Honeywell L641A1039 Cylinder Stat, 230 V

Q: I need a thermostat to show the tempereture of the hot water tank. It will consist of sensor wire 3 meters and an indicator to see the tempereture in

These units do not have a gauge attached. They are strapped on with an 'elasticated wire and make contact with the cylinder by cutting a suitable hole in the insulation. I'd think that there may well be a suitable gauge out there somewhere. I could do with one myself actually so I'll have a look on 'google' By the way I'd go for one that does not need to be powered and works on contact.

Q: why are there no screws to undo to hold the cable?

The unit comes with a flexible tie (same as that used for net curtains) that goes around the cylinder. This tie has hooks and the thermostat has eyes. Thus the hook and eye system keep the unit tight to the cylinder. Make are that the thermostat has metal to metal contact so that it can register the temperature of the hot water.

Q: Why does this say 2x AA batteries required, this should be mains?

100% no batteries required it is hard wired into your heating / hot water junction box.

Q: I have potterton ptt2 water cylinder thermostat with sensor which is obsolete now . would this honeywell l641a1039 be ok as a replacement

The Potterton PTT2 is not a conventional Cylinder Thermostat as it’s wired externally to the Tank with it’s own temp sensor. Sadly as you mentioned it’s now obsolete. The only option (if you can’t find another PTT2) is to replace it with a terminal box with heat resistant flex outlet to the new stat. Up to 3 wires from the original PTT2 will need to go to the new stat, new stat instructions will confirm it. Finally the live wires will then be redundant and will require to be either terminated or spurred to a new useful output (plug socket box, a lamp etc) Please ensure a qualified electrician does ANY electrical work or changes in your home heating setup.

4.6/5

Product ID: 48082193

Secure Transaction

Details

Brand
Honeywell
Model name
Cylinder Stat
Controller type
knob manual
Colour
White
Specific uses for product
Indoor use
Included components
Cylinder Stat

⚡230V Power

🔒Tamperproof Setting

🔧Easy Wiring

Frequently Bought Together

Honeywell L641A1039 Cylinder Stat, 230 V

HONEYWELL ST9400C Thermostat Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White, 1

Honeywell T6360B1028 Room Thermostat, 230/240V, White, 1

Description

🔧 Elevate Your Environment with Precision Control!

SAFETY FIRST - Double insulation ensures maximum safety for indoor use.
COMPACT MODERN - Sleek design fits seamlessly into any contemporary space.
PRECISION CONTROL - Experience unparalleled accuracy with the tamperproof temperature setting.
USER FRIENDLY DESIGN - Wiring terminals are easily accessible for hassle-free installation.
VERSATILE FUNCTIONALITY - Optional manual setting knob for customized temperature adjustments.

The Honeywell L641A1039 Cylinder Stat is a state-of-the-art temperature control device designed for indoor use. With a robust 230V power source, it features a snap action SPDT micro switch, easy-to-access wiring terminals, and a tamperproof temperature setting. This modern, compact unit is perfect for those seeking reliability and efficiency in their temperature management solutions.

Specifications

Manufacturer	Honeywell
Part Number	L641A1039
Product Dimensions	8.5 x 8.5 x 8.5 cm; 240 g
Batteries	2 AA batteries required.
Item model number	L641A1039
Colour	White
Style	Modern
Finish	Mixed
Material	Plastic
Power Source	AC
Voltage	230 Volts
Item Package Quantity	1
Switch Type	1-way
Plug profile	Surface Mount
Switch style	SPDT
Usage	Indoor use only
Included Components	Cylinder Stat
Batteries included?	No
Batteries Required?	No
Battery description	Not Included
Item Weight	240 g

Have a Question? See What Others Asked

I need a thermostat to show the tempereture of the hot water tank. It will consist of sensor wire 3 meters and an indicator to see the tempereture in

why are there no screws to undo to hold the cable?

Why does this say 2x AA batteries required, this should be mains?

I have potterton ptt2 water cylinder thermostat with sensor which is obsolete now . would this honeywell l641a1039 be ok as a replacement

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving over 300 million shoppers across more than 200 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

R2250

Duties & taxes incl.

South Africastore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews