diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index 59d80e0ea8..341aec59b4 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -1353,6 +1353,8 @@ void Temperature::manage_heater() {
       if (degRedundant() > TEMP_SENSOR_REDUNDANT_MAX_TC_TMAX - 1.0) max_temp_error(H_REDUNDANT);
       if (degRedundant() < TEMP_SENSOR_REDUNDANT_MAX_TC_TMIN + .01) min_temp_error(H_REDUNDANT);
     #endif
+  #else
+    #warning "Safety Alert! Disable IGNORE_THERMOCOUPLE_ERRORS for the final build!"
   #endif
 
   millis_t ms = millis();