diff --git a/Firmware/Marlin.h b/Firmware/Marlin.h
index 9eb6f07d..a93e6567 100755
--- a/Firmware/Marlin.h
+++ b/Firmware/Marlin.h
@@ -499,6 +499,7 @@ void raise_z_above(float target, bool plan=true);
 
 extern "C" void softReset();
 void stack_error();
+void pullup_error(bool fromTempISR);
 
 extern uint32_t IP_address;
 
diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 9d0f7591..077a93f6 100755
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -1758,6 +1758,10 @@ void stack_error() {
     crash_and_burn(dump_crash_reason::stack_error);
 }
 
+void pullup_error(bool fromTempISR) {
+    crash_and_burn(fromTempISR ? dump_crash_reason::bad_pullup_temp_isr : dump_crash_reason::bad_pullup_step_isr);
+}
+
 
 void trace();
 
diff --git a/Firmware/eeprom.h b/Firmware/eeprom.h
index 49701107..befd1e57 100644
--- a/Firmware/eeprom.h
+++ b/Firmware/eeprom.h
@@ -327,7 +327,13 @@ static_assert(sizeof(Sheets) == EEPROM_SHEETS_SIZEOF, "Sizeof(Sheets) is not EEP
 | 0x0D05 3333		| uint32_t	| EEPROM_JOB_ID							| ???			| 00 00 00 00h			| Job ID used by host software						| D3 only		| D3 Ax0d05 C4
 | 0x0D04 3332		| uint8_t	| EEPROM_ECOOL_ENABLE					| ffh 255		| ^						| Disable extruder motor scaling for non-farm print	| LCD menu		| D3 Ax0d04 C1
 | ^					| ^			| ^										| 2ah 42		| ^						| Enable extruder motor scaling for non-farm print	| ^				| D3 Ax0d04 C1
-| 0x0D03 3321		| uint8_t	| EEPROM_FW_CRASH_FLAG					| 01h 1			| ff/00					| Last FW crash reason (dump_crash_reason)			| D21/D22		| D3 Ax0d03 C1
+| 0x0D03 3321		| uint8_t	| EEPROM_FW_CRASH_FLAG					| ffh 255   	| ffh 255				| Last FW crash reason (dump_crash_reason)			| D21/D22		| D3 Ax0d03 C1
+| ^					| ^			| ^										| 00h 0			| ^						| manual											| ^				| ^
+| ^					| ^			| ^										| 01h 1			| ^						| stack_error										| ^				| ^
+| ^					| ^			| ^										| 02h 2			| ^						| watchdog											| ^				| ^
+| ^					| ^			| ^										| 03h 3			| ^						| bad_isr											| ^				| ^
+| ^					| ^			| ^										| 04h 4			| ^						| bad_pullup_temp_isr								| ^				| ^
+| ^					| ^			| ^										| 05h 5			| ^						| bad_pullup_step_isr								| ^				| ^
 
 | Address begin		| Bit/Type 	| Name 									| Valid values	| Default/FactoryReset	| Description 										| Gcode/Function| Debug code
 | :--:				| :--: 		| :--: 									| :--:			| :--:					| :--:												| :--:			| :--:
diff --git a/Firmware/stepper.cpp b/Firmware/stepper.cpp
index c9cb8beb..615e8cf7 100644
--- a/Firmware/stepper.cpp
+++ b/Firmware/stepper.cpp
@@ -299,6 +299,15 @@ ISR(TIMER1_COMPA_vect) {
 	if (sp < SP_min) SP_min = sp;
 #endif //DEBUG_STACK_MONITOR
 
+#ifdef DEBUG_PULLUP_CRASH
+    // check for faulty pull-ups enabled on thermistor inputs
+    if ((PORTF & (uint8_t)(ADC_DIDR_MSK & 0xff)) || (PORTK & (uint8_t)((ADC_DIDR_MSK >> 8) & 0xff)))
+        pullup_error(false);
+#else
+    PORTF &= ~(uint8_t)(ADC_DIDR_MSK & 0xff);
+    PORTK &= ~(uint8_t)((ADC_DIDR_MSK >> 8) & 0xff);
+#endif // DEBUG_PULLUP_CRASH
+
 #ifdef LIN_ADVANCE
     advance_isr_scheduler();
 #else
diff --git a/Firmware/temperature.cpp b/Firmware/temperature.cpp
index cf208a36..891f5560 100755
--- a/Firmware/temperature.cpp
+++ b/Firmware/temperature.cpp
@@ -1683,6 +1683,16 @@ void adc_ready(void) //callback from adc when sampling finished
 
 FORCE_INLINE static void temperature_isr()
 {
+#ifdef DEBUG_PULLUP_CRASH
+    // check for faulty pull-ups enabled on thermistor inputs
+    if ((PORTF & (uint8_t)(ADC_DIDR_MSK & 0xff)) || (PORTK & (uint8_t)((ADC_DIDR_MSK >> 8) & 0xff)))
+        pullup_error(true);
+#else
+    PORTF &= ~(uint8_t)(ADC_DIDR_MSK & 0xff);
+    PORTK &= ~(uint8_t)((ADC_DIDR_MSK >> 8) & 0xff);
+#endif // DEBUG_PULLUP_CRASH
+
+
 	if (!temp_meas_ready) adc_cycle();
 	lcd_buttons_update();
 
diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index 80eca1ad..a6f9f6c3 100755
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -1848,6 +1848,11 @@ static void lcd_stack_crash()
 }
 #endif
 
+#ifdef DEBUG_PULLUP_CRASH
+void TestPullupCrash() {
+	PORTF |= 0x01;
+}
+#endif // DEBUG_PULLUP_CRASH
 
 //! @brief Show Support Menu
 //!
@@ -2058,7 +2063,6 @@ static void lcd_support_menu()
 #endif /* DEBUG_BUILD */
 
   #endif //MK1BP
-
   MENU_END();
 }
 
@@ -8975,7 +8979,11 @@ void lcd_experimental_menu()
 #ifdef TMC2130
     MENU_ITEM_TOGGLE_P(_N("E-cool mode"), UserECoolEnabled()?_T(MSG_ON):_T(MSG_OFF), UserECool_toggle);////MSG_MENU_ECOOL c=18
 #endif
-
+    
+#ifdef DEBUG_PULLUP_CRASH
+    MENU_ITEM_FUNCTION_P(_N("Test Pullup Crash"), TestPullupCrash);
+#endif // DEBUG_PULLUP_CRASH
+    
 #ifdef PRUSA_SN_SUPPORT
     MENU_ITEM_FUNCTION_P(_N("Fake serial number"), WorkaroundPrusaSN);////MSG_WORKAROUND_PRUSA_SN c=18
 #endif //PRUSA_SN_SUPPORT
diff --git a/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
index aacb7cb7..063faea6 100644
--- a/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
@@ -168,6 +168,8 @@
 #define DEBUG_DCODE3
 #define DEBUG_DCODE6
 
+//#define DEBUG_PULLUP_CRASH //Test Pullup crash
+
 //#define DEBUG_BUILD
 //#define DEBUG_SEC_LANG   //secondary language debug output at startup
 //#define DEBUG_XFLASH   //debug external spi flash
diff --git a/Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h
index 8659c582..266606ff 100644
--- a/Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h
@@ -170,6 +170,8 @@
 #define DEBUG_DCODE3
 #define DEBUG_DCODE6
 
+//#define DEBUG_PULLUP_CRASH //Test Pullup crash
+
 //#define DEBUG_BUILD
 //#define DEBUG_SEC_LANG   //secondary language debug output at startup
 //#define DEBUG_XFLASH   //debug external spi flash
diff --git a/Firmware/xflash_dump.h b/Firmware/xflash_dump.h
index 6ece99c6..d68b3639 100644
--- a/Firmware/xflash_dump.h
+++ b/Firmware/xflash_dump.h
@@ -8,6 +8,8 @@ enum class dump_crash_reason : uint8_t
     stack_error,
     watchdog,
     bad_isr,
+    bad_pullup_temp_isr,
+    bad_pullup_step_isr,
 };
 
 #ifdef XFLASH_DUMP