
L444B20X0A2 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $169.00 | Condition is New, New HONEYWELL L444B L444B20X0A2 Aquastat, FREE SHIPPING | ![]() |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $60.00 | Condition is Used, HONEYWELL L444B20X0A2 AQUASTAT - high limit relay Vintage boiler control, FREE SHIPPING | 99.7% |

The Honeywell L444B20X0A2 Aquastat High Limit Relay is an essential component in the safety and efficient operation of a heating system. This boiler control device is specifically designed to protect against overheating and potential damage to the heating system or surrounding environment.
The L444B20X0A2 Aquastat High Limit Relay features a robust and reliable design, with a brass body that ensures durability and resistance to corrosion. It is built to meet the demanding requirements of commercial and industrial heating applications, making it an excellent choice for larger heating systems.
The heart of this device is its high limit safety function. This function monitors the temperature of the heating system and disconnects the power to the heating element when it reaches a predetermined safe temperature. This helps prevent overheating and potential damage to the system caused by excessive temperatures.
The L444B20X0A2 Aquastat High Limit Relay also includes an aquastat function. This function allows for temperature control of the heating system by disconnecting the power to the heating element when the temperature drops below a set point. This ensures that the heating system maintains a consistent temperature and provides comfortable living or working conditions.
The device is easy to install, with terminal connections that accommodate standard 1/4 inch NPT threading. It also includes a clear and easy-to-read temperature dial, allowing for quick and accurate temperature adjustments.
The Honeywell L444B20X0A2 Aquastat High Limit Relay is a crucial component in any heating system, providing both temperature control and overheat protection. Its rugged design, ease of installation, and reliable performance make it an ideal choice for commercial and industrial heating applications.
Honeywell L444B20x0a2 Aquastat High Limit Relay is a crucial component in ensuring the safe and efficient operation of a boiler system. This relay functions by monitoring the temperature of the boiler and cutting off the power supply when the temperature exceeds a certain limit to prevent thermal overload. Here are some pros and cons of buying this particular model:
Pros:1. Reliable: Honeywell is a well-known brand in the HVAC industry, and this product is known for its durability and reliability.
2. Easy to Install: The L444B20x0a2 comes with clear installation instructions and can be easily integrated into most boiler systems.
3. Safety Feature: The high limit relay is a critical safety feature for any boiler system, and this model ensures that the boiler does not overheat, preventing potential damage or injuries.
4. Adjustable: The temperature limit is adjustable, allowing users to customize the setting to suit their specific boiler system and heating needs.
5. Energy Efficient: By preventing the boiler from overheating, this relay can help save energy and reduce utility bills.
Cons:1. Cost: Compared to other models in the market, the Honeywell L444B20x0a2 may be more expensive.
2. Limited Compatibility: This model may not be compatible with all boiler systems, so it's essential to check the specifications before purchasing.
3. Manual Reset: If the relay trips due to a fault, it may require a manual reset, which can be inconvenient.
4. No Display: This model does not come with a display, making it difficult to monitor the temperature in real-time.
In conclusion, the Honeywell L444B20x0a2 Aquastat High Limit Relay is a reliable and essential safety feature for any boiler system. Its durability, ease of installation, and adjustability make it a worthwhile investment for homeowners and businesses. However, its higher cost and limited compatibility are worth considering before making a purchase. Ultimately, if the boiler system is critical to daily operations or safety, it's essential to invest in a high-quality and reliable high limit relay like the Honeywell L444B20x0a2.
Details:
Honeywell L444B20X0A2 aquastat, item was removed from an working system, it tested and is working fine.
specifications centrafurn:
- brand: Honeywell
- mpn: L444b20x0a2
- non-domestic product: No
- type: Central Furnace
- ec range: A E
- heating system: Boiler
- country of origin: United States
offer centrafurn:
- options: ship-to-home
- started: march 28, 2026
- sold #: 12
- availability: in stock
- in stock #: 2
- prices: $60.00–$169.00
- item condition:
- New
- Used
payments centrafurn:
- other
- wallet: apple-pay
- credit card: visa
seller centrafurn:
- # reviews: 5011
- city: newark, new jersey
- rating: 99.6%
general centrafurn:
- category: Home & Garden > Heating, Air > Cooling Systems > Central Furnaces
shipping centrafurn:
- type: fixed
- transit: 4-9 days
- class: economy
- service: economy
returns centrafurn:
- paid by: buyer
- time: 60 days
- policy: returns accepted
- method: money back
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