Schlüter®-DITRA-HEAT-E-WiFi FAQ | Schlüter-Systems


Which functions work in which modes?

Error Messages - WiFi Thermostat

If a fault or error occurs, the thermostat will display one of the following error messages:

E0: Internal failure. The thermostat is defective. Contact your heating engineer.
The thermostat must be replaced.

E1: Internal sensor defective or short-circuited. Contact your heating engineer.
The thermostat must be replaced.

E2: External wired floor sensor disconnected, defective or short-circuited.
Contact your heating engineer for reconnection or replacement.

E5: Internal overheating. Contact your heating engineer in order to have the
installation inspected.


Frequently asked questions

Can the DITRA-HEAT-E-WiFi be installed to replace an existing Schluter thermostat?

Can I use the Schluter DITRA-HEAT-E-WiFi thermostat with non-Schluter floor-warming cables and mats?

Where do I purchase the Schluter WiFi thermostat?

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From your local distributor

When will the Thermostat be available for purchase?

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1st July 2018

Will the WiFi thermostat be included in DITRA-HEAT-E kits?

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Yes, in the DUO kits

Can DITRA-HEAT-DUO-MA be installed above an insulation board?

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No, if an insulation board is being used on the floor DITRA-HEAT-MA should be used

How do I install the WiFi thermostat?

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Using the Instructions in the booklet. Essentially it's the same method as for any floor heating thermostat. There is no additional hardware required other than a WiFi signal and a Router with good connectivity.

What temperature will my heated floor reach?

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5 - 40°C, but the normal comfortable range is 28 - 30°C

Why is the room temperature displayed on the thermostat different to that shown on the App?

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The thermostat is accurate to 0.1°C whereas the App is only to 0.5°C

How do I suspend my program for an hour/day/week/indefinitely?

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Using the 'Manual', 'Holiday', 'Frost Protection', 'Boost', 'Comfort' or 'Eco' settings

When there is a power outage, will the thermostat hold the set point temperature and schedule settings?

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Yes, for up to 5 years

Will my floor still heat once the power gets back following a power failure?

How long does the thermostat maintain the settings after the power has been switched off?

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5 years

Can I lock my thermostat so that no one can change the settings?

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Yes, using the 'Child Lock' function within the 'User Settings' menu

What is the maximum length the sensor cable can be extended to?

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From 3 meters to 30 meters

The heating cable has a earth wire but the thermostat has no terminal for the earth wire. What shall I do with the earth wire?

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It should be connected to a metal back box or terminated in a terminal block

What can I use to clean the screen on my thermostat?

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You can use a microfibre/soft damp cloth

Can I override the automatic time setting feature and manually set my clock?

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Yes, go to 'User Settings', press the 'Time' button and manually set the time

Does the adaptive function reset when I make a factory reset?

What is the maximum time the thermostat can start before a scheduled start when the adaptive function is active?

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4 hours

When I change the set-point temperature on my thermostat does it change in the App?

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The zone temperature doesn’t change but the thermostat temperature does.

My installer forgot to install the floor sensor. Can I still use the thermostat?

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Yes, select 'Sensor Application' from the 'Engineer Settings' menu and change the setting to 'Room'. This will enable you to control temperature by measuring ambient room temperature rather than floor temperature.

How do I adjust the brightness of the thermostat display?

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Select 'User Setting' from the menu, then 'Display Brightness' and adjust it using the up and down arrows

How do I change the language setting on the thermostat?

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Select 'User Settings' from the menu, then press the 'Language' button and make the selection

Is the DITRA-HEAT-E-WiFi thermostat compatible with both iOS and Android apps?

How do I download the Mobile App?

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From Google Play or the App Store - Search for 'Schlüter HEAT CONTROL'

How do I connect to the WiFi and setup?

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Follow the prompts in the thermostat's 'App Control' menu and described in the Getting Connected Guide

Is the ability to control the unit over WiFi limited to within the home network?

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No, as long as the unit is connected to WiFi, you can control it remotely via the App eg. turn your floor heating on when you land at the airport.

What if I have forgotten my password?

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On the thermostat, within the 'App Control' menu press the 'Remove from app' button. Then on the app press the 'Getting Started!' button and follow the instructions, re-entering your user name and password when prompted.

How will my thermostat accept software updates?

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The thermostat will not accept software updates but the Schlüter HEAT-CONTROL app will.

How will my system work if my Wi-Fi is disconnected or disabled?

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The thermostat will function as a regular programmable thermostat

How do I connect multiple thermostats to one account? How many can I connect?

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The thermostats will automatically be in one account, if they all have been registered with the same account details. There is no limit on the number of thermostats that can be in one account.

Can I control the thermostat with more than one smartphone?

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Yes. Once the thermostat is connected to the first smartphone or tablet, use the same app profile, username and password on each additional smartphone or tablet. There is no limit on the number of smartphones that can control one thermostat.

When using my smartphone's data network why doesn't the App always respond?

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It may be that the 2G or 3G networks are too slow, causing time outs before the data is received. Use 4G or a WiFi network to ensure the best possible connection.

I no longer want to use the Wi-Fi connectivity of my DITRA-HEAT-E-WiFi thermostat. How do I turn off this feature?

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Using the 'Remove from App' button within the 'App Control' menu in the thermostat

I have deleted a thermostat from the App (by tapping on the 'Remove From App' button on the thermostat). Why doesn't the thermostat disappear from the App?

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This can occur if the thermostat is not currently connected to the server, meaning the App will not get the instruction to delete the thermostat. Once communication between the thermostat and server is re-established the thermostat will disappear from the App.

To what extent is the DITRA-HEAT-E compatible with Smart Home hubs such as Samsung SmartThings, Wink, Amazon Alexa, Google Home, Apple HomeKit etc? (... now and in the future)

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Currently the thermostat is not compatible but we are working on it.

How do I unregister my thermostat from a previous account?

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Using the 'Factory Reset' button within the 'Engineer Settings' menu in the thermostat

How does the WiFi thermostat and App work?

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The WiFi Thermostat needs to be connected to a network with internet access. If there is no connection between thermostat and internet the system will work as an offline thermostat. The thermostat is connected to the internet through a 2.4 GHz WiFi router. The connection to the router is done through the thermostat menu “App Control”. The thermostat can be connected to the router either by WPS or by manual set up (subject to the appropriate support of WPS by the router). The thermostat now communicates with the OJ Electronics server. When the thermostat is connected to the router, and thereby the internet, the thermostat can be connected to the App. Both the thermostat and smart-device with the App used to control the thermostat have to be connected to the same 2.4 GHz network for this to work. The App which should be downloaded from Google Play or the App Store, depending on the smart-device, is now to be installed on the smart-device (Apps are specific to different Thermostats so make sure to use the right App for your 2” WiFi thermostat). The Thermostat and App are connected by following the procedure in “Menu/App Control/Connect to App”. During the setup the App verifies the thermostat from the thermostat’s ID, ensuring that the communication between them is secure and seamless. When the connection from the App to the server is established and the App is connected to the thermostat, the thermostat and smart-device with the controlling App no longer have to be connected to the same network. The App will now be able to control the thermostat as long as both the thermostat and smart-device with the controlling App are connected to the internet and thereby the server maintaining the communication between them.

Why can’t the thermostat find my WiFi network?

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The thermostat operates in the 2.4 GHz range. That could explain why the thermostat does not see the network and why the smartphone does, because it operates in both the 2.4 and 5.0 GHz ranges. Most routers will broadcast two networks, one SSID on the 5.0 GHz radio and one SSID on the 2.4 GHz radio.

Why won’t the thermostat connect to my WiFi network?

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You may be too far away from your WiFi router or there may be a problem with it. Try connecting another device, such as your mobile phone, to your wireless network. Stand next to your WiFi thermostat and access your phone’s wireless network settings. If the wireless network signal cannot be detected by your phone, or if it is very weak, other devices may also have trouble connecting to the network from the same area of your home. If you are too far away from your WiFi router, you can purchase a WiFi signal booster which will improve the range of the WiFi signal in your home for all devices.

I’m concerned about the security of my data. What security protocol does the thermostat use?

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With so many home devices now connected to the Internet, we want to make sure that your WiFi Thermostat is connected to a secure network so that hackers cannot gain control of devices in your home. WiFi routers use two main types of protective encryption - WEP and WPA. WEP is the original form of encryption and provides very little security. Hackers can very easily break into your wireless network if your router is set up for WEP encryption. WEP encryption was replaced with WPA encryption in 1999 and WPA2 in 2006. WPA is a security protocol that makes it much more difficult to break into networks. Your WiFi Thermostat currently supports WPA and WPA2 encryption only. If your router was manufactured after 2003, you should be able to change the setting from WEP to WPA by following the guide in the link Your WiFi Thermostat can still control your underfloor heating system without a wireless network connection. As the best course of action, the manufacturer recommends that you upgrade your security settings to properly protect your network from hackers. If that is not possible, contact your network administrator.

Why can’t I connect to my WiFi router even though there is a good signal?

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Some WiFi routers limit the number of wireless devices that can connect to the Internet. To test whether this is the problem, shut down one of the other WiFi-enabled devices in your home. Once that device is completely shut down, try once again to connect your WiFi Thermostat to the network. If the WiFi Thermostat connects successfully, consult the documentation for your access point or contact your Internet Service Provider (ISP) to find out if you can increase the number of simultaneous connections to your WiFi network.

Some WiFi routers broadcast a stronger signal than the WiFi Thermostat. If this is the case, the WiFi Thermostat can see the WiFi router, but the WiFi Thermostat cannot reach the WiFi router.

The problem might be your router (even if your other wireless devices are still connected). A simple restart of the router will usually resolve such problems. While most routers simply have to be unplugged and then plugged back into their power source to restart them, you should refer to your router’s documentation for specific instructions. Maybe your WiFi router firmware needs to be updated. If so, contact your ISP or the router manufacturer for instructions on how to update the firmware.

Maybe other devices are interfering with the wireless signal. If so, try turning off other wireless devices (Bluetooth, WiFi, wireless phones/cameras) that may cause interference, then test the WiFi thermostat’s network connection.

Contact Schlüter-Systems Ltd

Units 3-5 Bardon 22,
Beveridge Lane, Coalville,
Leicestershire, LE67 1TE
Phone: +44 (0) 1530 813396

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