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- Voltage: 24V AC
- Amps AC: 0.45 A
- Frequency: 50/60 Hz
- Minimum Operating Temperature: -40 Degrees F
- Input Voltage: 120V AC, 24V AC
- Maximum Operating Temperature: 175 Degrees F
Specifications
| Part Number | 21M51U-843 |
| Brand | White-Rodgers |
| Width | 5 1/4 in |
| Electrical Connections | 1/4 Spade Terminals And Molex Plugs |
| Probe Length | 15 1/2 in |
| Height | 8 in |
| Igniter Warm-Up Time (Sec.) | 17 sec |
| Lead Length | 15 1/2 in |
| Depth | 1 1/4 in |
| Overall Width | 5 1/4 in |
| Overall Height | 8 in |
| Overall Depth | 1 1/4 in |
| Gas Type | LP/NG |
| Prepurge Time (Sec.) | 15 sec |
| Type | Universal Integrated Two-Stage |
| Voltage | 24V AC |
| Includes | Trane Ignitor Mounting Bracket |
| Amps AC | 0.45 A |
| Control Volts | 24 V |
| Item | Integrated Furnace Control |
| Electrical Ratings | 24V AC |
| Retries | 2 |
| For Use With | Residential, Commercial Heating Equipment |
| Standards | CSA Certified |
| Product Type | Integrated Furnace Control |
| Board Type | Integrated Board |
| Cool Delay to Fan On | 5 sec |
| Number of Retries | 2 |
| Igniter Warm Up Time | 17 sec |
| Replacement Type | Universal |
| Frequency | 50/60 Hz |
| Cool Delay to Fan Off | 60 sec |
| Automatic Reset Time | 1 hr |
| Minimum Operating Temperature | -40 Degrees F |
| OEM Replacement Part Number | 18M3401, 20300001, 20300003, 21M51U-843, 46M9901, 50M61-120, 50M61-242, 50M61-288, 50M61-289, 50M61-495, 50M61-843, 83L9301, CNT03077, CNT6424, D344301P01, KIT15943, PCBBF120S, PCBBF125, X13650839010 |
| Electrical Connection Type | 1/4 in Spade Terminals, Molex Plug |
| Input Voltage | 120V AC, 24V AC |
| Lock Out Time | 5 min |
| Heat Delay to Fan On | 45 sec |
| Pre-Purge Time | 15 sec |
| Thermostat Anticipator Setting | No Thermostat Anticipator |
| Maximum Operating Temperature | 175 Degrees F |
| Ignition Cycle Time | 90 seconds (HSI), 15 seconds (pre-purge), 15 seconds (post purge) |
| Main Valve Current Output | 1.5 A |
| Control Voltage | 24V AC |
| Compatible with Brand | Goodman, Lennox, Trane, White-Rodgers |
| Flame Sensor Current Output | 0.3 uA |
| Heat Delay to Fan Off | 180 sec |
| For Fuel Type | LP, Natural Gas |
Description
The White-Rodgers 21M51U-843 is a universal integrated two-stage furnace control with hot surface ignition. This control manages the ignition sequence, providing two retries for the hot surface igniter, and operates on 24V AC with a 0.45 A rating. It includes a Trane ignitor mounting bracket and is compatible with LP/NG gas systems, connecting via 1/4 spade terminals and Molex plugs.
| Shipping | This item ships to USA |
Processing Time:
All orders at Pro Replacement Parts are processed and shipped within 1-2 business days. For orders placed before 12 PM EST, we offer same-day shipping whenever possible. We aim to ensure that your order reaches you as quickly as possible.
Delivery Timeframe:
Our standard delivery window is between 3-8 business days, depending on your location. We partner with trusted carriers such as FedEx, UPS, USPS, and other local carriers to ensure your items arrive safely and on time.
Shipping Methods:
- Items exceeding 50” in width or 70 lbs in weight are shipped via Freight Carrier. You will be contacted by the carrier to schedule a delivery time.
- Items under 50” in width and 70 lbs in weight will be shipped via UPS or FedEx as a small package service.
Freight Shipments:
Freight shipments are delivered curbside in residential areas. You may need assistance to move the package indoors, or you can unbox the shipment and carry each piece inside individually. While some drivers may help move a shipment into a garage or carport, this is not guaranteed. For Inside Delivery requests, please contact us at the time of your order (additional fees apply). Email: support@proreplacementparts.com
Inspection and Damage:
Upon delivery, please inspect the carton and contents for any damage. If you find any damage, document it on the driver's delivery receipt and contact us immediately at support@proreplacementparts.com no later than 24 hours from the delivery time. We cannot accept responsibility for damage that is not noted on the driver's delivery receipt at the time of delivery.
Order Cancellations:
All order cancellations must be requested within 24 hours of placing the order. After this period, our standard return policy will take effect.
Thank you for choosing Pro Replacement Parts. We are dedicated to providing you with the best service and ensuring your orders are delivered in a timely and efficient manner. If you have any questions or need further assistance, please don't hesitate to contact us.
Wide Selection of Brands: At our store, you'll find an extensive range of electric motors from top brands in the industry. We carefully select our inventory to ensure that you have access to the best and most reliable products on the market. Whether you need a motor for an industrial machine, a household appliance, or a specialized project, we have something for everyone.
Customer-Centric Service: We believe in putting our customers first. Our team is committed to providing you with personalized service and support throughout your buying journey. From helping you choose the right motor for your needs to answering any queries you have after purchase, we're here to assist you every step of the way.
Competitive Pricing: We strive to offer our high-quality electric motors at competitive prices. Our goal is to provide you with the best value, ensuring that you get a top-performing motor without breaking the bank. Plus, our regular deals and promotions mean that you can save even more when you shop with us.
Reliable Shipping and Handling: While we don't offer same-day shipping, we understand the importance of timely delivery. That's why we work with reliable shipping partners to ensure that your order is processed, shipped, and delivered efficiently. You can trust us to get your electric motor to you in excellent condition and within a reasonable timeframe.
Knowledgeable Support: Our team is knowledgeable about the wide range of electric motors we offer. We can provide you with detailed information and specifications for each product, helping you make an informed decision. If you have any questions or need advice, our experts are just a call or email away.
Your purchase is covered by the Manufacturer’s Limited Warranty.
For return/refund information, please visit our Returns & Refunds page.
Description
- Voltage: 24V AC
- Amps AC: 0.45 A
- Frequency: 50/60 Hz
- Minimum Operating Temperature: -40 Degrees F
- Input Voltage: 120V AC, 24V AC
- Maximum Operating Temperature: 175 Degrees F
Specifications
| Part Number | 21M51U-843 |
| Brand | White-Rodgers |
| Width | 5 1/4 in |
| Electrical Connections | 1/4 Spade Terminals And Molex Plugs |
| Probe Length | 15 1/2 in |
| Height | 8 in |
| Igniter Warm-Up Time (Sec.) | 17 sec |
| Lead Length | 15 1/2 in |
| Depth | 1 1/4 in |
| Overall Width | 5 1/4 in |
| Overall Height | 8 in |
| Overall Depth | 1 1/4 in |
| Gas Type | LP/NG |
| Prepurge Time (Sec.) | 15 sec |
| Type | Universal Integrated Two-Stage |
| Voltage | 24V AC |
| Includes | Trane Ignitor Mounting Bracket |
| Amps AC | 0.45 A |
| Control Volts | 24 V |
| Item | Integrated Furnace Control |
| Electrical Ratings | 24V AC |
| Retries | 2 |
| For Use With | Residential, Commercial Heating Equipment |
| Standards | CSA Certified |
| Product Type | Integrated Furnace Control |
| Board Type | Integrated Board |
| Cool Delay to Fan On | 5 sec |
| Number of Retries | 2 |
| Igniter Warm Up Time | 17 sec |
| Replacement Type | Universal |
| Frequency | 50/60 Hz |
| Cool Delay to Fan Off | 60 sec |
| Automatic Reset Time | 1 hr |
| Minimum Operating Temperature | -40 Degrees F |
| OEM Replacement Part Number | 18M3401, 20300001, 20300003, 21M51U-843, 46M9901, 50M61-120, 50M61-242, 50M61-288, 50M61-289, 50M61-495, 50M61-843, 83L9301, CNT03077, CNT6424, D344301P01, KIT15943, PCBBF120S, PCBBF125, X13650839010 |
| Electrical Connection Type | 1/4 in Spade Terminals, Molex Plug |
| Input Voltage | 120V AC, 24V AC |
| Lock Out Time | 5 min |
| Heat Delay to Fan On | 45 sec |
| Pre-Purge Time | 15 sec |
| Thermostat Anticipator Setting | No Thermostat Anticipator |
| Maximum Operating Temperature | 175 Degrees F |
| Ignition Cycle Time | 90 seconds (HSI), 15 seconds (pre-purge), 15 seconds (post purge) |
| Main Valve Current Output | 1.5 A |
| Control Voltage | 24V AC |
| Compatible with Brand | Goodman, Lennox, Trane, White-Rodgers |
| Flame Sensor Current Output | 0.3 uA |
| Heat Delay to Fan Off | 180 sec |
| For Fuel Type | LP, Natural Gas |
Description
The White-Rodgers 21M51U-843 is a universal integrated two-stage furnace control with hot surface ignition. This control manages the ignition sequence, providing two retries for the hot surface igniter, and operates on 24V AC with a 0.45 A rating. It includes a Trane ignitor mounting bracket and is compatible with LP/NG gas systems, connecting via 1/4 spade terminals and Molex plugs.
Shipping
| Shipping | This item ships to USA |
Processing Time:
All orders at Pro Replacement Parts are processed and shipped within 1-2 business days. For orders placed before 12 PM EST, we offer same-day shipping whenever possible. We aim to ensure that your order reaches you as quickly as possible.
Delivery Timeframe:
Our standard delivery window is between 3-8 business days, depending on your location. We partner with trusted carriers such as FedEx, UPS, USPS, and other local carriers to ensure your items arrive safely and on time.
Shipping Methods:
- Items exceeding 50” in width or 70 lbs in weight are shipped via Freight Carrier. You will be contacted by the carrier to schedule a delivery time.
- Items under 50” in width and 70 lbs in weight will be shipped via UPS or FedEx as a small package service.
Freight Shipments:
Freight shipments are delivered curbside in residential areas. You may need assistance to move the package indoors, or you can unbox the shipment and carry each piece inside individually. While some drivers may help move a shipment into a garage or carport, this is not guaranteed. For Inside Delivery requests, please contact us at the time of your order (additional fees apply). Email: support@proreplacementparts.com
Inspection and Damage:
Upon delivery, please inspect the carton and contents for any damage. If you find any damage, document it on the driver's delivery receipt and contact us immediately at support@proreplacementparts.com no later than 24 hours from the delivery time. We cannot accept responsibility for damage that is not noted on the driver's delivery receipt at the time of delivery.
Order Cancellations:
All order cancellations must be requested within 24 hours of placing the order. After this period, our standard return policy will take effect.
Thank you for choosing Pro Replacement Parts. We are dedicated to providing you with the best service and ensuring your orders are delivered in a timely and efficient manner. If you have any questions or need further assistance, please don't hesitate to contact us.
Why Buy From Us?
Wide Selection of Brands: At our store, you'll find an extensive range of electric motors from top brands in the industry. We carefully select our inventory to ensure that you have access to the best and most reliable products on the market. Whether you need a motor for an industrial machine, a household appliance, or a specialized project, we have something for everyone.
Customer-Centric Service: We believe in putting our customers first. Our team is committed to providing you with personalized service and support throughout your buying journey. From helping you choose the right motor for your needs to answering any queries you have after purchase, we're here to assist you every step of the way.
Competitive Pricing: We strive to offer our high-quality electric motors at competitive prices. Our goal is to provide you with the best value, ensuring that you get a top-performing motor without breaking the bank. Plus, our regular deals and promotions mean that you can save even more when you shop with us.
Reliable Shipping and Handling: While we don't offer same-day shipping, we understand the importance of timely delivery. That's why we work with reliable shipping partners to ensure that your order is processed, shipped, and delivered efficiently. You can trust us to get your electric motor to you in excellent condition and within a reasonable timeframe.
Knowledgeable Support: Our team is knowledgeable about the wide range of electric motors we offer. We can provide you with detailed information and specifications for each product, helping you make an informed decision. If you have any questions or need advice, our experts are just a call or email away.
Warranty/Returns
Your purchase is covered by the Manufacturer’s Limited Warranty.
For return/refund information, please visit our Returns & Refunds page.
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