Why does my AC only work when driving?

Why does my AC only work when driving?

This is because it is not able to regulate the refrigerant needed to cool down the air. You may notice the car being most affected when stopped, as the engine is not working as hard, and there is no airflow from driving down the highway.

Why does my AC not cool when idling?

The condenser is primarily responsible for ensuring cool air from the AC vents. If the condenser has gone bad, it will not be able to process the freon and produce cool air. A broken condenser might malfunction when there is a cut back in power as when the car is idling or running the AC purely on the battery.

Why does my AC only work on low?

When a blower resistor fails, the highest fan speed usually is the only one that still works because it essentially bypasses the resistor and receives the maximum amount of voltage. When the resistor is working, it reduces the amount of voltage going to the lower fan speeds, so the fan runs slower.

How much does it cost to fix an AC condenser in a car?

Car A/C condenser replacement cost about $679 with average auto AC condenser replacement prices ranging from $585 to $773 in the US for 2020 according to RepairPal.com.

Why is my car AC not cold enough?

There can be a variety of problems with your car that led to poor cold air circulation from your A/C. Check out some of the common problems that mechanics face every year: Your A/C only cools while driving: If your car is not cold enough while idling, the fan just needs to be replaced. In most cases, your A/C is fine.

What should temperature be for car AC to blow cold air?

Once the refrigerant is filled, head inside the car and with the thermometer placed inside one of the AC vents, note the temperature. An ideal AC should blow cold air which is about 28 degrees.

Why does my AC blow warm air at 30 mph?

VW suggests replace compressor, expansion valve, drier and condensor at cost of $2,225 but made no guarantee that problem will be fixed. VW technicians with whom I spoke do not know why the system works while driving at 30 MPH or faster yet blows warm air at slower speeds.

When does the air conditioner need to be running?

Both fans should be running even if the car air-conditioning is turned on during a hot summer day. Just a small note to remember, whenever the car is moving at freeway speeds, Freon is pumped throughout the air conditioning system more easily by the compressor compared to when the car is sitting idle.