diff --git a/Weather/SerialReader/Controllers/HealthController.cs b/Weather/SerialReader/Controllers/HealthController.cs
index 299481e..5a4e85c 100644
--- a/Weather/SerialReader/Controllers/HealthController.cs
+++ b/Weather/SerialReader/Controllers/HealthController.cs
@@ -21,7 +21,7 @@ namespace ChrisKaczor.HomeMonitor.Weather.SerialReader.Controllers
             var lastReading = SerialReader.LastReading;
             var timeSinceLastReading = DateTimeOffset.UtcNow - lastReading;
 
-            return timeSinceLastReading <= _checkTimeSpan ? Ok(lastReading) : BadRequest(lastReading);
+            return SerialReader.BoardStarted && timeSinceLastReading <= _checkTimeSpan ? Ok(lastReading) : BadRequest(lastReading);
         }
     }
 }
diff --git a/Weather/SerialReader/SerialReader.cs b/Weather/SerialReader/SerialReader.cs
index 552ad9b..662b81e 100644
--- a/Weather/SerialReader/SerialReader.cs
+++ b/Weather/SerialReader/SerialReader.cs
@@ -55,7 +55,6 @@ namespace ChrisKaczor.HomeMonitor.Weather.SerialReader
 
                     WriteLog("Opening serial port");
 
-                    serialPort.ReadBufferSize = 10 * 1024;
                     serialPort.Open();
 
                     BoardStarted = false;