diff --git a/homeassistant/components/zwave_js/climate.py b/homeassistant/components/zwave_js/climate.py
index 14a3fe579c4899..c7ab579c2cb28a 100644
--- a/homeassistant/components/zwave_js/climate.py
+++ b/homeassistant/components/zwave_js/climate.py
@@ -24,8 +24,6 @@
     ATTR_HVAC_MODE,
     ATTR_TARGET_TEMP_HIGH,
     ATTR_TARGET_TEMP_LOW,
-    DEFAULT_MAX_TEMP,
-    DEFAULT_MIN_TEMP,
     DOMAIN as CLIMATE_DOMAIN,
     PRESET_NONE,
     ClimateEntity,
@@ -421,7 +419,7 @@ def extra_state_attributes(self) -> dict[str, str] | None:
     @property
     def min_temp(self) -> float:
         """Return the minimum temperature."""
-        min_temp = DEFAULT_MIN_TEMP
+        min_temp = 0.0  # Not using DEFAULT_MIN_TEMP to allow wider range
         base_unit: str = UnitOfTemperature.CELSIUS
         try:
             temp = self._setpoint_value_or_raise(self._current_mode_setpoint_enums[0])
@@ -437,7 +435,7 @@ def min_temp(self) -> float:
     @property
     def max_temp(self) -> float:
         """Return the maximum temperature."""
-        max_temp = DEFAULT_MAX_TEMP
+        max_temp = 50.0  # Not using DEFAULT_MAX_TEMP to allow wider range
         base_unit: str = UnitOfTemperature.CELSIUS
         try:
             temp = self._setpoint_value_or_raise(self._current_mode_setpoint_enums[0])
diff --git a/tests/components/zwave_js/test_climate.py b/tests/components/zwave_js/test_climate.py
index 9a4559de1a59df..5d711528a281ed 100644
--- a/tests/components/zwave_js/test_climate.py
+++ b/tests/components/zwave_js/test_climate.py
@@ -812,8 +812,8 @@ async def test_thermostat_heatit_z_trm2fx(
         | ClimateEntityFeature.TURN_OFF
         | ClimateEntityFeature.TURN_ON
     )
-    assert state.attributes[ATTR_MIN_TEMP] == 7
-    assert state.attributes[ATTR_MAX_TEMP] == 35
+    assert state.attributes[ATTR_MIN_TEMP] == 0
+    assert state.attributes[ATTR_MAX_TEMP] == 50
 
     # Try switching to external sensor
     event = Event(