diff --git a/klippy/heater.py b/klippy/heater.py
index 11f88107..9dd48b19 100644
--- a/klippy/heater.py
+++ b/klippy/heater.py
@@ -113,8 +113,6 @@ class PrinterHeater:
         self.min_extrude_temp = config.getfloat(
             'min_extrude_temp', 170., minval=self.min_temp, maxval=self.max_temp)
         self.max_power = config.getfloat('max_power', 1., above=0., maxval=1.)
-        is_fileoutput = printer.get_start_args().get('debugoutput') is not None
-        self.can_extrude = self.min_extrude_temp <= 0. or is_fileoutput
         self.lock = threading.Lock()
         self.last_temp = 0.
         self.last_temp_time = 0.
@@ -134,6 +132,8 @@ class PrinterHeater:
         self.mcu_adc.setup_minmax(SAMPLE_TIME, SAMPLE_COUNT,
                                   minval=min(adc_range), maxval=max(adc_range))
         self.mcu_adc.setup_adc_callback(REPORT_TIME, self.adc_callback)
+        is_fileoutput = self.mcu_adc.get_mcu().is_fileoutput()
+        self.can_extrude = self.min_extrude_temp <= 0. or is_fileoutput
         self.control = algo(self, config)
         # pwm caching
         self.next_pwm_time = 0.
diff --git a/klippy/stepper.py b/klippy/stepper.py
index a5477aa8..ffafb395 100644
--- a/klippy/stepper.py
+++ b/klippy/stepper.py
@@ -95,7 +95,7 @@ class PrinterHomingStepper(PrinterStepper):
                 logging.info("Endstop for %s is not accurate enough for stepper"
                              " phase adjustment" % (name,))
                 self.homing_stepper_phases = None
-            if printer.get_start_args().get('debugoutput') is not None:
+            if self.mcu_endstop.get_mcu().is_fileoutput():
                 self.homing_endstop_accuracy = self.homing_stepper_phases
     def enable_endstop_checking(self, move_time, step_time):
         mcu_time = self.mcu_endstop.get_mcu().print_to_mcu_time(move_time)
diff --git a/klippy/toolhead.py b/klippy/toolhead.py
index c567213c..95ee2b3d 100644
--- a/klippy/toolhead.py
+++ b/klippy/toolhead.py
@@ -356,7 +356,7 @@ class ToolHead:
         logging.debug('; Max time of %f' % (last_move_time,))
     def wait_moves(self):
         self._flush_lookahead()
-        if self.printer.get_start_args().get('debugoutput') is not None:
+        if self.mcu.is_fileoutput():
             return
         eventtime = self.reactor.monotonic()
         while self.print_time: