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Honeywell L641A Hot Water Cylinder Thermostat
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arn4642 (7)
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Price:
£19.88
+ £2.94 postage
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The Honeywell Home L641A Cylinder Thermostat is a programmable thermostat designed for heating and cooling systems. It features a rectangular shape, a white colour, and is surface-mounted. The thermostat is powered by a corded electric connection with a voltage of 230V, making it compatible with a universal range of heating systems. With a simple control style using a rotary knob, this thermostat is programmable with one period per programmable day, and it is equipped with temperature sensor technology. Manufactured in the United Kingdom, this Honeywell thermostat offers efficient system switching with heat-off functionality.
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About this product
Product Identifiers
BrandHoneywell
MPNL641A1039
EAN5023220200093, 0050233020337, 5060407633749
UPC5023220200093, 0050233020337, 5060407633749
ModelHoneywell L641A
eBay Product ID (ePID)2254757124
Product Key Features
Power SourceCorded Electric
Compatible ProductUniversal
Control StyleRotary Knob
Compatible BrandUniversal
MountingSurface-Mounted
Thermostat ShapeRectangular
Cool StagesNone
ProgrammabilityProgrammable
ColourWhite
Voltage230 V
FeaturesMini, Adjustable Thermostat
Compatible ModelUniversal
MaterialPlastic
Sensor TechnologyTemperature
System SwitchingHeat-Off
All listings for this product
Ratings and reviews
Most relevant reviews
- 15 Nov, 2018
Long lasting thermostat
I bought this thermostat to replace an earlier model of the same 'stat - the old one had only lasted thirty two years!!! This thermostat has 'change over' contacts - these are required if you have a 'Y' Plan system, A thermostat with only make or break contacts would not allow a 'Y' Plan system to work correctly. If you are not sure of your system, Google 'Y Plan heating system, although this 'stat will work on other systems. Very easy to fit, although I would recommend that you either take a photograph or make a drawing of the wiring on the old unit to make sure that you get it right first time. I am now hoping that the new one will last for 32 years.Verified purchase: YesCondition: New
- 07 Feb, 2025
Great thermostat !
Trivial to fit - highly recommended. DIY job - no plumber required. I now have piping hot water.Verified purchase: YesCondition: New
- 28 Oct, 2020
Good quality products
The product was received in time and was reasonably priced. Looks genuine Honeywell product. Fitting took about 30 minutes. Did not have to use the strap as I used the existing strap. There should be an option to buy without the strap to make the price cheaper. Let's see how it functions as the old one lasted nearly 30 years.Verified purchase: YesCondition: New
- 14 Jul, 2023
Honeywell Quality Product.
Good quality product and a decent price. Easy to fit and with a large temperature range.Verified purchase: YesCondition: New
- 04 Nov, 2020
Excellent product.
Very reasonable price, well made and very reliable which is important as the complete safety and integrity of my domestic heating system relies on this unit. Until recently wood burning boiler stoves were not routinely fitted with a draught cut off if the water failed to circulate and the fire stoking was continued. This thermostat controls the pumps & zone valves of my system, if it failed to operate it is possible a serious explosion or fire could resultVerified purchase: YesCondition: New
- 10 Sep, 2025
always use honeywell products cylinder s...
always use honeywell products cylinder stat 100%Verified purchase: YesCondition: Pre-owned
- 18 Dec, 2023
Perfect
Replaced a 40 year old Honeywell thermostat. Like for like replacment - Hope this one lasts as long!Verified purchase: YesCondition: New
- 11 Nov, 2020
manufactures item
Exact replacement for my broken one,works fine,easy to replace.(see video on Google).!Verified purchase: YesCondition: New
- 15 Aug, 2025
great product
Bought to replace an existing one that had disintegratedVerified purchase: YesCondition: Pre-owned
- 19 Mar, 2020
Easy to replace original Honeywell from 1973.
Replacement for original Honeywell from 1973! Not as tough looking but works fine and looks fine. Installed in 15 mins. but no earth connection terminal so has to rely on tank being earthed.Verified purchase: YesCondition: New
