{"product_id":"wine-guardian-defrost-sensor-39h0040-02","title":"Wine Guardian Defrost Sensor 39H0040-02","description":"\u003cdiv class=\"wgd-acc-page\"\u003e\n\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\n\u003cspan class=\"wgd-eyebrow\"\u003eControls \u0026amp; Switches\u003c\/span\u003e\u003ch2 class=\"wgd-product-title\"\u003eFreeze-Protection Sensor for Units Running the Current Remote Interface\u003c\/h2\u003e\n\u003cdiv class=\"wgd-overview-intro\"\u003e\n\u003cp\u003eThe Wine Guardian Defrost Sensor, part number 39H0040-02, is the genuine defrost sensor that Wine Guardian states is used in all Wine Guardian units with its current remote interface controller, and that can be added to a unit for freeze protection after purchase.\u003c\/p\u003e\n\u003cp\u003eTwo different readers land on this part. One is replacing a sensor that a technician has already identified. The other is adding freeze protection to a unit that was not built with it. Wine Guardian publishes the part for both, which is unusual for a control component and worth knowing before you order.\u003c\/p\u003e\n\u003cp\u003eAs an authorized Wine Guardian dealer we supply genuine Wine Guardian parts. We do not publish diagnostic or fitting procedure for components inside a refrigeration unit: that work belongs to a licensed HVAC professional or qualified contractor following official Wine Guardian documentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\n\u003cspan class=\"wgd-eyebrow\"\u003eSpecifications\u003c\/span\u003e\u003ch2 class=\"wgd-h2\"\u003eWhat Wine Guardian Publishes for Sensor 39H0040-02\u003c\/h2\u003e\n\u003cp\u003eWine Guardian publishes a part number, a description, a control-generation fitment statement and one note about adding the sensor after purchase. It lists no associated documents for the part.\u003c\/p\u003e\n\u003cdiv class=\"wgd-spec\"\u003e\n\u003cdiv class=\"wgd-spec-row\"\u003e\n\u003cspan class=\"wgd-spec-label\"\u003ePart Number\u003c\/span\u003e\u003cspan class=\"wgd-spec-val\"\u003e39H0040-02\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wgd-spec-row\"\u003e\n\u003cspan class=\"wgd-spec-label\"\u003eType\u003c\/span\u003e\u003cspan class=\"wgd-spec-val\"\u003eDefrost sensor\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wgd-spec-row\"\u003e\n\u003cspan class=\"wgd-spec-label\"\u003eManufacturer Fitment Statement\u003c\/span\u003e\u003cspan class=\"wgd-spec-val\"\u003eUsed in all Wine Guardian units with the current remote interface controller\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wgd-spec-row\"\u003e\n\u003cspan class=\"wgd-spec-label\"\u003ePublished Use\u003c\/span\u003e\u003cspan class=\"wgd-spec-val\"\u003eCan be added to a unit for freeze protection after purchase\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wgd-spec-row\"\u003e\n\u003cspan class=\"wgd-spec-label\"\u003eManufacturer Documentation\u003c\/span\u003e\u003cspan class=\"wgd-spec-val\"\u003eWine Guardian lists no associated documents for this part\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\n\u003cspan class=\"wgd-eyebrow\"\u003eCompatibility\u003c\/span\u003e\u003ch2 class=\"wgd-h2\"\u003eWhich Wine Guardian Units Take the 39H0040-02 Sensor\u003c\/h2\u003e\n\u003cp\u003eWine Guardian keys this sensor to the control generation rather than to a model list: it is used in all Wine Guardian units with its current remote interface controller. The question to answer before ordering is therefore which interface your unit runs, not which cooling configuration it is.\u003c\/p\u003e\n\u003cp\u003eWhether the unit is a \u003ca class=\"wgd-inline\" href=\"\/collections\/wine-guardian-ducted-wine-cellar-cooling-systems\"\u003educted\u003c\/a\u003e, \u003ca class=\"wgd-inline\" href=\"\/collections\/wine-guardian-ducted-split-wine-cellar-cooling-systems\"\u003educted split\u003c\/a\u003e, \u003ca class=\"wgd-inline\" href=\"\/collections\/wine-guardian-ductless-split-cooling-systems\"\u003eductless split or ceiling-mount\u003c\/a\u003e or \u003ca class=\"wgd-inline\" href=\"\/collections\/wine-guardian-through-the-wall-wine-cellar-cooling-units\"\u003ethrough-the-wall\u003c\/a\u003e system, the deciding factor is the interface generation. The interface Wine Guardian currently lists in its own catalog is the \u003ca class=\"wgd-inline\" href=\"\/products\/wine-guardian-remote-interface-91h0105-01\"\u003eRemote Interface Controller 91H0105-01\u003c\/a\u003e, and the defrost input that this sensor feeds is one of the settings that interface exposes, with enable and disable control and its own cut-in and cut-out set points.\u003c\/p\u003e\n\u003cul class=\"wgd-fits\"\u003e\n\u003cli\u003e\n\u003cspan class=\"wgd-fits-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003eWine Guardian units running the current remote interface controller\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"wgd-fits-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003eKeyed to the control generation, not to the cooling configuration\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"wgd-fits-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003eCan be added after purchase for freeze protection\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause Wine Guardian publishes a family statement rather than a list, read the model and serial number from the data plate on your unit and check them against the documentation for your model on our Wine Guardian manuals and spec sheets page. Send them to us and our team will confirm the part number, or ask Wine Guardian's parts department to identify the unit from the serial number.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\n\u003cspan class=\"wgd-eyebrow\"\u003eAdding One Later\u003c\/span\u003e\u003ch2 class=\"wgd-h2\"\u003eFitting Freeze Protection to a Unit That Did Not Have It\u003c\/h2\u003e\n\u003cp\u003eWine Guardian states that this sensor can be added to a unit for freeze protection after purchase, so it is not restricted to like-for-like replacement. That is a genuine retrofit option rather than an inference from the part description.\u003c\/p\u003e\n\u003cp\u003eWhether the addition suits your unit and your installation, and how it is carried out, is for a licensed HVAC professional or qualified contractor to determine from official Wine Guardian documentation. Other control-circuit parts stocked here include the \u003ca class=\"wgd-inline\" href=\"\/products\/wine-guardian-control-board-mcb-39h0043-00\"\u003eControl Board MCB 39H0043-00\u003c\/a\u003e and the \u003ca class=\"wgd-inline\" href=\"\/products\/wine-guardian-fan-cycle-switch-32h0026-00\"\u003eFan Cycle Switch 32H0026-00\u003c\/a\u003e, each with its own separate fitment statement.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\n\u003cspan class=\"wgd-eyebrow\"\u003eRelated Parts\u003c\/span\u003e\u003ch2 class=\"wgd-h2\"\u003eControl Parts Often Ordered Alongside This Sensor\u003c\/h2\u003e\n\u003cdiv class=\"wgd-overview-intro\"\u003e\n\u003cp\u003eThe parts most often confirmed alongside this sensor are the \u003ca class=\"wgd-inline\" href=\"\/products\/wine-guardian-control-board-mcb-39h0043-00\"\u003eControl Board MCB 39H0043-00\u003c\/a\u003e, the \u003ca class=\"wgd-inline\" href=\"\/products\/wine-guardian-fan-cycle-switch-32h0026-00\"\u003eFan Cycle Switch 32H0026-00\u003c\/a\u003e and the \u003ca class=\"wgd-inline\" href=\"\/products\/wine-guardian-remote-interface-91h0105-01\"\u003eRemote Interface Controller 91H0105-01\u003c\/a\u003e that exposes the defrost input. Each carries its own separate fitment statement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wgd-rel\"\u003e\n\u003ca class=\"wgd-rtile\" href=\"\/products\/wine-guardian-control-board-mcb-39h0043-00\"\u003e\u003cimg class=\"wgd-rtile-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0061\/3318\/6660\/files\/wine-guardian-control-board-mcb-39h0043-00.jpg?v=1792771594\" alt=\"Wine Guardian main control board 39H0043-00 for units built after January 2020\" loading=\"lazy\"\u003e\u003cspan class=\"wgd-rtile-body\"\u003e\u003cspan class=\"wgd-rtile-name\"\u003eControl Board MCB 39H0043-00\u003c\/span\u003e\u003cspan class=\"wgd-rarr\"\u003e→\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca class=\"wgd-rtile\" href=\"\/products\/wine-guardian-fan-cycle-switch-32h0026-00\"\u003e\u003cimg class=\"wgd-rtile-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0061\/3318\/6660\/files\/wine-guardian-fan-cycle-switch-32h0026-00.jpg?v=1792771594\" alt=\"Wine Guardian fan cycle switch 32H0026-00 for Extreme Climate Protection and Pro units\" loading=\"lazy\"\u003e\u003cspan class=\"wgd-rtile-body\"\u003e\u003cspan class=\"wgd-rtile-name\"\u003eFan Cycle Switch 32H0026-00\u003c\/span\u003e\u003cspan class=\"wgd-rarr\"\u003e→\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca class=\"wgd-rtile\" href=\"\/products\/wine-guardian-remote-interface-91h0105-01\"\u003e\u003cimg class=\"wgd-rtile-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0061\/3318\/6660\/files\/wine-guardian-remote-interface-91h0105-01-accessories-91h0105-01-wine-coolers-empire-1127158244.png?v=1739000936\" alt=\"Wine Guardian Remote Interface Controller 91H0105-01 wall-mounted thermostat and humidistat\" loading=\"lazy\"\u003e\u003cspan class=\"wgd-rtile-body\"\u003e\u003cspan class=\"wgd-rtile-name\"\u003eRemote Interface Controller 91H0105-01\u003c\/span\u003e\u003cspan class=\"wgd-rarr\"\u003e→\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\u003cdiv class=\"wgd-col-note\"\u003e\n\u003cp\u003eLooking at a replacement unit rather than a repair? Compare the current \u003ca class=\"wgd-inline\" href=\"\/collections\/wine-guardian\"\u003eWine Guardian wine cellar cooling systems\u003c\/a\u003e range.\u003c\/p\u003e\n\u003cp\u003eThe rest of the catalog is in \u003ca class=\"wgd-inline\" href=\"\/collections\/add-ons-wine-cellar-cooling-systems-accessories\"\u003eWine Guardian parts and accessories\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\n\u003cspan class=\"wgd-eyebrow\"\u003eFAQ\u003c\/span\u003e\u003ch2 class=\"wgd-h2\"\u003eFrequently Asked Questions About the Wine Guardian Defrost Sensor\u003c\/h2\u003e\n\u003cdetails class=\"wgd-faq\" name=\"wgd-faq-group\"\u003e\u003csummary\u003eWhich Wine Guardian units use the 39H0040-02 defrost sensor?\u003c\/summary\u003e\u003cdiv class=\"wgd-faq-body\"\u003eWine Guardian states it is used in all Wine Guardian units with its current remote interface controller. The deciding factor is the control generation on the unit rather than the cooling configuration.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"wgd-faq\" name=\"wgd-faq-group\"\u003e\u003csummary\u003eCan a defrost sensor be added to a unit that was not built with one?\u003c\/summary\u003e\u003cdiv class=\"wgd-faq-body\"\u003eWine Guardian states the sensor can be added to a unit for freeze protection after purchase. Whether that suits your unit should be confirmed by a licensed HVAC professional or qualified contractor.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"wgd-faq\" name=\"wgd-faq-group\"\u003e\u003csummary\u003eWhat does the defrost sensor do on a Wine Guardian unit?\u003c\/summary\u003e\u003cdiv class=\"wgd-faq-body\"\u003eIt supplies the defrost input that the Wine Guardian remote interface uses. The interface exposes a setting to enable or disable that input, along with defrost cut-in and cut-out set points.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"wgd-faq\" name=\"wgd-faq-group\"\u003e\u003csummary\u003eHow do I confirm 39H0040-02 is the right part number for my unit?\u003c\/summary\u003e\u003cdiv class=\"wgd-faq-body\"\u003eRead the model and serial number from the data plate on the unit and check them against the documentation for your model. Wine Guardian lists no associated documents for the part itself, so the unit manual is the reference.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"wgd-faq\" name=\"wgd-faq-group\"\u003e\u003csummary\u003eDoes fitting a defrost sensor need a technician?\u003c\/summary\u003e\u003cdiv class=\"wgd-faq-body\"\u003eWe do not publish a fitting procedure for it. Work inside a refrigeration unit should be carried out by a licensed HVAC professional or qualified contractor following official Wine Guardian documentation.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"wgd-sec\"\u003e\u003cdiv class=\"wgd-inner\"\u003e\u003cdiv class=\"wgd-cta\"\u003e\n\u003ch2\u003eConfirm the Sensor Against Your Unit\u003c\/h2\u003e\n\u003cp\u003eSend the model and serial number from your unit's data plate and our team will confirm the Wine Guardian part number before you order. Diagnosis and fitting should be handled by a licensed HVAC professional or qualified contractor working from official Wine Guardian documentation.\u003c\/p\u003e\n\u003cdiv class=\"wgd-cta-btns\"\u003e\n\u003ca class=\"wgd-btn\" href=\"\/collections\/add-ons-wine-cellar-cooling-systems-accessories\"\u003eBrowse All Parts and Accessories\u003c\/a\u003e\u003ca class=\"wgd-btn--ghost\" href=\"\/pages\/contact-us\"\u003eContact Us\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\n\u003c\/div\u003e\u003cstyle\u003e.wgd-acc-page{color:#23150f;}.wgd-sec{padding:30px 0;border-top:1px solid #ececed;}.wgd-sec:first-of-type{border-top:none;}.wgd-inner{max-width:1120px;margin:0 auto;padding:0 22px;}.wgd-eyebrow{display:inline-block;background-color:#5A1A0E;color:#ffffff;font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:6px 15px;border-radius:30px;margin-bottom:14px;}.wgd-product-title{font-size:26px;margin:0 0 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#e4e4e5;border-radius:14px;margin-bottom:10px;overflow:hidden;}.wgd-faq summary{cursor:pointer;list-style:none;padding:16px 50px 16px 20px;font-weight:700;color:#300B05;position:relative;background-color:#f6f6f7;}.wgd-faq summary::-webkit-details-marker{display:none;}.wgd-faq summary:after{content:\"+\";position:absolute;right:18px;top:50%;transform:translateY(-50%);width:26px;height:26px;line-height:24px;text-align:center;border-radius:50%;background-color:#300B05;color:#ffffff;}.wgd-faq[open] summary{background-color:#300B05;color:#ffffff;}.wgd-faq[open] summary:after{content:\"−\";background-color:#C8A24A;color:#300B05;}.wgd-faq-body{padding:16px 20px;font-size:14px;line-height:1.6;color:#344047;}.wgd-acc-page a.wgd-inline{color:#5A1A0E;text-decoration:underline;font-weight:700;}.wgd-cta{background-color:#300B05;color:#ffffff;border-radius:18px;padding:40px 34px;text-align:center;position:relative;overflow:hidden;}.wgd-cta:before{content:\"\";position:absolute;left:0;top:0;width:100%;height:6px;background-image:linear-gradient(90deg,#C8A24A 0%,#A3BD04 50%,#C8A24A 100%);}.wgd-cta h2{color:#ffffff!important;font-size:26px;margin:0 0 14px;}.wgd-cta p{color:#E8Cf93;max-width:680px;margin:0 auto;font-size:15px;}.wgd-cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:24px;}.wgd-btn{display:inline-block;background-color:#C8A24A;color:#300B05!important;text-decoration:none;font-weight:800;padding:14px 28px;border-radius:999px;}.wgd-btn--ghost{display:inline-block;background-color:transparent;color:#ffffff!important;text-decoration:none;font-weight:700;padding:14px 28px;border-radius:999px;border:2px solid #C8A24A;}@media(max-width:768px){.wgd-rel{grid-template-columns:1fr;}.wgd-spec-row{grid-template-columns:1fr;}.wgd-spec-val{border-left:none;border-top:1px solid #e4e4e5;}}\u003c\/style\u003e","brand":"Wine Guardian","offers":[{"title":"Default Title","offer_id":67883806884060,"sku":"39H0040-02","price":190.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0061\/3318\/6660\/files\/wine-guardian-defrost-sensor-39h0040-02-accessories-39h0040-02-wine-coolers-empire-1264226929.jpg?v=1792795030","url":"https:\/\/winecoolersempire.com\/products\/wine-guardian-defrost-sensor-39h0040-02","provider":"Wine Coolers Empire","version":"1.0","type":"link"}