diff --git a/klippy/extras/adc_temperature.py b/klippy/extras/adc_temperature.py
index 086f2858..10825901 100644
--- a/klippy/extras/adc_temperature.py
+++ b/klippy/extras/adc_temperature.py
@@ -191,7 +191,7 @@ def load_config(config):
     for sensor_type, params in [("AD595", AD595), ("PT100 INA826", PT100)]:
         func = (lambda config, params=params:
                 PrinterADCtoTemperature(config, LinearVoltage(config, params)))
-        pheater.add_sensor(sensor_type, func)
+        pheater.add_sensor_factory(sensor_type, func)
 
 def load_config_prefix(config):
     if config.get("resistance1", None) is None:
@@ -199,4 +199,4 @@ def load_config_prefix(config):
     else:
         custom_sensor = CustomLinearResistance(config)
     pheater = config.get_printer().lookup_object("heater")
-    pheater.add_sensor(custom_sensor.name, custom_sensor.create)
+    pheater.add_sensor_factory(custom_sensor.name, custom_sensor.create)
diff --git a/klippy/extras/spi_temperature.py b/klippy/extras/spi_temperature.py
index 6dbb0b94..ff4b10e4 100644
--- a/klippy/extras/spi_temperature.py
+++ b/klippy/extras/spi_temperature.py
@@ -342,4 +342,4 @@ def load_config(config):
     # Register sensors
     pheater = config.get_printer().lookup_object("heater")
     for name, klass in Sensors.items():
-        pheater.add_sensor(name, klass)
+        pheater.add_sensor_factory(name, klass)
diff --git a/klippy/extras/thermistor.py b/klippy/extras/thermistor.py
index 3dff1520..eee14b1c 100644
--- a/klippy/extras/thermistor.py
+++ b/klippy/extras/thermistor.py
@@ -117,9 +117,9 @@ def load_config(config):
     pheater = config.get_printer().lookup_object("heater")
     for sensor_type, params in Sensors.items():
         func = (lambda config, params=params: PrinterThermistor(config, params))
-        pheater.add_sensor(sensor_type, func)
+        pheater.add_sensor_factory(sensor_type, func)
 
 def load_config_prefix(config):
     thermistor = CustomThermistor(config)
     pheater = config.get_printer().lookup_object("heater")
-    pheater.add_sensor(thermistor.name, thermistor.create)
+    pheater.add_sensor_factory(thermistor.name, thermistor.create)
diff --git a/klippy/heater.py b/klippy/heater.py
index 7fb89563..7165582d 100644
--- a/klippy/heater.py
+++ b/klippy/heater.py
@@ -228,15 +228,15 @@ class ControlPID:
 class PrinterHeaters:
     def __init__(self, config):
         self.printer = config.get_printer()
-        self.sensors = {}
+        self.sensor_factories = {}
         self.heaters = {}
         self.heaters_gcode_id = {}
         # Register TURN_OFF_HEATERS command
         gcode = self.printer.lookup_object('gcode')
         gcode.register_command("TURN_OFF_HEATERS", self.cmd_TURN_OFF_HEATERS,
                                desc=self.cmd_TURN_OFF_HEATERS_help)
-    def add_sensor(self, sensor_type, sensor_factory):
-        self.sensors[sensor_type] = sensor_factory
+    def add_sensor_factory(self, sensor_type, sensor_factory):
+        self.sensor_factories[sensor_type] = sensor_factory
     def setup_heater(self, config, gcode_id):
         heater_name = config.get_name().split()[-1]
         if heater_name == 'extruder':
@@ -261,10 +261,10 @@ class PrinterHeaters:
         self.printer.try_load_module(config, "adc_temperature")
         self.printer.try_load_module(config, "spi_temperature")
         sensor_type = config.get('sensor_type')
-        if sensor_type not in self.sensors:
-            raise self.printer.config_error("Unknown temperature sensor '%s'" % (
-                sensor_type,))
-        return self.sensors[sensor_type](config)
+        if sensor_type not in self.sensor_factories:
+            raise self.printer.config_error(
+                "Unknown temperature sensor '%s'" % (sensor_type,))
+        return self.sensor_factories[sensor_type](config)
     def get_all_heaters(self):
         return self.heaters.values()
     cmd_TURN_OFF_HEATERS_help = "Turn off all heaters"