diff --git a/homeassistant/components/nibe_heatpump/sensor.py b/homeassistant/components/nibe_heatpump/sensor.py
index 4d3ed237549c..675dfbf220bd 100644
--- a/homeassistant/components/nibe_heatpump/sensor.py
+++ b/homeassistant/components/nibe_heatpump/sensor.py
@@ -249,7 +249,8 @@ class Sensor(CoilEntity, SensorEntity):
         if state_class := NATURE_TO_STATE_CLASS.get(coil.nature):
             self._attr_state_class = state_class
 
-        self._attr_suggested_display_precision = ceil(log10(abs(coil.factor)))
+        if not coil.mappings:
+            self._attr_suggested_display_precision = ceil(log10(abs(coil.factor)))
 
     @override
     def _async_read_coil(self, data: CoilData):
diff --git a/tests/components/nibe_heatpump/snapshots/test_sensor.ambr b/tests/components/nibe_heatpump/snapshots/test_sensor.ambr
index ef8aeb40415e..7fe6a5c5d545 100644
--- a/tests/components/nibe_heatpump/snapshots/test_sensor.ambr
+++ b/tests/components/nibe_heatpump/snapshots/test_sensor.ambr
@@ -226,6 +226,56 @@
     'state': '0',
   })
 # ---
+# name: test_entities[Model.F1155-data0][sensor.supply_pump_state_ep14_43431-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.supply_pump_state_ep14_43431',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': None,
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': 'Supply Pump State EP14',
+    'platform': 'nibe_heatpump',
+    'previous_unique_id': None,
+    'suggested_object_id': 'supply_pump_state_ep14_43431',
+    'supported_features': 0,
+    'translation_key': None,
+    'unique_id': 'mock_entry_unique_id-43431',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[Model.F1155-data0][sensor.supply_pump_state_ep14_43431-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'F1155 Supply Pump State EP14',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.supply_pump_state_ep14_43431',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'OFF',
+  })
+# ---
 # name: test_entities[Model.SMOS40-data1][sensor.current_outdoor_temperature_bt1_30002-entry]
   EntityRegistryEntrySnapshot({
     'aliases': list([
diff --git a/tests/components/nibe_heatpump/test_sensor.py b/tests/components/nibe_heatpump/test_sensor.py
index b126c3357e32..bc16d4059cb4 100644
--- a/tests/components/nibe_heatpump/test_sensor.py
+++ b/tests/components/nibe_heatpump/test_sensor.py
@@ -26,7 +26,7 @@ async def fixture_single_platform():
 @pytest.mark.parametrize(
     ("model", "data"),
     [
-        (Model.F1155, {43005: 1234, 40004: 20.0, 40321: 50, 40317: 0}),
+        (Model.F1155, {43005: 1234, 40004: 20.0, 40321: 50, 40317: 0, 43431: "OFF"}),
         (Model.SMOS40, {40019: 1234, 30002: 20.0, 31855: 50}),
     ],
 )