{"product_id":"goodman-b1256559-heat-sequencer-genuine-oem-24v-2-stage-staging-relay","title":"Goodman B1256559 Heat Sequencer – Genuine OEM 24V 2-Stage Staging Relay","description":"\u003ch1\u003eGoodman B1256559 Heat Sequencer – Genuine OEM 24V 2-Stage Staging Relay\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eGoodman B1256559 Heat Sequencer\u003c\/strong\u003e is a critical mechanical timing component designed to regulate the sequential activation of electric heating elements in your HVAC system. Often described as the \"timing center\" for electric heat, this genuine OEM part ensures that heating coils energize and de-energize in a specific, staggered order. This function is vital for protecting your home’s electrical panel from massive current surges that occur when multiple 5kW elements pull power simultaneously. Engineered for \u003cstrong\u003eGoodman, Amana, and Janitrol\u003c\/strong\u003e furnace and air handler series, the B1256559 provides the precise thermal delay needed to ensure the blower motor is moving air before the elements reach peak temperature, preventing the high-limit safety switches from tripping.\u003c\/p\u003e\n\u003ch2\u003eKey Features and Function:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Airflow Management:\u003c\/strong\u003e Expertly orchestrates the turn-on\/turn-off sequence of heating elements to provide consistent discharge air temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability\/Fitment:\u003c\/strong\u003e Manufactured to original factory specifications, guaranteeing the exact \"On\" and \"Off\" delay timings required by your specific furnace series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Surge Protection:\u003c\/strong\u003e Prevents detrimental power spikes by maintaining a systematic activation delay, protecting both the HVAC equipment and your home's circuit breakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Bimetal Design:\u003c\/strong\u003e Utilizes a rugged internal thermal disc to manage high-amperage resistive loads without the \"chattering\" or hum common in universal relays.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Details and Key Specifications:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1256559 (Replaces B1256552, B12565-52, B12565-59)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Goodman \/ Amana (Genuine OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e 2-Stage Heat Sequencer Relay\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24 VAC (Control Circuit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 30 Amps @ 240V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiming:\u003c\/strong\u003e On: 1 to 20 Seconds | Off: 40 to 110 Seconds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Stacks\/Switches:\u003c\/strong\u003e 2-High Stack (M1-M2, M3-M4)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 4 in x 23.75 in x 30.75 in (Packaged)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 0.3 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip: The Terminal Verification\u003c\/h2\u003e\n\u003cp\u003eWhen replacing the \u003cstrong\u003eB1256559\u003c\/strong\u003e, always verify the wiring against the original unit's terminal markings. These sequencers use a 24V heater coil at the base to warp a bimetal disc; if you accidentally swap the 24V control wires with the 240V load wires, you will instantly destroy the sequencer and potentially the furnace transformer. During your \u003cstrong\u003eDiagnostic Check\u003c\/strong\u003e, if the heating elements stay on after the thermostat is satisfied, the contacts have likely welded shut. Always use \"Take a Picture First\" before removing any of the 1\/4\" quick-connect terminals.\u003c\/p\u003e\n\u003ch2\u003eCross-Reference \u0026amp; Compatibility:\u003c\/h2\u003e\n\u003cp\u003eThe B1256559 is a direct OEM replacement for the following part numbers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Numbers:\u003c\/strong\u003e B1256552, B12565-52, B1256559S, 0130M00063\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTherm-O-Disc:\u003c\/strong\u003e 15S22, 15S21, 309837, H1-20 C40-110\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftermarket Cross:\u003c\/strong\u003e Emerson 24A34-3, Mars 31259, Packard SEQ6002, Klixon 60000E02-3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eExtensive Model Compatibility List:\u003c\/h2\u003e\n\u003cp\u003eNote: Use 'CTRL+F' to search for your specific model:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodman Air Handlers:\u003c\/strong\u003e AWUF180516, AWUF240516, AWUF300516, AWUF301016, AWUF360816, ARUF1824, ARUF3030, ARUF3642\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodman Heater Kits:\u003c\/strong\u003e HKR-05, HKR-08, HKR-10, HKR-15C, HKR-20C, HKSC15, HKSC20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmana Units:\u003c\/strong\u003e ASPT, ASUF, and AMVE series electric heat sections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Series:\u003c\/strong\u003e Fits various Janitrol, Kenmore, and GMC electric furnace models requiring 2-stage staging.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":52572667937131,"sku":"B1256559","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/B1256559.jpg?v=1763659428","url":"https:\/\/tophvacparts.com\/products\/goodman-b1256559-heat-sequencer-genuine-oem-24v-2-stage-staging-relay","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}