{"id":4740,"date":"2020-10-02T17:36:18","date_gmt":"2020-10-02T23:36:18","guid":{"rendered":"https:\/\/ddmgaragedoors.com\/blog\/?p=4740"},"modified":"2023-06-22T15:26:52","modified_gmt":"2023-06-22T21:26:52","slug":"troubleshooting-photo-eyes-on-a-liftmaster-operator","status":"publish","type":"post","link":"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/","title":{"rendered":"Troubleshooting Photo Eyes on a LiftMaster Operator"},"content":{"rendered":"\n<p><a href=\"https:\/\/ddmgaragedoors.com\/parts\/garage-door-opener-eyes.html\">Photo eyes<\/a> keep garage doors from injuring people. They detect objects that would obstruct the door as it closes. However, a malfunctioning photo eye may keep the door from closing at all.<\/p>\n\n\n\n<p>Often when a garage door will open but not close, the cause is a misaligned eye or a broken wire. On residential doors with <a href=\"https:\/\/ddmgaragedoors.com\/parts\/liftmaster-residential-openers-and-accessories.html\">LiftMaster openers<\/a>, the quickest test is to check the photo eyes on both sides. If both lights are on, the eyes should be in working order. Sometimes, however, one eye will flicker, and the eye will need to be realigned.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/10\/Troubleshooting-Photo-Eyes-on-a-LiftMaster-Operator.jpg\" alt=\"Functioning photo eye on a commercial sectional door with a LiftMaster operator.\" class=\"wp-image-4805\" width=\"544\" height=\"282\"\/><figcaption class=\"wp-element-caption\"><strong>Functioning photo eye on a commercial sectional door with a LiftMaster operator.<\/strong><\/figcaption><\/figure>\n\n\n\n<p>There is another way for you to troubleshoot photo eyes on a LiftMaster Operator. You can do this by checking the lights on the <a href=\"https:\/\/youtu.be\/un_WOtwN3qE\">control board<\/a>, as explained in the video below.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Troubleshooting Photo Eyes on a LiftMaster Operator\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/s8T1zArQ04U?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>On the operator&#8217;s control board, the <a href=\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/23\/troubleshooting-liftmaster-operator-error-codes\/\">light marked LMEP will start flashing<\/a> if the photo eyes are malfunctioning or disconnected. This is the simplest way to troubleshoot photo eyes.<\/p>\n\n\n\n<p>For a simple solution to sun-related photo eye malfunctions, see <a href=\"https:\/\/ddmgaragedoors.com\/blog\/2010\/09\/27\/how-to-fix-problems-with-garage-door-opener-photo-eyes-a-surprising-idea\/\">this post<\/a>. Other possible solutions include realigning the eyes or fixing broken wires. If the eye continues to malfunction, you may need to <a href=\"https:\/\/ddmgaragedoors.com\/parts\/garage-door-opener-eyes.html\">replace it<\/a>.<\/p>\n\n\n\n<p>We also have a blog post with instructions on <a href=\"https:\/\/ddmgaragedoors.com\/blog\/2018\/03\/23\/omron-photo-eye-installation\/\">how to install Omron Photo Eyes<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Photo eyes keep garage doors from injuring people. They detect objects that would obstruct the door as it closes. However, a malfunctioning photo eye may keep the door from closing at all. Often when a garage door will open but not close, the cause is a misaligned eye or a broken wire. On residential doors [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[247,5],"tags":[3986,288,254],"class_list":["post-4740","post","type-post","status-publish","format-standard","hentry","category-products","category-technical-support","tag-liftmaster","tag-photo-eyes","tag-troubleshooting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v25.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Troubleshooting Photo Eyes on a LiftMaster Operator - DDM Garage Doors Blog<\/title>\n<meta name=\"description\" content=\"If a door&#039;s photo eyes are not functioning properly, it might prevent the door from closing. There are two ways to troubleshoot photo eyes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Troubleshooting Photo Eyes on a LiftMaster Operator\" \/>\n<meta property=\"og:description\" content=\"If a door&#039;s photo eyes are not functioning properly, it might prevent the door from closing. There are two ways to troubleshoot photo eyes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/\" \/>\n<meta property=\"og:site_name\" content=\"DDM Garage Doors Blog\" \/>\n<meta property=\"article:published_time\" content=\"2020-10-02T23:36:18+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-22T21:26:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/10\/Troubleshooting-Photo-Eyes-on-a-LiftMaster-Operator.jpg\" \/>\n<meta name=\"author\" content=\"Dan Musick\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dan Musick\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/\",\"url\":\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/\",\"name\":\"Troubleshooting Photo Eyes on a LiftMaster Operator - DDM Garage Doors Blog\",\"isPartOf\":{\"@id\":\"https:\/\/ddmgaragedoors.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/ddmgaragedoors.com\/blog\/2020\/10\/02\/troubleshooting-photo-eyes-on-a-liftmaster-operator\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/ddmgaragedoors.com\/blog\/uploads\/2020\/10\/Troubleshooting-Photo-Eyes-on-a-LiftMaster-Operator.jpg\",\"datePublished\":\"2020-10-02T23:36:18+00:00\",\"dateModified\":\"2023-06-22T21:26:52+00:00\",\"author\":{\"@id\":\"https:\/\/ddmgaragedoors.com\/blog\/#\/schema\/person\/6b44055c953f4d8e99a57a40629a35c8\"},\"description\":\"If a door's photo eyes are not functioning properly, it might prevent the door from closing. 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