ac only works when driving slow

When your vehicle is at idles the RPMs are usually low around 700800. Up to 8 cash back Recommended Services.

4 Reasons The Ac Only Works When Driving And Stops While Parked Obd Advisor

AC condenser blockage.

. A loss of up to 15 of the refrigerant per year is normal due to the design. Another cause is that the AC compressor is not working properly. If the compressor is not engaging or if it is not pumping enough refrigerant this could also cause the AC only to blow cold when driving.

It is easy to adjust but you have to waste your refrig charge when you open the system. Read customer reviews find best sellers. The ACs cooling capacity has two limiting factors when it idles low RPMs and reduced airflow.

This part is responsible for transferring the heat coming from the system and dispelling it into the atmosphere. Insufficient amount of refrigerant is still the main cause of a non-functioning AC system. Financing Available with Easy Terms and No Money Down.

When you are traveling above 55 mph enough air may be blowing over the condenser to disperse the heat. 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. My AC works till I stop and then blows hot.

The air conditioning compressor will turn off at the slightest rise of heat due to excessive HEAD PRESSURE - however the engine will not show any signs of overheating. If the coolant level is low or there is a leak in the system this could cause the AC only to blow cold when the car is moving. To my knowledge the AC worked fine and had been working fine.

The freon level is good and. As soon as you slow down the ac goes out. After a minute or so the low side will stabilize at the POA setting.

The only time it will turn off when the AC button is depressed and blower fan is on is if the low side pressure drops too low or the high side pressure goes too high. It needs to reduce the temperature so the refrigerant can condense properly. Browse discover thousands of brands.

There can be two possible reasons why your AC is only blowing cold air at high speeds. For the AC system to work properly it needs this pressure and a specific amount of. Among the many problems that cause the air conditioner not to work when stopping the car 5 issues are most likely to appear and worse all of them are not concentrated in one but dispersed in different locations.

I bought one of the DIY Freon recharge kits. To put that into perspective the tachometer generally maintains 20002800 RPM when the vehicle is. The airflow from driving helps keep the fan working so when your car stops so do the fan and your AC.

Another cause is that the AC compressor is not working properly. Faulty Condenser Fan The most likely culprit is the condenser fan. Hooked it up the the low side port.

When running diagnostic on AC system it states that their is voltage to the compressor but the compressor does not turn on. It is easy enough to check to see if the fans are working or not. If the fan isnt pulling enough air through the condenser at lower speeds the air conditioning may not work.

Some of these components may fail which could be the reason why your cars AC only works when driving. Here are the possible causes. AC only works when driving - YouTube.

The condenser fan is responsible for dissipating heat from the condenser similar to how the radiator fans work. No payments for 60 days. One is that your condenser fan s is either not working or is worn out to the point that it cant spin sufficiently fast to bring enough air through the condenser.

When Im idling with AC on I can hear the AC compressor kicking on for under 3 seconds. Otherwise the clutch will stay engaged all the time but the compressor itself will displace more gas when the system is first turned on. It may come back but only when you drive fast.

As well when your car is stopped no air is flowing through any unblocked parts of your condenserso no cool air is passing through the cabin. To maintain airflow when the car is in stop and go traffic or is completely stopped condenser fans will come on automatically. You should also note that these failures can occur both alternately and at the same time.

If this is the case the only option is to replace the broken part. If your condenser has a blockage youll need to clean it out. However when you say that it clicks on this almost sounds as if the system is losing its Freon charge.

Ad Enjoy low prices on earths biggest selection of books electronics home apparel more. Ad We Offer High Efficiency AC Systems to Meet Your Needs Budget. If the AC in a car only works when driving it could be due to a problem with the condenser fan.

Then it kicks off for about 2 second. The quick way to check the POA setting is to run the AC at idle unplug the blower fan and look at the low side pressure. Does this indefinitely making the truck sound like its idling funny.

Since the AC is not working but when I am at highway speeds and have it on after about 10 Minutes the dash makes the suction sound and then the AC work and she blows cold. In this way it can be determined whether the loss of refrigerant is due to a defective condenser. Up to 15 cash back ac on auto only works when you drive fast.

However the drain is clogged and I could never find where to blow it out. Mine was 32 psi stock setup for R12. Driving down the road it works and gets nice and cold.

How to fix it.

Air Conditioner Only Works When Driving What Could Be Wrong