BOILER SERVICE REMINDER
By Law, your gas boiler should be inspected once a year to ensure it is operating
safely. Your ST9400S Programmer has a range of features designed to help make
sure this service is carried out at the correct time. These features will be programmed
by your Installer, maintenance Engineer, or Landlord.
• If it has been set to do so, ST9400S will display a message on the screen to
remind you that a boiler service is due.
• If the service is overdue, the Programmer may switch off the heating system, to
ensure your safety. If this happens you must arrange an immediate service visit.
Contact details should be listed on page 19 of this guide, in the section Boiler &
System Service Log.
• A contact telephone number may also have been programmed into the ST9400S.
If so, a message will appear on the LoT™ Display indicating the number you
should call.
Countdown to Service
Your ST9400S can indicate a countdown for the
number of days until your service is due. This
message will appear on the screen every few
seconds, to give you an opportunity to schedule
a service visit.
When Service is Due
When your boiler service is OVERDUE the words
“SERVICE DUE” will continue to flash on your
screen, and you should arrange an immediate
service visit.
