diff --git a/source/Core/Threads/OperatingModes/utils/checkUndervoltage.cpp b/source/Core/Threads/OperatingModes/utils/checkUndervoltage.cpp
new file mode 100644
index 00000000..b95359f6
--- /dev/null
+++ b/source/Core/Threads/OperatingModes/utils/checkUndervoltage.cpp
@@ -0,0 +1,35 @@
+
+#ifdef POW_DC
+// returns true if undervoltage has occured
+bool checkForUnderVoltage(void) {
+  if (!getIsPoweredByDCIN()) {
+    return false;
+  }
+  uint16_t v = getInputVoltageX10(getSettingValue(SettingsOptions::VoltageDiv), 0);
+
+  // Dont check for first 2 seconds while the ADC stabilizes and the DMA fills
+  // the buffer
+  if (xTaskGetTickCount() > (TICKS_SECOND * 2)) {
+    if ((v < lookupVoltageLevel())) {
+      currentTempTargetDegC = 0;
+      OLED::clearScreen();
+      OLED::setCursor(0, 0);
+      if (getSettingValue(SettingsOptions::DetailedSoldering)) {
+        OLED::print(translatedString(Tr->UndervoltageString), FontStyle::SMALL);
+        OLED::setCursor(0, 8);
+        OLED::print(translatedString(Tr->InputVoltageString), FontStyle::SMALL);
+        printVoltage();
+        OLED::print(SymbolVolts, FontStyle::SMALL);
+      } else {
+        OLED::print(translatedString(Tr->UVLOWarningString), FontStyle::LARGE);
+      }
+
+      OLED::refresh();
+      GUIDelay();
+      waitForButtonPress();
+      return true;
+    }
+  }
+  return false;
+}
+#endif
\ No newline at end of file