oven-controls\/","title":{"rendered":"Bad Capacitors in Oven Controls"},"content":{"rendered":"<p><a href=\"https:\/\/nuxx.net\/gallery\/v\/aroundthehouse\/various_bits\/IMG_8000.jpg.html?g2_imageViewsIndex=2\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" title=\"Failed Nichicon electrolytic capacitors removed from the Maytag stove\/oven in the kitchen.\" src=\"https:\/\/nuxx.net\/gallery\/d\/106202-2\/IMG_8000.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/a><\/p>\n<p>The oven at home was purchased around the same time this place was built, back in 1991. Ever since I purchased it in 2001 the temperature\u00a0has skewed a bit from the\u00a0chosen setting, but within the past couple of years it&#8217;s become noticably worse, with a ~100\u00b0F offset at the high end of the scale. This made things difficult when Danielle would want to bake bread or other things which required high temperatures.<\/p>\n<p>This morning I finally got around to taking the oven apart and\u00a0looking at the controller. On the board I found four failed <a href=\"https:\/\/en.wikipedia.org\/wiki\/Electrolytic_capacitor\">electrolytic capacitors<\/a>, all of which tested\u00a0bad (infinite reading on a multimeter). Using spares from\u00a0the pile of parts gathered during previous electronics projects and a lucky purchase at Radio Shack I was able to replace all four of these and get the oven going again. Initial testing shows that things are working better. With\u00a0the oven set to 375\u00b0F I&#8217;m seeing the\u00a0oven\u00a0(measured with a Fluke multimeter and temperature probe in the air) fluctuating between ~350\u00b0F and ~380\u00b0F, which seems about right.<\/p>\n<p>The failed parts are as follows: 2x 47\u03bcF 25V (C3, C13), 2x 4.7\u03bcF 35V (C9, C10). These were originally <a href=\"http:\/\/www.nichicon.co.jp\/\">Nichicon<\/a>\u00a0parts, but I failed to write down the replacement brands. The 47\u03bcF replacements are\u00a0Radio Shack generics, and the 4.7\u03bcF\u00a0are something cheap but decent that I&#8217;d picked up from Mouser a few years ago.<\/p>\n<p>Total out of pocket cost was $3.16, which is very high for two capacitors, but\u00a0ordering two capacitors online isn&#8217;t worth the shipping cost, and these were available immediately. The only other cost was 4-5 hours of work disassembling the stove, the PCB stack, finding the bad capacitors, and getting replacements.<\/p>\n<p>I&#8217;m glad this was fixable myself. Paying someone to fix it would have involved replacing the entire failed control module ($200+ if still available + labor). Or, if I could even find one myself, replacing the whole control module itself would have been an expensive crapshoot: what if it was something else? Simply replacing the stove would have cost near-$1k for something comparably nice.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The oven at home was purchased around the same time this place was built, back in 1991. Ever since I purchased it in 2001 the&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/nuxx.net\/blog\/2014\/07\/19\/bad-capacitors-in-oven-controls\/\">Continue reading<span class=\"screen-reader-text\">Bad Capacitors in Oven Controls<\/span><\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-17956","post","type-post","status-publish","format-standard","hentry","category-around-the-house","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/17956","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/comments?post=17956"}],"version-history":[{"count":2,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/17956\/revisions"}],"predecessor-version":[{"id":17958,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/17956\/revisions\/17958"}],"wp:attachment":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/media?parent=17956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/categories?post=17956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/tags?post=17956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}