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Why is my T-MO not following its schedule, and how do I change the temperature byhand?

Applies to: T-MO1, T-MO1B

Symptoms

  1. "I've set up a schedule but the temperature doesn't change."

  2. "There's no manual override."

  3. "I turned it up and later it went back down on its own."

  4. "I don't want to use the app. Can I just use the buttons?"

Why it happens

The T-MO runs a weekly schedule that you create in the T-MO app. The schedule only runs when it is switched on, and a change you make by hand lasts until the next scheduled change. Most "schedule not working" calls come down to the schedule being switched off, or a manual change being replaced by the next scheduled one.

How to fix it

  1. Check the schedule is switched on. In the T-MO app, open the schedule. The switch next to it is green when the schedule is on and running, and red when it is off. With the schedule off, the thermostat simply holds its current temperature.

  2. Wait for the next scheduled change. Switching a schedule on does not change the temperature straight away. For example, if it is 07:00, the thermostat is at 17°C and your schedule changes to 19°C at 08:00, it stays at 17°C until 08:00.

  3. Change the temperature by hand. On the thermostat, press the + button to raise the temperature or the - button to lower it, or change it in the app. If a schedule is running, your change holds until the next scheduled change, then the schedule takes over again.

  4. Copy your schedule to save time. In the app, you can copy and paste a day's settings to other days, and to other T-MO thermostats.

     

If that did not work:

Check what the display is showing. By default the display shows the temperature youhave set, not the measured temperature. Press any button to see the measured temperature. You can change what it shows in the app under "Temperature display".

Check the sensor mode. For underfloor heating with a floor probe, floor sensing (F) is recommended. If the mode is set to power regulating (PWER), the heating runs for a fixed share of the time and does not respond to temperature. Change the sensor mode in the app under "Sensor mode".

Check the time zone. The thermostat follows the time zone of the property's location set in the app, not your phone's time.

Check the buttons are not locked. If the display shows LOCK, hold the + and - buttons together for 10 seconds until it shows OPEN.

Using your T-MO without the app

The buttons on the thermostat let you change the temperature at any time. Schedules are created in the app only. Once a schedule is set, it is stored in the thermostat itself, so it keeps running with no Wi-Fi or Bluetooth connection.

If you do not want to connect to Wi-Fi, you can set up the schedule over Bluetooth with your phone within about 5m of the thermostat, then leave it to run. Your installer can also set everything up and transfer the property to your own T-MO account.

Remote support

Once you have your T-MO Thermostat connected to your Wi-Fi you can give us temporary support access so that we can check your settings, set up your thermostat and create your heating schedule for you. To do this you simply need to open the app, go to Settings, and then Support. Tick the checkbox to "Grant support access". We will then have access for 7 days.

Have a think about how you'd like your thermostat to work. We'll need to know things like:

  • What time do you want it to come on?

  • What time do you want it to switch off?

  • What temperature would you like it to heat to? 

Then give our support team a call on 01622 689 440 and we can interpret that, answer any questions you have and get your underfloor heating set up for you.

When to contact us

Contact us if the floor is still not heating with the right sensor mode and temperature set, or if the display shows an error code.

We can set up your thermostat remotely: in the app, go to Settings > Support and tick "Grant support access", which gives us access for 7 days.

Call 01622 689 440, or email support@thermosphere.com.

Have ready: your thermostat model (T-MO1 or T-MO1B), a photo of the display, the sensor mode, and whether a floor probe was fitted.

Safety

Checking or changing any wiring must be done by a competent electrician with the power isolated.