HONEYWELL L8148G Aquastat Relay 1071 120V 0.2A

( Brand: Honeywell ), ( Manufacturer Part Number: L8148G ), ( Type: Aquastat Relay ), ( Voltage: 120 V ), ( Amperage: 0.2 A ), ( Material: Metal )

Review HONEYWELL Aquastat Relay 120v 0.2a

The **Honeywell L8148G-1071 Aquastat Relay (120V, 0.2A)** is a precision-engineered control device designed to provide reliable and efficient temperature regulation for residential and light-commercial heating systems. This high-performance relay serves as a critical interface between the Aquastat thermostat and the boiler or furnace, ensuring seamless operation while maintaining optimal system efficiency. Built with Honeywell s signature quality and durability, this relay is engineered to withstand frequent cycling and environmental fluctuations, making it an ideal choice for both new installations and retrofits. Its compact yet robust construction features a **120V AC, 0.2A** contact rating, delivering consistent and dependable switching performance without compromising on safety or longevity. The relay s internal design incorporates a **normally open (NO) contact configuration**, allowing for straightforward integration into existing wiring setups while minimizing the risk of electrical interference or premature wear. Whether used in forced-air systems, hydronic heating, or underfloor radiant heat applications, this Aquastat relay ensures precise temperature control, reducing energy waste and extending the lifespan of connected equipment. Its compatibility with Honeywell s Aquastat thermostats such as the **Aquastat 1071 series** makes it a seamless addition to any heating control system, offering peace of mind with its proven reliability and ease of installation. Perfect for both DIY enthusiasts and professional HVAC technicians, this relay exemplifies Honeywell s commitment to innovation and performance in residential climate control solutions.

The Honeywell L8148G-1071 Aquastat Relay (120V, 0.2A) is a temperature control relay used in HVAC systems to regulate heating or cooling based on temperature sensors. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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1. **High Reliability and Durability** Honeywell is a well-established brand known for producing high-quality control components. This relay is designed for long-term use in HVAC systems, with robust construction to withstand frequent switching cycles.

2. **Precise Temperature Control** The Aquastat relay is engineered to work with Honeywell Aquastat controllers, ensuring accurate temperature sensing and control. It helps maintain consistent heating or cooling in residential or light commercial applications.

3. **Low Power Consumption** With a current rating of only 0.2A at 120V, it is energy-efficient and suitable for applications where power draw is a consideration.

4. **Easy Installation and Compatibility** The relay is designed to integrate seamlessly with Honeywell s Aquastat systems, making it a straightforward replacement for faulty or outdated relays. It typically requires minimal wiring adjustments.

5. **Wide Application Range** It can be used in various HVAC setups, including furnaces, boilers, and radiant floor heating systems, where precise temperature regulation is required.

6. **Low Maintenance** As a mechanical-electrical component, it has few moving parts beyond the relay contacts, reducing the likelihood of wear-related failures over time.

7. **Industry Standard** Honeywell s products are widely used in the HVAC industry, meaning spare parts and technical support are readily available.

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1. **Limited Current Rating** The 0.2A rating means it is not suitable for high-power applications, such as large commercial HVAC systems or heavy-duty heating elements. For such uses, a higher-rated relay (e.g., 10A or 20A) would be necessary.

2. **Compatibility Issues with Non-Honeywell Systems** While it works well with Honeywell Aquastats, it may not be fully compatible with third-party temperature controllers or non-standard wiring setups. Always verify compatibility before purchasing.

3. **Potential for Contact Wear** Like all relays, frequent switching can lead to contact arcing or wear over time, eventually requiring replacement. However, this is typical for relays in general and not unique to this model.

4. **No Built-in Overload Protection** The relay does not include built-in protection against short circuits or excessive voltage spikes. Additional protection devices (e.g., fuses or circuit breakers) should be used in the circuit for safety.

5. **Cost Relative to Alternatives** While not expensive, it may be more costly than generic or no-name relays, especially if purchased from authorized Honeywell distributors. However, the trade-off is reliability and brand support.

6. **Limited Adjustability** The relay itself does not offer adjustable settings; its functionality is dependent on the Aquastat controller s programming. If fine-tuning is required, adjustments must be made at the controller level.

7. **Potential for False Triggers** In environments with electrical noise or poor wiring, the relay may occasionally misfire, leading to intermittent system failures. Proper grounding and wiring practices can mitigate this risk.

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The Honeywell L8148G-1071 Aquastat Relay is an excellent choice for **residential or light commercial HVAC systems** where precise temperature control is critical and the load does not exceed 0.2A. Its reliability, compatibility with Honeywell systems, and low power consumption make it a dependable component for applications like furnaces or radiant heating. However, it is not suitable for high-power applications or systems requiring higher current ratings. Additionally, users must ensure compatibility with their existing setup and consider supplementary protection devices for safety.

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- You are replacing a faulty relay in a Honeywell Aquastat-controlled HVAC system.

- Your application involves low-power heating or cooling (e.g., residential furnace, boiler, or radiant floor heating).

- You prioritize brand reliability and long-term performance.

- You have confirmed that the relay s 0.2A rating matches your system s requirements.

- Your system requires a higher current relay (e.g., for large heating elements or commercial HVAC).

- You are working with a non-Honeywell temperature controller and compatibility is uncertain.

- You are on a tight budget and are willing to risk potential reliability issues with a lower-cost generic relay (though this is not recommended for critical systems).

- For higher current needs, look for relays rated at 10A or 20A (e.g., Honeywell L8148G-1072 or similar).

- If cost is a concern, verify if a compatible generic relay (e.g., from a reputable brand like Cutler-Hammer or Square D) meets your system s specifications.

- Always check the wiring diagram and system manual to ensure the relay s voltage and current ratings align with your application.

In most standard residential HVAC setups where it is appropriately specified, this relay will perform reliably for years with proper installation.

Details:

Pulled from a still working Repack boiler.

part #: l8148g prices

• $150.00-$310.00

specifications hvaapa:

• brand: Honeywell
• mpn: L8148g
• type: Aquastat Relay
• voltage: 120 V
• amperage: 0.2 A
• material: Metal

returns hvaapa:

• policy: No Returns

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• city: Melrose, Massachusetts
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general hvaapa:

• condition: Used
• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Controls Circuit Boards

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• type: Calculated
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• carrier: USPS
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• transit: 5-10 Days

offer hvaapa:

• started: February 4, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0
• availability: In Stock
• best offers: True

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