diff --git a/phosphor-regulators/src/system.cpp b/phosphor-regulators/src/system.cpp
index 3cc2eb3..a36d1ee 100644
--- a/phosphor-regulators/src/system.cpp
+++ b/phosphor-regulators/src/system.cpp
@@ -43,6 +43,15 @@
     }
 }
 
+void System::clearErrorHistory()
+{
+    // Clear error history in each chassis
+    for (std::unique_ptr<Chassis>& oneChassis : chassis)
+    {
+        oneChassis->clearErrorHistory();
+    }
+}
+
 void System::closeDevices(Services& services)
 {
     // Close devices in each chassis
diff --git a/phosphor-regulators/src/system.hpp b/phosphor-regulators/src/system.hpp
index 715cb4b..16100c2 100644
--- a/phosphor-regulators/src/system.hpp
+++ b/phosphor-regulators/src/system.hpp
@@ -66,6 +66,16 @@
     void clearCache();
 
     /**
+     * Clears all error history.
+     *
+     * All data on previously logged errors will be deleted.  If errors occur
+     * again in the future they will be logged again.
+     *
+     * This method is normally called when the system is being powered on.
+     */
+    void clearErrorHistory();
+
+    /**
      * Close the regulator devices in the system.
      *
      * @param services system services like error logging and the journal
diff --git a/phosphor-regulators/test/system_tests.cpp b/phosphor-regulators/test/system_tests.cpp
index 31df5d6..441bbfe 100644
--- a/phosphor-regulators/test/system_tests.cpp
+++ b/phosphor-regulators/test/system_tests.cpp
@@ -20,6 +20,7 @@
 #include "i2c_interface.hpp"
 #include "id_map.hpp"
 #include "mock_action.hpp"
+#include "mock_error_logging.hpp"
 #include "mock_journal.hpp"
 #include "mock_sensors.hpp"
 #include "mock_services.hpp"
@@ -31,6 +32,7 @@
 #include "sensors.hpp"
 #include "services.hpp"
 #include "system.hpp"
+#include "test_sdbus_error.hpp"
 #include "test_utils.hpp"
 
 #include <memory>
@@ -47,6 +49,7 @@
 
 using ::testing::A;
 using ::testing::Return;
+using ::testing::Throw;
 using ::testing::TypedEq;
 
 static const std::string chassisInvPath{
@@ -118,6 +121,84 @@
     EXPECT_FALSE(presenceDetectionPtr->getCachedPresence().has_value());
 }
 
+TEST(SystemTests, ClearErrorHistory)
+{
+    // Create SensorMonitoring.  Will fail with a DBus exception.
+    std::unique_ptr<MockAction> action = std::make_unique<MockAction>();
+    EXPECT_CALL(*action, execute)
+        .WillRepeatedly(Throw(TestSDBusError{"Unable to set sensor value"}));
+    std::vector<std::unique_ptr<Action>> actions{};
+    actions.emplace_back(std::move(action));
+    std::unique_ptr<SensorMonitoring> sensorMonitoring =
+        std::make_unique<SensorMonitoring>(std::move(actions));
+
+    // Create Rail
+    std::unique_ptr<Configuration> configuration{};
+    std::unique_ptr<Rail> rail = std::make_unique<Rail>(
+        "vddr1", std::move(configuration), std::move(sensorMonitoring));
+
+    // Create Device that contains Rail
+    std::unique_ptr<i2c::MockedI2CInterface> i2cInterface =
+        std::make_unique<i2c::MockedI2CInterface>();
+    std::unique_ptr<PresenceDetection> presenceDetection{};
+    std::unique_ptr<Configuration> deviceConfiguration{};
+    std::vector<std::unique_ptr<Rail>> rails{};
+    rails.emplace_back(std::move(rail));
+    std::unique_ptr<Device> device = std::make_unique<Device>(
+        "reg1", true,
+        "/xyz/openbmc_project/inventory/system/chassis/motherboard/reg1",
+        std::move(i2cInterface), std::move(presenceDetection),
+        std::move(deviceConfiguration), std::move(rails));
+
+    // Create Chassis that contains Device
+    std::vector<std::unique_ptr<Device>> devices{};
+    devices.emplace_back(std::move(device));
+    std::unique_ptr<Chassis> chassis =
+        std::make_unique<Chassis>(1, chassisInvPath, std::move(devices));
+
+    // Create System that contains Chassis
+    std::vector<std::unique_ptr<Rule>> rules{};
+    std::vector<std::unique_ptr<Chassis>> chassisVec{};
+    chassisVec.emplace_back(std::move(chassis));
+    System system{std::move(rules), std::move(chassisVec)};
+
+    // Create mock services
+    MockServices services{};
+
+    // Expect Sensors service to be called 5+5=10 times
+    MockSensors& sensors = services.getMockSensors();
+    EXPECT_CALL(sensors, startRail).Times(10);
+    EXPECT_CALL(sensors, setValue).Times(0);
+    EXPECT_CALL(sensors, endRail).Times(10);
+
+    // Expect Journal service to be called 3+3=6 times to log error messages
+    MockJournal& journal = services.getMockJournal();
+    EXPECT_CALL(journal, logError(A<const std::vector<std::string>&>()))
+        .Times(6);
+    EXPECT_CALL(journal, logError(A<const std::string&>())).Times(6);
+
+    // Expect ErrorLogging service to be called 1+1=2 times to log a DBus error
+    MockErrorLogging& errorLogging = services.getMockErrorLogging();
+    EXPECT_CALL(errorLogging, logDBusError).Times(2);
+
+    // Monitor sensors 5 times.  Should fail every time, write to journal 3
+    // times, and log one error.
+    for (int i = 1; i <= 5; ++i)
+    {
+        system.monitorSensors(services);
+    }
+
+    // Clear error history
+    system.clearErrorHistory();
+
+    // Monitor sensors 5 times again.  Should fail every time, write to journal
+    // 3 times, and log one error.
+    for (int i = 1; i <= 5; ++i)
+    {
+        system.monitorSensors(services);
+    }
+}
+
 TEST(SystemTests, CloseDevices)
 {
     // Specify an empty rules vector