ESI Controls Electronic Dual Cylinder Thermostat

This is a great unit and exactly what I wanted. Finally a thermostat that accurately lets you set the required temperature, and also tells the tank temperature all other items on the market are guess work. Easy to install and works, however the instructions are a little unclear in regards to the 1 hour boost. I have tried everything and whist the unit works perfectly when it is turned on for the first time and the one hour boost is set on it just gets to preset temp and then turns off Not sure if unit is faulty or just the one hour boost doesn’t work if you set the desired temperature, not clear Still giving 5 stars as for the price it’s the best unit I have seen

The thermostat comes with good clear instructions which makes installation easy. It requires its own mains power source and the tank needs to be pocketed in order to insert the temperature sensors. The thermostat has been installed for about six weeks now and is working very well. The big dial makes it easy to set the target temperature and the LCD shows the water temperature clearly. There is also an LED which shows when the system is demanding heat. Together, they make it easy to see whether everything is working correctly, which is helpful if you need to problem solve. Setting the temperature accurately lets you balance economy versus the hot water that you need.

- The thermostat is super easy to install, which is a huge plus. No need to call in a professional, just follow the instructions and you're good to go. - Love how it helps save on energy bills. It's efficient and does its job without any fuss, which is exactly what I was looking for. - The design is sleek and fits well with the decor. It doesn't stick out like a sore thumb, which is always a bonus. - The controls are straightforward and user-friendly. No complicated settings, just simple and effective. - The temperature accuracy is spot on. It keeps the water just right, which is perfect for those chilly mornings. **What could be better:** - The display could be a bit brighter. It's sometimes hard to read in low light, which can be a bit annoying. - Would be great if it had a Wi-Fi feature. Being able to control it remotely would add a lot of convenience. - The manual could use a bit more detail. Some parts were a bit vague, and I had to figure things out on my own.

Works great

Replaced my broken thermostat with this, it was easy to fit and worked no problems

Very easy to instal and instructions were very clear for whatever system you have. Note: Someone in the reviews gave this a 2 star And it states two people found this helpful... I don't think they understand how these systems work and probably shouldn't have installed it themselves. They said they did not think it was right that 230V went to the com port. Com stands for common, Not Communication, Which is what I think they thought it meant. They would have seen this if they RTFM.

Our thermostat failed on Sunday and i found exactly the same one on Amazon and it was delivered the next day. easy to fit as it was exactly the same. That said, the original one was less than 2 years old, so it probably should have lasted a bit longer. Heating is working again, so its a small price to pay..

I bought this to replace an existing item of the same make and model. The previous item had been in operation for a little over 6 years but this item lasted less than 3 months before it stopped working. I would expect an item of this type to last for about 10 years so have concerns regarding the build quality and durability of the item. Fortunately Amazon have agreed to process a refund so I’ll get a plumber to fit a more reliable model.