|  | @@ -3290,7 +3290,7 @@ static void gcode_PRUSA_SN()
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				|  |  |  //! May be that's why the bad RAMBo's still produce some fan RPM reading, but not corresponding to reality
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				|  |  |  static void gcode_PRUSA_BadRAMBoFanTest(){
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				|  |  |      //printf_P(PSTR("Enter fan pin test\n"));
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				|  |  | -#if !defined(DEBUG_DISABLE_FANCHECK) && defined(FANCHECK) && defined(TACH_1) && TACH_1 >-1
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				|  |  | +#if !defined(DEBUG_DISABLE_FANCHECK) && defined(FANCHECK) && defined(TACH_1) && TACH_1 >-1 && defined(IR_SENSOR)
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				|  |  |  	fan_measuring = false; // prevent EXTINT7 breaking into the measurement
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				|  |  |  	unsigned long tach1max = 0;
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				|  |  |  	uint8_t tach1cntr = 0;
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