diff --git a/platform/mellanox/mlnx-platform-api/sonic_platform/fan.py b/platform/mellanox/mlnx-platform-api/sonic_platform/fan.py
index 9567c65ce6c8..40dadb0f4000 100644
--- a/platform/mellanox/mlnx-platform-api/sonic_platform/fan.py
+++ b/platform/mellanox/mlnx-platform-api/sonic_platform/fan.py
@@ -216,7 +216,10 @@ def get_target_speed(self):
         """
         try:
             # Get PSU fan target speed according to current system cooling level
-            cooling_level = utils.read_int_from_file('/run/hw-management/thermal/cooling_cur_state', log_func=None)
+            pwm = utils.read_int_from_file('/run/hw-management/thermal/pwm1', log_func=None)
+            if pwm >= PWM_MAX:
+                pwm = PWM_MAX - 1
+            cooling_level = int(pwm / PWM_MAX * 10)
             return int(self.PSU_FAN_SPEED[cooling_level], 16)
         except Exception:
             return self.get_speed()
diff --git a/platform/mellanox/mlnx-platform-api/sonic_platform/thermal.py b/platform/mellanox/mlnx-platform-api/sonic_platform/thermal.py
index 235086ca5db4..1a6b45da63ac 100644
--- a/platform/mellanox/mlnx-platform-api/sonic_platform/thermal.py
+++ b/platform/mellanox/mlnx-platform-api/sonic_platform/thermal.py
@@ -73,8 +73,8 @@
         {
             "name": "ASIC",
             "temperature": "asic",
-            "high_threshold": "mlxsw/temp_trip_hot",
-            "high_critical_threshold": "mlxsw/temp_trip_crit"
+            "high_threshold": "asic_temp_emergency",
+            "high_critical_threshold": "asic_temp_trip_crit"
         },
         {
             "name": "Ambient Port Side Temp",
@@ -105,8 +105,8 @@
         {
             "name": "Gearbox {} Temp",
             "temperature": "gearbox{}_temp_input",
-            "high_threshold": "mlxsw-gearbox{}/temp_trip_hot",
-            "high_critical_threshold": "mlxsw-gearbox{}/temp_trip_crit",
+            "high_threshold": "gearbox{}_temp_emergency",
+            "high_critical_threshold": "gearbox{}_temp_trip_crit",
             "type": "indexable"
         },
         {
@@ -135,8 +135,8 @@
     'linecard thermals': {
         "name": "Gearbox {} Temp",
         "temperature": "gearbox{}_temp_input",
-        "high_threshold": "mlxsw-gearbox{}/temp_trip_hot",
-        "high_critical_threshold": "mlxsw-gearbox{}/temp_trip_crit",
+        "high_threshold": "gearbox{}_temp_emergency",
+        "high_critical_threshold": "gearbox{}_temp_trip_crit",
         "type": "indexable"
     }
 }
@@ -268,16 +268,6 @@ def _check_thermal_sysfs_existence(file_path):
 
 
 class Thermal(ThermalBase):
-    thermal_algorithm_status = False
-    # Expect cooling level, used for caching the cooling level value before commiting to hardware
-    expect_cooling_level = None
-    # Expect cooling state
-    expect_cooling_state = None
-    # Last committed cooling level
-    last_set_cooling_level = None
-    last_set_cooling_state = None
-    last_set_psu_cooling_level = None
-
     def __init__(self, name, temp_file, high_th_file, high_crit_th_file, position):
         """
         index should be a string for category ambient and int for other categories
diff --git a/platform/mellanox/mlnx-platform-api/tests/conftest.py b/platform/mellanox/mlnx-platform-api/tests/conftest.py
index b69fdd6c75f0..56888c6512cf 100644
--- a/platform/mellanox/mlnx-platform-api/tests/conftest.py
+++ b/platform/mellanox/mlnx-platform-api/tests/conftest.py
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2021-2022 NVIDIA CORPORATION & AFFILIATES.
+# Copyright (c) 2021-2023 NVIDIA CORPORATION & AFFILIATES.
 # Apache-2.0
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -42,14 +42,3 @@ def auto_recover_mock():
     utils.read_str_from_file = origin_read_str_from_file
     utils.write_file = origin_write_file
     utils.read_float_from_file = origin_read_float_from_file
-
-
-@pytest.fixture(scope='function', autouse=True)
-def auto_reset_cooling_level():
-    from sonic_platform.thermal import Thermal
-    yield
-    Thermal.expect_cooling_level = None
-    Thermal.expect_cooling_state = None
-    Thermal.last_set_cooling_level = None
-    Thermal.last_set_cooling_state = None
-    Thermal.last_set_psu_cooling_level = None
diff --git a/platform/mellanox/mlnx-platform-api/tests/test_fan_api.py b/platform/mellanox/mlnx-platform-api/tests/test_fan_api.py
index 151b197e0836..bb643f211e0a 100644
--- a/platform/mellanox/mlnx-platform-api/tests/test_fan_api.py
+++ b/platform/mellanox/mlnx-platform-api/tests/test_fan_api.py
@@ -124,8 +124,8 @@ def test_psu_fan_basic(self, mock_path_exists, mock_powergood, mock_presence, mo
         assert fan.get_presence() is False
         mock_path_exists.return_value = True
         assert fan.get_presence() is True
-        mock_read_int.return_value = 7
-        assert fan.get_target_speed() == 70
+        mock_read_int.return_value = int(255 / 10 * 7)
+        assert fan.get_target_speed() == 60
         mock_read_int.return_value = FAN_DIR_VALUE_INTAKE
         assert fan.get_direction() == Fan.FAN_DIRECTION_INTAKE
         mock_read_int.return_value = FAN_DIR_VALUE_EXHAUST