How do I change the address codes of my RT300RF or RT500RF?

  • At the back of the thermostat there are five black jumpers numbered 1 to 5.
  • For example, take 2 and 4 out of the thermostat, turn the power of at the boiler
  • Take the receiver off the wall
  • Behind the receiver there are 5 switches 1 to 5 put 2 and 4 down
  • Put the receiver back onto the wall
  • Turn the power back on for the boiler then
  • Press reset on the thermostat this will change the frequency

What setting should my receiver be on to work with my thermostat?

The receiver should be on the auto setting (manual is the override)

What setting should my thermostat be on to work with my receiver?

The thermostat should be on the auto setting (manual is the override)

My heating comes on at random times... Why?

You may be getting RF interference, please see our video on our website on how to change the RF address code. Click here to see video.

I’ve put the same time in twice on my programs... is that OK?

Your RT500RF doesn’t recognise the same time twice, please change the time by at least Ten minutes for the unit to work correctly.

Will I lose my set programs if I change the batteries?

If your product is the RT500RF, open the door on the right-hand side and pull the flap down to the battery compartment. Replace 1 battery at a time and your programme will save.

Do you have an app for RT500RF of RT300RF?

No, The RT300 & RT500RF are not Internet thermostats and do not require an app.

My heating will not go higher than 5 degrees... why?

You are in frost mode, please deactivate and the frost symbol will disappear.

How do I replace the batteries in my RT500RF or RT300RF?

  • RT500RF open the door on the right-hand side and pull the flap down to the battery compartment.
  • RT300RF pull the right-hand side of the case to open the battery compartment.

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