{"id":1007,"date":"2023-01-25T06:31:59","date_gmt":"2023-01-25T06:31:59","guid":{"rendered":"https:\/\/help.noritz.com\/?post_type=ht_kb&#038;p=1007"},"modified":"2024-11-21T19:26:21","modified_gmt":"2024-11-21T19:26:21","slug":"errorcodec1premix","status":"publish","type":"ht_kb","link":"https:\/\/help.noritz.com\/index.php\/knowledge-base\/errorcodec1premix\/","title":{"rendered":"Error Code C1 (premix model)"},"content":{"rendered":"\n<p>Troubleshooting for abnormalities due to Scale Build-up<\/p>\n\n\n\n<p>C1#<\/p>\n\n\n\n<p>If the alarm code \u201cC1#\u201d is flashing on the display window, it means there is scale build-up in the heat exchanger. Damage to the water heater due to scale build-up is not covered by the water heater\u2019s warranty. To prevent damage to the heat exchanger from scale build-up, the heat exchanger needs to be flushed to remove the scale build-up. To clear the alarm code \u201cC1#\u201d, the heat exchanger must be flushed.<\/p>\n\n\n\n<p><br>To resolve this issue, you need to follow the troubleshooting steps below.<br>This procedure is only intended to be performed a qualified service professional or authorized Noritz service representative.<br>Any unauthorized performance of this procedure may not be covered by the Noritz America Limited Warranty.<br>If the alarm code \u201cC1#*\u201d is displayed and flashing on the display window, contact Noritz America (1-866-766-7489).<\/p>\n\n\n\n<p>*Warning indication, # = 1-9<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"653\" src=\"https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-1024x653.png\" alt=\"\" class=\"wp-image-1482\" srcset=\"https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-1024x653.png 1024w, https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-300x191.png 300w, https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-768x490.png 768w, https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-50x32.png 50w, https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-60x38.png 60w, https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1-100x64.png 100w, https:\/\/help.noritz.com\/wp-content\/uploads\/2023\/01\/image-1.png 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong><strong>For further technical assistance call 866-766-7489 or use our <a href=\"https:\/\/contractorfinder.noritz.com\/contractors?installer=false&amp;servicer=true\" target=\"_blank\" rel=\"noreferrer noopener\">Contractor Locator<\/a> to find a local service representative.<\/strong><\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Troubleshooting for abnormalities due to Scale Build-up C1# If the alarm code \u201cC1#\u201d is flashing on the display window, it means there is scale build-up in the heat exchanger. Damage to the water heater due to scale build-up is not covered by the water heater\u2019s warranty. To prevent damage to&#8230;<\/p>\n","protected":false},"author":1,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[26],"ht-kb-tag":[28,143],"class_list":["post-1007","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-error-codes","ht_kb_tag-errorcodes","ht_kb_tag-premix"],"_links":{"self":[{"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/ht-kb\/1007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/comments?post=1007"}],"version-history":[{"count":2,"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/ht-kb\/1007\/revisions"}],"predecessor-version":[{"id":1483,"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/ht-kb\/1007\/revisions\/1483"}],"wp:attachment":[{"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/media?parent=1007"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/ht-kb-category?post=1007"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/help.noritz.com\/index.php\/wp-json\/wp\/v2\/ht-kb-tag?post=1007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}