Salus Quantum Hard Wired Thermostat - SQ610

The Salus Quantum hard wired thermostat, part SQ610, is a mains-powered room thermostat from the Salus Controls Quantum range. It regulates room temperature by switching the heating circuit on and off, working with a combi boiler and a smart control setup. The unit runs from a 230V supply and handles a maximum switching current of 3A, with an adjustable setpoint range of 5°C to 35°C.

• The boiler does not fire when the room temperature drops below the setpoint.
• The display is blank, dim or flickering despite a live 230V supply.
• The thermostat reads a room temperature that clearly differs from a separate thermometer.
• Heating stays on continuously and does not respond to setpoint changes.
• Time and temperature settings are lost or the unit resets at random.

• Isolate the mains supply at the consumer unit before removing the existing thermostat from its backplate.
• Check the existing wiring arrangement and confirm the replacement suits a 230V hard wired installation rather than a low-voltage or battery-fed one.
• Note whether app or remote control is needed, as Wi-Fi operation requires a separate gateway or hub.
• Record the existing thermostat model and wiring terminals so the new unit can be matched to the same circuit.