Help needed please - no heating as my Towerstat transmitter is refusing to talk to its receiver

[BeautifulRedBoots]

Would really appreciate some help - I have trawled the internet; worked through the instruction manuals for my boiler and the thermostat, but I cannot fix the problem.

Worcester Greenstar 30Si compact boiler fitted by British Gas a few months ago.

TowerstatRF STTR/F thermostat control system fitted about ten years ago. Always worked fine, and British Gas man recommended that I keep it.

I cannot remember if the boiler installer checked that the heating worked - I would guess he would have.

I now find that the remote thermostat and the receiver are not communicating. Receiver has power, Thermostat working fine. I have tried changing the frequency.

Does anyone have any idea what else I can try?!
TIA

Are the batteries in the remote ok? Sometimes mine has a turn and I press a button on a small box by the boiler, that seems to make it kick in.

Batteries in the remote are fine (I had to get rid of a dead spider inside the thermostat to change them).
Where is the button you mention please?

clearly the batteries in the remote were not fine - I have just changed them again, and now all is fine!
Thank you for your help Vitalogy

That's great!