diff --git a/monitor/fan.cpp b/monitor/fan.cpp
index fa8b392..7bd1542 100644
--- a/monitor/fan.cpp
+++ b/monitor/fan.cpp
@@ -506,7 +506,7 @@
     }
 }
 
-void Fan::powerStateChanged(bool powerStateOn)
+void Fan::powerStateChanged([[maybe_unused]] bool powerStateOn)
 {
 #ifdef MONITOR_USE_JSON
     if (powerStateOn)
diff --git a/monitor/json_parser.cpp b/monitor/json_parser.cpp
index a46e2a9..1144998 100644
--- a/monitor/json_parser.cpp
+++ b/monitor/json_parser.cpp
@@ -198,7 +198,7 @@
         }
         // Valid deviation range is 0 - 100%
         auto deviation = fan["deviation"].get<size_t>();
-        if (deviation < 0 || 100 < deviation)
+        if (100 < deviation)
         {
             auto msg = fmt::format(
                 "Invalid deviation of {} found, must be between 0 and 100",
diff --git a/monitor/json_parser.hpp b/monitor/json_parser.hpp
index c6b64ec..7f09fd3 100644
--- a/monitor/json_parser.hpp
+++ b/monitor/json_parser.hpp
@@ -43,15 +43,13 @@
 /**
  * @brief Get the JSON object
  *
- * @param[in] bus - The dbus bus object
- *
  * @return JSON object
  *     A JSON object created after loading the JSON configuration file
  */
-inline const json getJsonObj(sdbusplus::bus::bus& bus)
+inline const json getJsonObj()
 {
     return fan::JsonConfig::load(
-        fan::JsonConfig::getConfFile(bus, confAppName, confFileName));
+        fan::JsonConfig::getConfFile(confAppName, confFileName));
 }
 
 /**
diff --git a/monitor/main.cpp b/monitor/main.cpp
index 0949c77..5ed0953 100644
--- a/monitor/main.cpp
+++ b/monitor/main.cpp
@@ -33,7 +33,7 @@
 
 using namespace phosphor::fan::monitor;
 
-int main(int argc, char* argv[])
+int main([[maybe_unused]] int argc, [[maybe_unused]] char* argv[])
 {
     auto event = sdeventplus::Event::get_default();
     auto bus = sdbusplus::bus::new_default();
diff --git a/monitor/system.cpp b/monitor/system.cpp
index aff3bdc..6e2ccfa 100644
--- a/monitor/system.cpp
+++ b/monitor/system.cpp
@@ -84,7 +84,7 @@
 #ifdef MONITOR_USE_JSON
     try
     {
-        jsonObj = getJsonObj(_bus);
+        jsonObj = getJsonObj();
 #endif
         auto trustGrps = getTrustGroups(jsonObj);
         auto fanDefs = getFanDefinitions(jsonObj);
@@ -231,7 +231,7 @@
 }
 
 const std::vector<CreateGroupFunction>
-    System::getTrustGroups(const json& jsonObj)
+    System::getTrustGroups([[maybe_unused]] const json& jsonObj)
 {
 #ifdef MONITOR_USE_JSON
     return getTrustGrps(jsonObj);
@@ -245,7 +245,8 @@
     _trust = std::make_unique<trust::Manager>(groupFuncs);
 }
 
-const std::vector<FanDefinition> System::getFanDefinitions(const json& jsonObj)
+const std::vector<FanDefinition>
+    System::getFanDefinitions([[maybe_unused]] const json& jsonObj)
 {
 #ifdef MONITOR_USE_JSON
     return getFanDefs(jsonObj);
@@ -334,7 +335,7 @@
     }
 }
 
-void System::setFaultConfig(const json& jsonObj)
+void System::setFaultConfig([[maybe_unused]] const json& jsonObj)
 {
 #ifdef MONITOR_USE_JSON
     std::shared_ptr<PowerInterfaceBase> powerInterface =
diff --git a/monitor/tach_sensor.cpp b/monitor/tach_sensor.cpp
index 0ff1828..be56c69 100644
--- a/monitor/tach_sensor.cpp
+++ b/monitor/tach_sensor.cpp
@@ -70,11 +70,11 @@
     }
 }
 
-TachSensor::TachSensor(Mode mode, sdbusplus::bus::bus& bus, Fan& fan,
-                       const std::string& id, bool hasTarget, size_t funcDelay,
-                       const std::string& interface, double factor,
-                       int64_t offset, size_t method, size_t threshold,
-                       bool ignoreAboveMax, size_t timeout,
+TachSensor::TachSensor([[maybe_unused]] Mode mode, sdbusplus::bus::bus& bus,
+                       Fan& fan, const std::string& id, bool hasTarget,
+                       size_t funcDelay, const std::string& interface,
+                       double factor, int64_t offset, size_t method,
+                       size_t threshold, bool ignoreAboveMax, size_t timeout,
                        const std::optional<size_t>& errorDelay,
                        size_t countInterval, const sdeventplus::Event& event) :
     _bus(bus),