diff --git a/homeassistant/components/flexit/climate.py b/homeassistant/components/flexit/climate.py
index b833617f2ca..85d5e9f4eac 100644
--- a/homeassistant/components/flexit/climate.py
+++ b/homeassistant/components/flexit/climate.py
@@ -69,6 +69,7 @@ class Flexit(ClimateEntity):
         ClimateEntityFeature.TARGET_TEMPERATURE | ClimateEntityFeature.FAN_MODE
     )
     _attr_temperature_unit = UnitOfTemperature.CELSIUS
+    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self, hub: ModbusHub, modbus_slave: int | None, name: str | None