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Amazon£16.97Visit shop Unvented Components Europe White Alternative To Honeywell L641a1039 Cylinder Thermostat (Single)
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This B&Q Cylinder Thermostat is designed for surface mounting on domestic hot water cylinders, offering installers and maintenance engineers a dependable, simple, and accurate temperature control solution. Its key benefit is providing a direct, fully compatible replacement for models like the Honeywell L641A, ensuring seamless integration into existing systems. A potential caveat is its surface-mounting design, which requires specific installation considerations for optimal performance.
| Colour | White |
|---|---|
| Model Part Number | L641A1039 |
| Brand | B&Q |
This thermostat is a direct like-for-like replacement for the Honeywell L641A1039 Cylinder Thermostat.
The thermostat features an adjustable dial with settings up to 80°C.
The kit includes the thermostat unit, a cylinder strap with hooks, mounting screws, and a protective cap.
It is designed for surface mounting on domestic hot water cylinders using the provided strap and screws.
No, this is a standard mechanical thermostat and does not have smart home integration capabilities.
It is CE and UKCA marked, meeting relevant safety and performance standards.
It can directly switch a wet central heating circulating pump or boiler, or operate spring return and motor open/motor close zone valves.
Verify power supply to the heating system. Check wiring connections to the thermostat and heating components. Ensure the cylinder temperature is below the set point.
Check wiring connections. Confirm the temperature setting is not excessively high. Ensure the thermostat is making good contact with the cylinder.
Ensure the thermostat is securely strapped to the cylinder and making direct contact. Check for any obstructions or insulation preventing accurate temperature sensing.
Setup:
Compatibility:
This thermostat is designed as a direct replacement for Honeywell L641A models. It is suitable for use with wet central heating systems, circulating pumps, boilers, and spring return/motor open/motor close zone valves.
Care:
Clean the exterior of the thermostat with a soft, damp cloth. Avoid using abrasive cleaners or solvents. Ensure the protective cap remains in place to prevent dust and moisture ingress. Periodically check that the mounting strap remains secure.
