Honeywell Home L641A Cylinder Stat (40051)

£ 32.15INC VAT

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Honeywell Home L641A Cylinder Stat (40051)

Bi-metallic sensor. Surface-mounted. Control for boilers and wet central heating.

  • Suitable for Uninsulated & Foam-Lagged Cylinders
  • Surface-Mounted
  • Bi-Metallic Sensor
  • 1 Year Guarantee
  • Fixing Strap Included
  • Double-Insulated

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View all: Honeywell Home Cylinder Thermostats

£32.15INC VAT

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Honeywell Home L641A Cylinder Stat is rated 4.7 out of 5 by 19.
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Rated 5 out of 5 by from Tank thermostat. Replacement for a 15 year old faulty unit. Exactly the same as original, easy to fit and problem solved.
Date published: 2020-02-29
Rated 5 out of 5 by from Very pleased Arrived on time. Easy to fit and solved my problem. What else can you ask for
Date published: 2019-08-16
Rated 5 out of 5 by from Simple to fit Quick and simple to fit, just make sure that the elasticated cable length is correct before you screw in the hooks on the end, because once on you can't get them off! Good quality kit and Honeywell is a good brand.
Date published: 2019-07-01
Rated 5 out of 5 by from Direct replacement Was sorting some boiler controls out and found this stat to be faulty/ broken. At a late hour in the evening, managed to pick it up and secure the part. Straight swap. Price at the time didnt bother me. Honeywell is a good make, and didn't think I needed to reinvent the wheel.
Date published: 2018-12-07
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Can this cylinder stat be connected to the pump on the hot water side of my central heating to turn the pump on and off as the temperature in the cylinder rises and falls

Asked by: aberdeen1

how to id a fault

my water seems very hot and if heating is not on or on getting some Kettering , could the stat be duff and getting to hot at tank , i have replaced the 3 way valve
Asked by: bearthebear

At what temperature should I set the thermostat for reasonably hot water ?

Asked by: Bigmeds
The standard industry temperature is 60 degrees and we would recommend not setting a temperature that is too low for the standard to avoid Legionella bacteria growing in stored water vessels. We would also recommend not setting a temperature that is too high to avoid scalding.
Answered by: Honeywell Home Consumer Support
Date published: 2020-06-06

Wiring in

Can this unit be directly wired into a spur without using a timer?
Asked by: ulstermike

Does this act as a high limit stat as well as a thermostat?

Asked by: DANNY1234567
The L641 is a surface contact thermostat designed to sense the water temperature in storage cylinders and water pipes, and to provide temperature control, temperature limiting, and temperature feedback functions.
Answered by: Honeywell Home Consumer Support
Date published: 2019-09-09
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Specification
Brand Honeywell Home
Central Heating Control Type Thermostats
Insulation Type Double-Insulated
Manufacturer Guarantee 1 Year Guarantee
Model Name/No L641A
Model No L641A
Mount Type Surface-Mounted
Pack Size 1
Pieces in Pack/Case 1
Product Depth 55 mm
Product Height 85 mm
Product Type Cylinder Stat
Product Width 45 mm
Sensor Type Bi-Metallic Sensor
Suitable System Suitable for Uninsulated & Foam-Lagged Cylinders
Switching Capacity Resistive: 4A, Inductive: 2 A
Switch Type SPDT
Temperature Range 40 to 80 °C

Downloads

Instruction Manual