diff --git a/homeassistant/components/honeywell/climate.py b/homeassistant/components/honeywell/climate.py
index 7398ada23be..1df5eb9601b 100644
--- a/homeassistant/components/honeywell/climate.py
+++ b/homeassistant/components/honeywell/climate.py
@@ -294,7 +294,7 @@ class HoneywellUSThermostat(ClimateEntity):
     def hvac_action(self) -> HVACAction | None:
         """Return the current running hvac operation if supported."""
         if self.hvac_mode == HVACMode.OFF:
-            return None
+            return HVACAction.OFF
         return HW_MODE_TO_HA_HVAC_ACTION.get(self._device.equipment_output_status)
 
     @property
diff --git a/tests/components/honeywell/snapshots/test_climate.ambr b/tests/components/honeywell/snapshots/test_climate.ambr
index f26064b335a..1e9958acb3f 100644
--- a/tests/components/honeywell/snapshots/test_climate.ambr
+++ b/tests/components/honeywell/snapshots/test_climate.ambr
@@ -12,6 +12,7 @@
     ]),
     'friendly_name': 'device1',
     'humidity': None,
+    'hvac_action': <HVACAction.OFF: 'off'>,
     'hvac_modes': list([
       <HVACMode.OFF: 'off'>,
       <HVACMode.HEAT_COOL: 'heat_cool'>,