diff --git a/monitor/tach_sensor.cpp b/monitor/tach_sensor.cpp
index 96fc06b..83285b9 100644
--- a/monitor/tach_sensor.cpp
+++ b/monitor/tach_sensor.cpp
@@ -239,7 +239,7 @@
 
     if (!timerRunning() || mode != _timerMode)
     {
-        log<level::INFO>(
+        log<level::DEBUG>(
             fmt::format("Start timer({}) on tach sensor {}. [delay = {}s]",
                         mode, _name,
                         duration_cast<seconds>(getDelay(mode)).count())
diff --git a/monitor/tach_sensor.hpp b/monitor/tach_sensor.hpp
index dc61074..0012a02 100644
--- a/monitor/tach_sensor.hpp
+++ b/monitor/tach_sensor.hpp
@@ -250,7 +250,7 @@
      */
     inline void stopTimer()
     {
-        phosphor::logging::log<phosphor::logging::level::INFO>(
+        phosphor::logging::log<phosphor::logging::level::DEBUG>(
             fmt::format("Stop running timer on tach sensor {}.", _name)
                 .c_str());
         _timer.setEnabled(false);