Why does my AC only work when driving forward?

If the clicking is coming from under the dashboard, the problem may be the temperature blend door. This door directs incoming air through either the AC evaporator or the heater core (or a blend) depending on the desired temperature.

Why does my car AC blow cold air?

If the fans aren’t running at high speed or one fan isn’t running, your AC may blow cold air when you’re moving because enough “ram” air is coming across the condenser coil to keep temperature and pressures low.

What to do when your a / C doesn’t work?

Warm the engine up, turn on the a/c until it malfunctions, and then spray a garden hose on the condenser with everything running. If A/C operation returns to normal, you’re not dumping enough heat off of the condenser. Inspect the condenser fan motor.

What to do when your car AC blows warm at idle?

GM and others use either a three-relay set up to run the two fans at low speed for normal driving and high speed when the AC is on or the low speed can adequately cool the radiator. Other carmakers use a solid-state speed relay that varies the speed of the fans based on engine cooling and AC needs.

Why does the AC blow cold air when the car is moving?

My car has an automatic transmission. When the car is moving, versus stopped, there is more air flow over the condenser (the heat exchanger in front of the radiator) and that airflow is essential to system operation. To maintain airflow when the car is in stop and go traffic, or is completely stopped, condenser fans will come on automatically.

What to do when your car AC is running?

Check the radiator fans to make sure at least one fan turns one when the AC is switched on. However, some cars operate both fans at low speed while driving and switch into high speed mode when the AC is running. So get tricked into thinking your fans are ok simply because they’re running.

Why does my car air conditioner not work?

Without air flow the condenser can’t do a heck of a lot. It could be a DIY fix if the DIYer knows anything about the system or if the problem is covered in the Haynes book. There are several possible problems. The first thing that needs to be checked is the pressure on the charge.

When is the best time to run air conditioning in a car?

Your car air conditioning works much better when you’re actually driving, because the faster the engine turns, the faster the A/C compressor runs, which lets the system cool more effectively. Don’t waste time and gas by letting your car run before you go.

Why does a car air conditioner work better when you are driving?

Your car air conditioning works much better when you’re actually driving, because the faster the engine turns, the faster the A/C compressor runs, which lets the system cool more effectively.

When to turn off the air conditioner in a new car?

If you’ve got a newer car that has an auto start/stop system, turn it off. This feature saves fuel, but it can also keep the car air conditioning compressor from running when it shuts the engine off.

When does air conditioning only work when driving forward?

Air Conditioning only works when driving forward?!? my air conditioning only works when I’m driving forward, and does not work at all any more when I’m sitting still at an idle. this is a new problem. the A/C has worked like a champ for the past year (since I started using this vehicle).

Why does my air conditioner get cold while driving?

One of the most common causes of the symptom you’re describing is when you have a bad or failing AC high pressure hose. The high pressure hose is designed to increase and decrease AC pressure during different driving conditions, since the AC drive belt will increase in speed as the vehicle accelerates.

When to turn on the AC in an RV?

Turn on the AC before starting your trip. It is beneficial to have your RV cooled down before heading out. This way, when you start to go, the air conditioner will work better. Park in the shade. Again, with the sun’s extreme influence on the temperature of your RV, it is important to stay away from it.

When does air conditioner cut out when going up hill?

Q: Air conditioner cuts out when accelerating or under pressure going up hill. I noticed today that whenever traveling and accelerating like going uphill for an extra length that my a/c will quit blowing and as soon as I level off or the need to accelerate levels off it will resume blowing. My car has 197000 miles.

When does the air conditioner come back on in a car?

The car’s AC system has a circut to cut off the AC compressor when the car is under hard acceleration. This is make sure you have power to pass or climb a hill then the AC comes back on when you let off the gas.

Why does my air conditioner cut out when I accelerate?

Typically this occurs due to a bad vacuum check valve under the hood. During hard acceleration the AC door system loses vacuum, causing the doors to default to the windshield. This check valve keeps this from occurring. It is located under the passenger side of the hood.

Navigation