diff --git a/pyfan.py b/pyfan.py
index 577d32b..a9b42d0 100644
--- a/pyfan.py
+++ b/pyfan.py
@@ -26,15 +26,31 @@ class ThermalZone:
             config["interval"] = 3
             logging.getLogger("pyfan").warning(
                 "[%s] No interval specified, using default. This is deprecated since 1.6 and may be removed in future "
-                "versions. See example config for reference.", self.name)
+                "versions. See example config for reference.",
+                self.name,
+            )
 
-        self.pid = PID(config["pid"]["p"], config["pid"]["i"], config["pid"]["d"], setpoint=0,
-                       sample_time=config["interval"])
-        self.pid.output_limits = (0, 255)
+        self.pid = PID(
+            config["pid"]["p"],
+            config["pid"]["i"],
+            config["pid"]["d"],
+            setpoint=0,
+            sample_time=config["interval"],
+        )
+
+        # we prefer 3 for pwm_enable, but since some chips do not support this mode, use 1 with pwm_min of 1 as fallback
+        # more on pwm=0 behaviour: https://www.kernel.org/doc/html/latest/hwmon/pwm-fan.html
+        self.pid.output_limits = (1, 255)
         self.setup_pwm()
 
-        logging.getLogger("pyfan").info("[%s] Source=%s Fans=%s Factor=%f %s", self.name, self.temp_source,
-                                        self.fans, self.factor, self.pid)
+        logging.getLogger("pyfan").info(
+            "[%s] Source=%s Fans=%s Factor=%f %s",
+            self.name,
+            self.temp_source,
+            self.fans,
+            self.factor,
+            self.pid,
+        )
 
     def eval(self):
         if self.get_temp():
@@ -50,24 +66,46 @@ class ThermalZone:
                         if isinstance(fan_val, list):
                             if len(fan_val) < 2:
                                 logging.getLogger("pyfan").warning(
-                                    "[%s] max/min for %s was not set correctly (%s)", self.name, fan, fan_val)
+                                    "[%s] max/min for %s was not set correctly (%s)",
+                                    self.name,
+                                    fan,
+                                    fan_val,
+                                )
 
-                            if self.read_sysfs(fan) != min(fan_val[1], max(val, fan_val[0])):
-                                self.write_sysfs(fan, min(fan_val[1], max(val, fan_val[0])))
+                            if self.read_sysfs(fan) != min(
+                                fan_val[1], max(val, fan_val[0])
+                            ):
+                                self.write_sysfs(
+                                    fan, min(fan_val[1], max(val, fan_val[0]))
+                                )
                         elif self.read_sysfs(fan) != min(val, fan_val):
                             self.write_sysfs(fan, min(val, fan_val))
 
-                        logging.getLogger("pyfan").debug("[%s] %s=%i%%", self.name, fan,
-                                                         int(int(self.read_sysfs(fan)) / 255 * 100))
+                        logging.getLogger("pyfan").debug(
+                            "[%s] %s=%i%%",
+                            self.name,
+                            fan,
+                            int(int(self.read_sysfs(fan)) / 255 * 100),
+                        )
                     elif self.read_sysfs(target_fan) != val:
                         self.write_sysfs(target_fan, val)
             except OSError as err:
-                logging.getLogger("pyfan").warning("[%s] Failed to set pwm, trying to reset it. (%s)", self.name,
-                                                   err.strerror)
+                logging.getLogger("pyfan").warning(
+                    "[%s] Failed to set pwm, trying to reset it. (%s)",
+                    self.name,
+                    err.strerror,
+                )
+
                 self.setup_pwm(1)
 
-            logging.getLogger("pyfan").debug("[%s] %i%% D:%iC T:%iC %s", self.name, int(val / 255 * 100), diff,
-                                             self.get_temp(), self.pid)
+            logging.getLogger("pyfan").debug(
+                "[%s] %i%% D:%iC T:%iC %s",
+                self.name,
+                int(val / 255 * 100),
+                diff,
+                self.get_temp(),
+                self.pid,
+            )
 
     def get_temp(self):
         if isinstance(self.temp_source, list):
@@ -94,7 +132,9 @@ class ThermalZone:
                 else:
                     self.set_pwm_mode(target_fan, value)
             except FileNotFoundError:
-                logging.getLogger("pyfan").warning("[%s] pwm not found. Try reloading hwmon map...", self.name)
+                logging.getLogger("pyfan").warning(
+                    "[%s] pwm not found. Try reloading hwmon map...", self.name
+                )
                 self.hwmap = self.pyfan.hwmap
 
     def replace_alias(self, path):
@@ -114,8 +154,11 @@ class ThermalZone:
             with open(self.build_pwm_path(path)) as sysfs_f:
                 return sysfs_f.readline()
         except FileNotFoundError as err:
-            logging.getLogger("pyfan").warning("[%s] temp source not found. Not ready yet or wrong path? (%s)",
-                                               self.name, err.strerror)
+            logging.getLogger("pyfan").warning(
+                "[%s] temp source not found. Not ready yet or wrong path? (%s)",
+                self.name,
+                err.strerror,
+            )
             return None
 
     def set_pwm_mode(self, path, value=1):
@@ -131,7 +174,8 @@ class PyFan:
             self.interval = 0.2
             logging.getLogger("pyfan").warning(
                 "No pid_interval specified, using default. This is deprecated since 1.6 and may be removed in future "
-                "versions. See example config for reference.")
+                "versions. See example config for reference."
+            )
         else:
             self.interval = self.config["pid_interval"]
 
@@ -139,7 +183,8 @@ class PyFan:
             self.zones.append(ThermalZone(zone, self))
 
         logging.getLogger("pyfan").info(
-            "Created %d thermal zones, pid_interval=%f.", len(self.zones), self.interval)
+            "Created %d thermal zones, pid_interval=%f.", len(self.zones), self.interval
+        )
 
     def __enter__(self):
         return self