diff --git a/config/example.cfg b/config/example.cfg
index 2bba823e..88f568e9 100644
--- a/config/example.cfg
+++ b/config/example.cfg
@@ -245,6 +245,13 @@ max_temp: 110
 pin: ar14
 #   PWM output pin controlling the fan. This parameter must be
 #   provided.
+#max_power: 1.0
+#   The maximum power (expressed as a value from 0.0 to 1.0) that the
+#   pin may be set to. The value 1.0 allows the pin to be set fully
+#   enabled for extended periods, while a value of 0.5 would allow the
+#   pin to be enabled for no more than half the time. This setting may
+#   be used to limit the total power output (over extended periods) to
+#   the fan. The default is 1.0.
 #hard_pwm: 0
 #   Set this value to force hardware PWM instead of software PWM. Set
 #   to 1 to force a hardware PWM at the fastest rate; set to a higher
diff --git a/klippy/fan.py b/klippy/fan.py
index bd66f7b5..54cace6c 100644
--- a/klippy/fan.py
+++ b/klippy/fan.py
@@ -11,21 +11,22 @@ class PrinterFan:
     def __init__(self, printer, config):
         self.last_fan_value = 0.
         self.last_fan_time = 0.
+        self.max_power = config.getfloat('max_power', 1., above=0., maxval=1.)
         self.kick_start_time = config.getfloat('kick_start_time', 0.1, minval=0.)
         pin = config.get('pin')
         hard_pwm = config.getint('hard_pwm', 0)
         self.mcu_fan = printer.mcu.create_pwm(pin, PWM_CYCLE_TIME, hard_pwm, 0.)
     # External commands
     def set_speed(self, print_time, value):
-        value = max(0., min(1., value))
+        value = max(0., min(self.max_power, value))
         if value == self.last_fan_value:
             return
         mcu_time = self.mcu_fan.print_to_mcu_time(print_time)
         mcu_time = max(self.last_fan_time + FAN_MIN_TIME, mcu_time)
-        if (value and value < 1.
+        if (value and value < self.max_power
             and not self.last_fan_value and self.kick_start_time):
             # Run fan at full speed for specified kick_start_time
-            self.mcu_fan.set_pwm(mcu_time, 1.)
+            self.mcu_fan.set_pwm(mcu_time, self.max_power)
             mcu_time += self.kick_start_time
         self.mcu_fan.set_pwm(mcu_time, value)
         self.last_fan_time = mcu_time