ac only works when driving slow

Most likely it would be due to AC condenser fan malfunctioning. Basically the AC high pressure hose is kind of like a turbo for your AC - it supplies more pressure when youre idling and less pressure when the AC motor is.

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. The fan is still blowing when I am at a stoplight or in a drive-thru it just blows hot air. And noticed that the second fan on the radiator never came on although i. You may have a fan malfunctioning.

Faulty AC Accumulator Filter Drier. When I drive the car and get it moving 30 mph or so the high side reading drops to under 100 psi along with the loss of cool air. Air condition systems only need around 6 lb of pressure to operate.

When you are moving the air is flowing through the condenser coils which is what cools the air. Tuesday July 1st 2014 AT 742 AM. As soon as you Radio and AC control module on 2007 s80 Volvo.

AC Blows Cold Air Only When Driving 30 MPH or Faster. Rev the engine with the car stopped the high side stays at 300 psi. Either the fan on the front isnt coming on when AC engaged or another reason could be its overcharged with R134 so when Ac is on the compressor is srtaining but you would notice engine slow down when AC engaged if this was the case If both first causes seem to be ok then take bottom hose off and flush cooling system using a heater hose connection and reverse the flow.

The high and low side gauge readings are normal around 30035 psi. Plus tax and some other 3 BS. As soon as you get moving it gets cold again.

Your AC Is Leaking Refrigerant. The ac needs air constantly flowing across the condenser-this is the thing in front of your radiator that looks like a radiator. The AC blows hard all the time but when you are sitting at idle at a redlight or something it goes from cold to lukewarm.

As soon as you slow down the ac goes out. 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. The fast mode is when both fans are running and you can actially hear them running from outside of the car.

If the AC is off the compressor is sort of free-wheeling and doesnt load up the engine. Super nice super clean. Sounds like either youre low on freon or your condenser fans are not kicking on.

Full larimie heated leather infinity sound system. Theres also loud hiss that comes from somewhere inside the. Radio come on Radio and AC control module on 2007 s80 Volvo.

The AC Condenser Is BlockedBroken. 36 to use the AC gauges. But unlike your fridge which is powered from the mains electricity the compressor under your bonnet is driven by a belt from your engine.

VOLVO-V70 March 30 2019 128am 11. Having a non-working AC in the middle of the. Radio come on but cant turn volume up or.

99 of the time this problem is caused by insufficient air flow into the engine bay while vehicle is in slow moving traffic or at stop with engine and ac on. When your going down the road airflow is no problem. The fans have two modes a slow and fast one.

My one issue is the AC doesnt work when the truck is idling. -listen to hear if your radiator fans are running. Faulty AC Cooling Fans.

When you stop or slow down the airflow depends more on the fan which is either electric or mechanical. Up to 8 cash back 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. The AC on my 2008 20 L turbo now only works when I am driving at speeds of at least 30 MPH.

If that is so and if you have only one electric fan both for condenser and radiator of engine in your car then you can just full rev the engine for 510 min while keeping the car stationary and check if the fan sta. When Im idling with AC on I can hear the AC compressor kicking on for under 3. So 17500 later the shop says it was the fan clutch.

And once I go under 100kmph it starts cooling again. -set climate to auto and temp to Lo. Feel like I was robbed to some degree.

Driving down the road it works and gets nice and cold. The ac cools just fine under 100kmph. But when I go over 100kmph or accelerate above 3000rpm it stops cooling.

Ive tried putting it in neutral and revving the engine while waiting to move again but this does not seem to make a difference. I popped the hood and noticed that when the AC compressor kicks on that it almost stalls the engine. Up to 25 cash back Ac on auto only works when you drive fast.

Now that summer is in full-swing I am at the end of my rope. Many cars are equipped with two radiator fans while others have one. Ian you are 8 years too late and I would hope they have fixed the problem or replaced the vehicle.

Anytime the AC is on the fans should be running. 99 for a fan clutch. If your HVAC works the same as an 04 try this.

Odds are good that the fan switch may be at fault but a more likely reason is that a blower motor resistor that controls the voltage going. -key to ON position engine off. If your car AC blows cold air when driving at highway speeds but turns warm at stop lights or when driving at slow speeds you may have a bad radiator fan or radiator fan relay.

The ac works only when the car is accelerating. As soon as you turn it ON the compressor begins to work and it acts as a load on the engine. Answer 1 of 4.

So I just bought this new to me 03 Ram 2500HD 57L Hemi. If thats not the issue then your coils on your condenser is stopped up not allowing it to cool the air. It may come back but only when you ac on auto only works when you drive fast.

It could be but there is a much more likely culprit. Bring the car to a stop the high side goes up to 300 psi. Faulty Car AC Compressor.

For the AC to work there has to be a change of state from gas to a liquid in the condenser in front of the radiator To get this change of state there has to be air flow across the condenser. No air flow no change of state no or little cooling.

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