Thermostat emits a beeping sound or warning icon without a specific error code; heating may still work.

Safety first: Low risk; follow on-screen prompts.

• Check on-screen message: Look for icons indicating battery, RF signal, or maintenance.
• Replace batteries: If a battery icon is shown, install fresh alkaline batteries.
• Check connectivity: If a signal icon is shown, verify RF link to receiver or Tydom gateway.
• Reset maintenance timer: If it is a service reminder, reset the timer according to the manual after the system has been serviced.

If warnings persist without clear cause, consult the model-specific manual or a professional.