🔥 Take control of your comfort with Honeywell’s smart, secure thermostat!
The Honeywell L641A1039 Cylinder Stat is a surface-mounted thermostat designed for domestic hot water cylinders. Featuring a snap action SPDT micro switch, tamperproof temperature settings, and easily accessible wiring terminals, it offers reliable, secure control for heating pumps, boilers, and zone valves. Its double insulation ensures durability, making it a trusted choice for indoor HVAC control.
| ASIN | B003DTIWGO |
| ASIN | B003DTIWGO |
| Backlight | No |
| Batteries | 2 AA batteries required. |
| Brand Name | Honeywell |
| Color | White |
| Connectivity Protocol | Wi-Fi |
| Controller Type | knob,manual |
| Customer Reviews | 4.6 4.6 out of 5 stars (723) |
| Customer reviews | 4.6 4.6 out of 5 stars (723) |
| Date First Available | 30 August 2012 |
| Finish Types | Mixed |
| Global Trade Identification Number | 05023220200093 |
| Included Components | Cylinder Stat |
| Is Discontinued By Manufacturer | No |
| Item Type Name | Cylinder Stat |
| Item model number | L641A1039 |
| Manufacturer | Honeywell |
| Manufacturer | Honeywell |
| Material Type | Plastic |
| Model Number | L641A1039 |
| Mounting Type | Surface Mount |
| Number of Batteries | 2 AA batteries required. |
| Power Source | AC |
| Product Dimensions | 8.5 x 8.5 x 8.5 cm; 240 g |
| Specific Uses For Product | Indoor use only |
| Unit Count | 1 Count |
| Voltage | 230 Volts |
M**G
Easy to fit and nice and compact unit to replace old type thermostat. Works well and temperature dial easy to adjust.
R**D
Fitted in place of British Gas CS1 (which is the same as a Drayton RTS3) which was asking for hot water constantly and wouldn't switch off. Normally we only have the water programmed on for an hour a day but one day left it on by mistake and I noticed the water was insanely hot / the boiler was heating it constantly! The existing hole in my tank's insulation was wide enough although I did scrape a little extra clearance with the end of the screwdriver. I also used the existing wire band as this saved faffing around altering the one included here. After isolating the electrics, I opened up both 'stats, took a photo of the wiring in the old one and simply connected the wires to the same terminals in this unit. It was literally as easy as 1-2-3! If you can wire a plug, you can wire one of these up. The price here - approx £15 including delivery - was half the price of Screwfix / Toolstation and judging by the reviews this item is more reliable than my previous 'stat (although I suspect the old one was 10+ years old). All in all it's an easy fix. My wife tried to convince me to call a plumber. I saved a call-out, an 'hour's' labour (it took me 15 mins!) charge and no doubt a significant mark up on the item (which they may have paid £30 + for!) - so around £60 in total savings! I'll pocket the £60 to spend on more interesting things. Easy as 1-2-3.
A**R
Great value. Easily fitted to tank
K**R
Works well
"**"
This is an excellent product and the support is great, it arrived on time. Recommended
Trustpilot
3 days ago
3 weeks ago