diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 70bbf0a0e6..3e23bb8944 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -303,9 +303,12 @@
   #define THERMAL_PROTECTION_PERIOD 40        // Seconds
   #define THERMAL_PROTECTION_HYSTERESIS 4     // Degrees Celsius
 
-  //#define ADAPTIVE_FAN_SLOWING              // Slow part cooling fan if temperature drops
-  #if ENABLED(ADAPTIVE_FAN_SLOWING) && EITHER(MPCTEMP, PIDTEMP)
-    //#define TEMP_TUNING_MAINTAIN_FAN        // Don't slow fan speed during M303 or M306 T
+  //#define ADAPTIVE_FAN_SLOWING              // Slow down the part-cooling fan if the temperature drops
+  #if ENABLED(ADAPTIVE_FAN_SLOWING)
+    //#define REPORT_ADAPTIVE_FAN_SLOWING     // Report fan slowing activity to the console
+    #if EITHER(MPCTEMP, PIDTEMP)
+      //#define TEMP_TUNING_MAINTAIN_FAN      // Don't slow down the fan speed during M303 or M306 T
+    #endif
   #endif
 
   /**
diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index cc89d71e50..ba2563ccdc 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -2976,6 +2976,12 @@ void Temperature::init() {
             else
               scale = 0;
 
+            if (TERN0(REPORT_ADAPTIVE_FAN_SLOWING, DEBUGGING(INFO))) {
+              const uint8_t fss7 = fan_speed_scaler[fan_index] & 0x80;
+              if (fss7 ^ (scale & 0x80))
+                serial_ternary(fss7, F("Adaptive Fan Slowing "), nullptr, F("de"), F("activated.\n"));
+            }
+
             fan_speed_scaler[fan_index] = scale;
           }
         #endif // ADAPTIVE_FAN_SLOWING
diff --git a/buildroot/tests/LPC1769 b/buildroot/tests/LPC1769
index b3348c6d65..cf2838bdd5 100755
--- a/buildroot/tests/LPC1769
+++ b/buildroot/tests/LPC1769
@@ -18,7 +18,7 @@ opt_set MOTHERBOARD BOARD_SMOOTHIEBOARD \
         GRID_MAX_POINTS_X 16 \
         NOZZLE_CLEAN_START_POINT "{ {  10, 10, 3 }, {  10, 10, 3 } }" \
         NOZZLE_CLEAN_END_POINT "{ {  10, 20, 3 }, {  10, 20, 3 } }"
-opt_enable TFTGLCD_PANEL_SPI SDSUPPORT ADAPTIVE_FAN_SLOWING TEMP_TUNING_MAINTAIN_FAN \
+opt_enable TFTGLCD_PANEL_SPI SDSUPPORT ADAPTIVE_FAN_SLOWING REPORT_ADAPTIVE_FAN_SLOWING TEMP_TUNING_MAINTAIN_FAN \
            MAX31865_SENSOR_OHMS_0 MAX31865_CALIBRATION_OHMS_0 \
            MAG_MOUNTED_PROBE AUTO_BED_LEVELING_BILINEAR G29_RETRY_AND_RECOVER Z_MIN_PROBE_REPEATABILITY_TEST DEBUG_LEVELING_FEATURE \
            BABYSTEPPING BABYSTEP_XY BABYSTEP_ZPROBE_OFFSET BED_TRAMMING_USE_PROBE BED_TRAMMING_VERIFY_RAISED \