{"product_id":"heatilator-4021-642-high-limit-switch-350-f-auto-reset","title":"Heatilator 4021-642 High Limit Switch | 350°F Auto Reset","description":"\u003ch3\u003e\u003cstrong\u003eHeatilator 4021-642 High Limit Switch | 350°F Auto Reset\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 4021-642 high limit switch is a temperature-operated replacement for the specified Heatilator appliances below. The product drawing identifies a normally closed switch that opens at 350°F and resets automatically. Its flush face, mounting ears and vertical electrical terminals must match the original installation.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNormally closed high limit switch.\u003c\/li\u003e\n\u003cli\u003eOpens at the specified 350°F temperature rating.\u003c\/li\u003e\n\u003cli\u003eAutomatic reset operation.\u003c\/li\u003e\n\u003cli\u003eFlush-face switch body with two mounting ears.\u003c\/li\u003e\n\u003cli\u003eVertical electrical terminal orientation shown in the dimension drawing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 4021-642\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-reference:\u003c\/strong\u003e SRV4021-642\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact state:\u003c\/strong\u003e Normally closed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening rating:\u003c\/strong\u003e 350°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFace:\u003c\/strong\u003e Flush\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal orientation:\u003c\/strong\u003e Vertical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody diameter shown:\u003c\/strong\u003e 11\/16 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting hole spacing shown:\u003c\/strong\u003e 15\/16 in. center to center\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody depth shown:\u003c\/strong\u003e 3\/8 in. (excluding terminal projection)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eMatch the original part number, exact model, ignition system and any applicable production range. A shared fireplace brand or similar appearance alone does not establish compatibility.\u003c\/p\u003e\n\u003ch3\u003eCross Reference\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eHeatilator: 4021-642 \/ SRV4021-642\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eFireplace Models\u003c\/h3\u003e\u003cp\u003eThe following exact models are supported by manufacturer service-parts information. This is a verified selection, not a universal or exhaustive fit list.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatilator:\u003c\/strong\u003e GCDC36E, GCDC36LE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatilator:\u003c\/strong\u003e GCDC42E, GCDC42LE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatilator:\u003c\/strong\u003e GCDC60E, GCDC60LE. Pre 17\/99 only. The manufacturer does not list this switch for Post 17\/99 units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatilator:\u003c\/strong\u003e CB4236IR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatilator:\u003c\/strong\u003e CB4842IR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatilator:\u003c\/strong\u003e CB4236MIR\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\u003cp\u003eOne 4021-642 high limit switch, as pictured.\u003c\/p\u003e\n\u003ch3\u003eBefore Ordering\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse only the specified temperature rating and contact configuration. Never bypass a safety limit switch.\u003c\/li\u003e\n\u003cli\u003eMatch the model and, for GCDC60E\/GCDC60LE, the production code before ordering.\u003c\/li\u003e\n\u003cli\u003eHave a qualified fireplace service technician verify the replacement and follow the appliance manufacturer's service instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Note\u003c\/h3\u003e\u003cp\u003eThis is a special-order item. Confirm availability and lead time before ordering. Installation and safety testing must be performed by a qualified gas-appliance technician. Do not bypass safety devices.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Replacement?\u003c\/h3\u003e\u003cp\u003eThe specific part-number and model details help you compare this service component with your original appliance parts list before ordering.\u003c\/p\u003e","brand":"Limit Switch","offers":[{"title":"Default Title","offer_id":67877669208432,"sku":"SO-FP0663","price":22.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/4463\/3444\/files\/FP0663_01.png?v=1792769851","url":"https:\/\/total-hearth.com\/products\/heatilator-4021-642-high-limit-switch-350-f-auto-reset","provider":"Total Hearth","version":"1.0","type":"link"}