Honeywell Home L4006A1959/U High /Low Limit Aquastat Controller
Special Order: typically 2–6 weeks
Ships directly from the manufacturer. This is an estimated lead time, not a guaranteed delivery date.
Availability can change and lead times may be longer. If your project has a deadline, check with us before ordering.
A member of our team will check with the manufacturer and personally reply by email.
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Key Features
- Protects boilers and hydronic systems by maintaining reliable high/low temperature limits to reduce downtime and costly repairs
- Adjustable high and low setpoints for precise temperature monitoring and consistent system performance
- OEM Honeywell Home part (L4006A1959/U) for easy replacement and assured compatibility with existing controls
- Simple installation and robust mechanical design minimize service time and extend equipment life
- Integrates with building monitoring, HVAC control and security systems for centralized system surveillance and alerts
Quick Specifications
- Product Model
- L4006A1959/U
- Brand Name
- Honeywell Home
- Manufacturer Part Number
- L4006A1959/U
Explore the details
Product information
L4006A1959/U
Overview
Protect boilers and hydronic systems with the Honeywell Home L4006A1959/U High/Low Limit Aquastat Controller, engineered to provide dependable temperature monitoring and fail-safe protection. This Temperature & Flood Sensors product offers adjustable high and low setpoints, enabling precise control over system temperatures to prevent overheating or freezing and reduce maintenance interruptions. As an OEM Honeywell Home part (L4006A1959/U), it’s a direct-replacement solution that simplifies installation and shortens service time for contractors and facility managers. Designed for commercial and industrial HVAC applications, the controller integrates easily into building monitoring and security platforms, supporting consolidated surveillance and automated responses. Durable construction and clear terminal access ensure reliable long-term operation in demanding environments. Ideal for boiler safety, pump control, and centralized facility monitoring, the L4006A1959/U helps protect equipment assets while improving operational efficiency. Specify this aquastat controller for your next preventive maintenance or retrofit project to enhance system protection and control.
Features
- Protects boilers and hydronic systems by maintaining reliable high/low temperature limits to reduce downtime and costly repairs
- Adjustable high and low setpoints for precise temperature monitoring and consistent system performance
- OEM Honeywell Home part (L4006A1959/U) for easy replacement and assured compatibility with existing controls
- Simple installation and robust mechanical design minimize service time and extend equipment life
- Integrates with building monitoring, HVAC control and security systems for centralized system surveillance and alerts
| General Information | |
|---|---|
| Brand Name | Honeywell Home |
| Manufacturer Part Number | L4006A1959/U |
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Is this right for your project?
Confirm the model, required accessories and delivery needs before ordering.
- SKU:
- L4006A1959U
- Manufacturer part:
- L4006A1959/U
How do I confirm compatibility?
Check the specifications and manufacturer documents for your existing system. Send us your model numbers and project requirements if you need help selecting equipment or accessories.
Ask a product specialistWhen will this item ship?
Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.
Shipping, freight and delivery detailsWhat should I know about returns?
Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.
Read return eligibility and exclusionsHoneywell Home L4006A1959/U High /Low Limit Aquastat Controller
L4006A1959/U