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Check your heater's status

Find your Cala's device ID, Wi-Fi network, temperatures and what it's doing right now on your Cala's screen.

Updated October 31, 2026

Your Cala's screen can show its ID, its Wi-Fi network, its temperatures and what it's doing right now. This is handy when Cala support asks you about your heater.

Open Device Status

  1. On your Cala's screen, press any button to wake it. The Home screen appears.

  2. Press Down until SETTINGS is highlighted, then press Select.

  3. With DEVICE STATUS highlighted, press Select. The STATUS screen opens.

    STATUS screen showing Device Id:, Build:, Wi-Fi SSID:, MAC:, the Errors rows and the first temperatures
    The top of the STATUS screen.

  4. Press Down to scroll further down the list, and Up to scroll back.

What Device Status shows

  • Device Id: your heater's unique ID. Support may ask for this.
  • Build: the software your heater is running.
  • Wi-Fi SSID: the name of the Wi-Fi network your heater uses.
  • MAC: your heater's network address.

Errors

Under Errors there is one row each for Sensor:, OTA:, Heat Source:, Element:, Leak: and Connectivity:. A value that ends in OKAY means there's no problem. If a row shows anything else, read it out to Cala support.

STATUS screen scrolled down: every Errors row ends in OKAY, followed by the tank temperatures
Every Errors row ends in OKAY when there is no problem.

Temperatures

Under Temperatures you see readings from inside the tank (Upper Temp:, Top Temp: and Lower Temp:), Max Temp Setpoint: and Delivery Temp:, the temperature of the water leaving your Cala.

See more detail

  1. On the STATUS screen, press Select. The DETAILED STATUS screen opens.

    DETAILED STATUS screen showing TARGET TEMPERATURES and SENSORS readings
    The top of the DETAILED STATUS screen.

  2. Press Down to scroll through the sections, and Up to scroll back.

  3. Press Back to return to the STATUS screen.

Useful sections in Detailed Status

  • ELEMENTS: Upper Active: and Lower Active: show On when an electric heating element is heating the water, and Off when it isn't.
  • WATER SENSORS: Leak Detected: and Drip Tray Overflow: show On if Cala has found water where it shouldn't be. See Leak and heat pump alarms.
  • BOOST MODE: Boost Mode: shows On, Scheduled or Off, with the Boost Start Date: and Boost End Date:. See Boost for extra hot water.
  • SOLAR & BATTERY: the solar and battery details Cala has received. You change these in the Cala app or Home Assistant, not here. See Set up Solar & Battery.
  • GRID: Grid Status: shows On grid or Off grid, and Off-Grid Policy: shows how Cala heats while your home is off the grid. See Send solar, grid and battery data from Home Assistant.