Over time, the contacts wear out and the switch must be replaced for the AC to function. When the clutch switch has failed, it will usually produce a few simple symptoms to look out for. 1. Lack of cooling. If you begin to notice that the AC system is not blowing as cold as it used to, then that may be a sign that the switch has failed, or is How an A/C Expansion Valve Works. Bad Car A/C Expansion Valve Symptoms. 1) Warm Air From Vents. 2) Frost on the Vents. 3) A/C Compressor Always On. 4) Inconsistent Airflow. 5) A/C System Failure. A/C Expansion Valve Replacement Cost. When I turn on the heat for both drivers side and passengers only the passengers side blows hot air. The driver's side blows cool air, the temperature is set at the highest it can go (84 degrees) and I'm positive the "snowflake" button isn't on, the direct vents buttons for both sides are also on. The iDrive climate menu shows all the red bars If the air from the vents in your car is cold on one side and warm on the other side when the A/C is ON, it is commonly caused by one of the following reasons: A malfunctioning blend door actuator or a mechanical problem with the blend door. There are several doors in the HVAC system of a car that control hot/cold airflow distribution through Forum posts have reported similar issues, one cause can be the AC being ON for a long time(e.g. a few hours during long drives) and ice is formed. BTW my old E39 had an AC issue in which no cold air came out. It was diagnosed as faulty final stage unit(blower resistor) and was fixed under warranty. ETMdl8. I have question on rear ac vent. Front vents are blowing out freezing cold air but rear vent is blowing warm air I took it to dealer and they said 3/4 series (435ix is my vehicle) doesn't have separate climate control in the back so it's pulling front ac air by the time it reaches back it would be warm and that's normal. 3 Answers. My 2007 Mazda 3 AC will stop blowing cold air while the cruise control is on. The green light will stay on but warm air comes out. If I turn the fan speed switch off then on, it will get cold again and sometimes blow cold air for a while before going warm again. The engine thermostat says the car is not getting warm. Tools Used: A/C Diagnostic Manifold Gauge Set, Fits R134A It is very inexpensive to replace a serpentine belt, fan belt, AC belt, or power steering belt whether it’s broken or loose. The replacement cost of a drive belt is only going to be between $100 and $200 in most cases. The belt itself will cost between $30 and $90 while the labor costs will probably be between $150 and $200. Answered in 5 minutes by: BMW Mechanic: George. George : This happens when the a/c system is low on freon. George : The system will need to be checked for the proper charge level and then checked for leaks. Customer: I just had the system recharged (a/c compressor was replaced last week).

bmw x5 ac not blowing cold air