
309574 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $14.72 | Condition is New, Emerson Electric Heat Sequencer F77-5412 / 15SH2-309574 / L36-478 (NEW), shipping cost = $3.99 | 99.9% |
![]() | $18.50 | Top Pick! Condition is New, THERM-O-DISC 15SH2 H24V 309574/ L36-478 COPELAND/EMERSON F77-5412 HEAT SEQUENCER, FREE SHIPPING | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $14.95 | Condition is Used, Emerson Electric Heat Sequencer F77-5412 / 15SH2-309574 / L36-478, FREE SHIPPING | 99.9% |
![]() | $17.88 | Condition is Used, Emerson F77-5412 Electric Heat Sequencer 15SH2-309574 L36-478 309574 USED, FREE SHIPPING | 98.5% |

The Emerson 309574 Electric Heat Sequencer F77-5412 15SH2-309574 L36-478 is a versatile and efficient heating solution designed for residential and light commercial applications. This sequencer is part of Emerson's F77 series, known for their reliability and energy-saving capabilities.
The sequencer is designed to control the operation of up to 15 electric heating elements, making it suitable for larger heating systems. It features a user-friendly control panel with easy-to-read indicators and push-button adjustments for temperature setting and sequencing. The temperature range is adjustable from 50 F to 150 F (10 C to 65 C), allowing you to customize the comfort level for your space.
This Emerson sequencer also includes a number of advanced features to optimize energy usage and extend the life of your heating elements. It utilizes a proportional sequencing algorithm, which activates heating elements in a specific sequence based on their individual power consumption. This ensures that the elements are not overworked, reducing the risk of premature failure and saving energy.
Additionally, the sequencer comes equipped with a self-diagnostic function, which can detect and display fault codes if an issue arises. This makes troubleshooting simple and efficient, allowing you to address any problems quickly and minimize downtime.
The Emerson 309574 Electric Heat Sequencer F77-5412 15SH2-309574 L36-478 is designed with a compact, wall-mountable enclosure, making it easy to install in a variety of locations. It is UL listed for safety and comes with a one-year limited warranty for added peace of mind. Overall, this sequencer provides reliable, energy-efficient heating control for your residential or light commercial application.
Pros and Cons of Buying Emerson 309574 Electric Heat Sequencer F77-5412 15sh2-309574 L36-478
Introduction:The Emerson 309574 Electric Heat Sequencer F77-5412 15sh2-309574 L36-478 is a heating component used in various HVAC systems. This device is designed to manage the sequencing of multiple heating stages to maintain optimal temperature levels. In this analysis, we will discuss the advantages and disadvantages of purchasing this electric heat sequencer.
Pros:1. Energy Efficiency: This heat sequencer optimizes energy usage by only activating the necessary heating stages. By doing so, it contributes to reducing energy consumption and saving money on utility bills.
2. Improved Temperature Control: The sequencer ensures precise temperature control by managing the activation of heating stages based on the desired temperature setting.
3. Durability: Emerson is a well-known brand that manufactures high-quality components. The heat sequencer is built to last with robust components, ensuring reliable performance over extended periods.
4. Easy Installation: The heat sequencer is designed for straightforward installation, making it a favorable choice for both professionals and DIY enthusiasts.
5. Enhanced Comfort: By maintaining consistent temperature levels, the heat sequencer contributes to increased comfort in residential and commercial spaces.
Cons:1. Cost: The Emerson 309574 Electric Heat Sequencer may come with a higher price tag compared to some competitors' models.
2. Complexity: Although the installation process is relatively simple, the heat sequencer's functionality may require a basic understanding of HVAC systems to fully utilize its features.
3. Limited Compatibility: The heat sequencer may not be compatible with all HVAC systems, so it's essential to verify its compatibility before making a purchase.
4. Potential for Faults: Like any other electronic component, the heat sequencer may experience faults or malfunctions, which could potentially lead to costly repairs or replacements.
Conclusion:The Emerson 309574 Electric Heat Sequencer offers several advantages, including energy efficiency, improved temperature control, durability, easy installation, and enhanced comfort. However, it also comes with some disadvantages, such as a potentially higher cost, complexity, limited compatibility, and the potential for faults.
Recommendation:If the benefits of the Emerson 309574 Electric Heat Sequencer align with your specific needs and budget, it could be an excellent investment for your HVAC system. Ensure that it is compatible with your system and consider the potential savings on energy bills and increased comfort when evaluating the cost. If you're uncertain about the installation process or have limited experience with HVAC systems, it may be wise to consult a professional for assistance.
Details:
Emerson electric heat sequencer F77-5412 / 15SH2-309574 L36-478 new.
specifications maxohvac:
- brand: Emerson
- mpn: 309574
- model: F77-5412
- custom bundle: No
returns maxohvac:
- policy: no returns
shipping maxohvac:
- type: calculated
- class: standard
- transit: 4-10 days
- carrier: usps
- service: usps ground advantage
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
payments maxohvac:
- other
- wallet: google-pay
- credit card: mastercard
seller maxohvac:
- city: indianapolis, indiana
- rating: 99.7%
- # reviews: 6462
offer maxohvac:
- availability: in stock
- prices: $14.72–$18.50
- item condition:
- New
- Used
- sold #: 10
- started: december 30, 2025
- options: ship-to-home
- in stock #: 4
Also Viewed:
- 240RA-12T7M: BOX SOLENOID VALVE COIL, Emerson
- 998-0661-16: VALVE PLATE KIT BOX, Copeland
- 309866: , Emerson
- 50V51-289-02: FURNACE CONTROL BOARD, Emerson
- PCBHR104S: PUMP CONTROL, Emerson
- EK-052S: SOLDER, Emerson Ek
- 943-0010-01: , Emerson
- 24A34-3: FAN STRIP FURNACE, White Rodgers
- 50C51-290: FURNACE CONTROL BOARD, Amana Emerson
- 191793G1: KIT SENSOR, Emerson Liebert
- 50V54-571-02-07991: FURNACE CONTROL BOARD, Trane American Standard Emerson



