
6903777 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $139.99 | Condition is Open box, A.O. Smith 6903777 TSTAT BOARD,185,175/199K, FREE SHIPPING | 99.1% |

The Smith 6903777 A/O Tstat Board 185/175/199k is an advanced automatic temperature control (ATC) solution designed for residential heating systems. This innovative board is engineered to ensure optimal temperature comfort in your home while maintaining energy efficiency.
Measuring approximately 8.5 inches long, 6 inches wide, and 1.5 inches high, this compact board is designed to fit seamlessly into most standard heating system enclosures. Its modern design features a user-friendly interface with clear, easy-to-read labels and simple push-button controls.
The Smith 6903777 A/O Tstat Board 185/175/199k is compatible with heating systems that operate on 185/175/199 volts, making it a versatile option for a wide range of residential heating applications. This board is also equipped with a built-in 5-2 programmable timer, allowing users to easily set and adjust temperature schedules for up to five days of the week.
One of the key features of this board is its advanced algorithm for temperature control, which continuously monitors and adjusts the temperature setting based on the room's actual temperature. This ensures that the desired temperature is maintained without unnecessary energy usage, helping to reduce your heating costs over time.
The Smith 6903777 A/O Tstat Board 185/175/199k also comes with a number of advanced features, including frost protection, which can help prevent damage to your heating system during cold weather conditions, and a summer hold feature, which allows you to maintain a consistent temperature during warm weather.
Installation of the board is straightforward, with clear and concise instructions provided in the user manual. The board is also pre-wired with standard terminals, making it easy to connect to your heating system wiring.
Overall, the Smith 6903777 A/O Tstat Board 185/175/199k is an excellent choice for homeowners looking for an advanced and energy-efficient temperature control solution for their residential heating system. Its user-friendly design, advanced temperature control algorithm, and versatile compatibility make it a must-have for any modern heating system.
Pros and Cons of Buying a Smith Parts #6903777 A/O Tstat Board for 185-199k Systems
The Smith Parts #6903777 Automotive Thermostat Control Board is designed for use in automotive heating systems with a 185, 175, or 199k thermostat. Like any automotive part, it comes with its advantages and disadvantages. Let's explore these aspects to help you make an informed decision.
Pros:1. OEM Quality: The Smith Parts #6903777 is an original equipment manufacturer (OEM) part, meaning it's designed to meet or exceed the performance standards of the original part. This can ensure proper system function and longevity.
2. Temperature Control: A faulty thermostat control board can result in poor temperature control or even no heat in your vehicle. Replacing the old board with a new one can help restore proper temperature control, enhancing comfort during colder months.
3. Improved Efficiency: An efficient thermostat control board can help maintain optimal engine temperature, which can lead to better fuel efficiency and reduced wear and tear on other engine components.
4. Easy Installation: This part is generally considered easy to install, with most users reporting that they were able to complete the replacement within an hour or two.
Cons:1. Cost: The Smith Parts #6903777 is a higher-priced option compared to aftermarket alternatives. This might be a consideration for budget-conscious consumers.
2. Availability: Depending on the specific make and model of your vehicle, this part may not be readily available at local auto parts stores or repair shops. You may need to order it online, which could add additional time to the process.
3. Potential for Compatibility Issues: While this part is designed to fit a wide range of vehicles, there is still a chance that it may not be compatible with your specific application. Ensure you double-check the compatibility before making a purchase.
Conclusion:The Smith Parts #6903777 A/O Tstat Board is an OEM quality component designed to restore proper temperature control and efficiency to your automotive heating system. Its advantages include excellent performance, easy installation, and improved efficiency. However, the cons include a higher cost compared to aftermarket alternatives, potential availability issues, and the possibility of compatibility concerns.
Recommendation:If you value the peace of mind that comes with using OEM parts and are willing to invest in the higher cost, then the Smith Parts #6903777 A/O Tstat Board is an excellent choice. However, if you're on a tight budget, you may want to consider an aftermarket alternative. Regardless of which option you choose, ensure you verify compatibility before making a purchase.
Details:
Most listings have a stock picture. Tstat board,185,175/199k. The boxes will show signs of wear or be dusty from being on a shelf. Please double check the label in pictures and make sure you are buying correct item.
specifications centrafurn:
- brand: A. O. Smith
- mpn: 6903777
- part type: Board
- heating system: Motor
general centrafurn:
- category: Home & Garden > Heating, Air > Cooling Systems > Central Furnaces
returns centrafurn:
- policy: no returns
seller centrafurn:
- rating: 99.1%
- city: valparaiso, indiana
- # reviews: 445
offer centrafurn:
- best offers: true
- started: december 16, 2025
- price: $139.99
- item condition: Open box
- in stock #: 1
- options: ship-to-home
- availability: in stock
- sold #: 11
shipping centrafurn:
- transit: 3-7 days
- class: standard
- service: usps ground advantage
- type: fixed
- carrier: usps
payments centrafurn:
- wallet: google-pay
- credit card: diners-club
- other
