From 6e3c704a338b58c14b7ed81cf29bc357de2234fe Mon Sep 17 00:00:00 2001
From: Joost Lekkerkerker <joostlek@outlook.com>
Date: Sat, 30 Sep 2023 05:07:11 +0200
Subject: [PATCH] Return None when value is not known in OpenHardwareMonitor
 (#101127)

* Return None when value is not known

* Add to coverage
---
 .coveragerc                                            | 1 +
 homeassistant/components/openhardwaremonitor/sensor.py | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/.coveragerc b/.coveragerc
index 2f899999f41..533fd8de18d 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -898,6 +898,7 @@ omit =
     homeassistant/components/opengarage/cover.py
     homeassistant/components/opengarage/entity.py
     homeassistant/components/opengarage/sensor.py
+    homeassistant/components/openhardwaremonitor/sensor.py
     homeassistant/components/openhome/__init__.py
     homeassistant/components/openhome/const.py
     homeassistant/components/openhome/media_player.py
diff --git a/homeassistant/components/openhardwaremonitor/sensor.py b/homeassistant/components/openhardwaremonitor/sensor.py
index 70dbbd38fc8..4206bc72c1d 100644
--- a/homeassistant/components/openhardwaremonitor/sensor.py
+++ b/homeassistant/components/openhardwaremonitor/sensor.py
@@ -79,6 +79,8 @@ class OpenHardwareMonitorDevice(SensorEntity):
     @property
     def native_value(self):
         """Return the state of the device."""
+        if self.value == "-":
+            return None
         return self.value
 
     @property