Revert "HeaterCheck is now only displayed one single time at startup"

This reverts commit 8aa79ade6a.

Marlin/src/lcd/anycubic_touchscreen.cpp

@@ -250,7 +250,6 @@ void AnycubicTouchscreenClass::Setup()
   #endif
 
   setup_OutageTestPin();
-  CheckHeaterError();
 }
 
 #if ENABLED(KNUTWURST_MEGA_P_LASER)
@@ -1288,6 +1287,9 @@ void AnycubicTouchscreenClass::CheckHeaterError()
 {
   if ((thermalManager.degHotend(0) < 5) || (thermalManager.degHotend(0) > 300))
   {
+    if (HeaterCheckCount > 60000)
+    {
+      HeaterCheckCount = 0;
       #ifndef ANYCUBIC_TFT_DEBUG
           HARDWARE_SERIAL_PROTOCOLPGM("J10"); // J10 Hotend temperature abnormal
           HARDWARE_SERIAL_ENTER();
@@ -1295,6 +1297,11 @@ void AnycubicTouchscreenClass::CheckHeaterError()
       #ifdef ANYCUBIC_TFT_DEBUG
             SERIAL_ECHOLNPGM("TFT Serial Debug: Hotend temperature abnormal... J20");
       #endif
+    } else {
+      HeaterCheckCount++;
+    }
+  } else {
+    HeaterCheckCount = 0;
   }
 }
 
@@ -2438,6 +2445,7 @@ SERIAL_PROTOCOLLN(cvalue);
 
 void AnycubicTouchscreenClass::CommandScan()
 {
+  CheckHeaterError();
   CheckSDCardChange();
   StateHandler();