I have a remote/wireless room stat for the above boiler. Granted it's a few years old but still working. Anyway the stats info sometimes disappears and when I push the battery compartment up it sometimes comes back to life. After taking the batteries out and prising the terminations out it sometimes comes back to life after a few pushes and I have to re-programme it. Is there an alternative/compatible wireless stat I can replace it with or is there a remedy to keep the stat from losing it's info. Thanks