ac only works when driving fast

It is easy to adjust but you have to waste your refrig charge when you open the system. My 2015 Nissan Altima starts off with hot air until I am constantly moving.

Ac Only Works When Driving What S Causing It

When driving heating works-ish.

. When running diagnostic on AC system it states that their is voltage to the compressor but the compressor does not turn on. 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. Joslomo and FLounder CAFROG Honda Minion VIP May 9 2011 3 Driving also cools down the condenser so it might be the condenser fan isnt turning on.

When the AC is running it cycles on and off by itself anyway. The purveyors of this myth explain that with the car going that fast the belt is turning at high speed. The group of 3 say start ac high and ac low.

I know I have Freon because my car gets cold ac blowing and my compressor is running normal. Swap the high and low relays. Ive tried putting it in neutral and revving the engine while waiting to move again but this does not seem to make a difference.

This as we say in the garage is bullfeathers. Get a thermometer that goes in your vent to see if its hot as you think it is or not from Amazon HERE. After a minute or so the low side will stabilize at the POA setting.

Changes the air outlet temperature by turning the ECO MODE switch on and off during heating and increases the amount of engine-off time when the ECO MODE switch is in the on state thus improving fuel economy. Up to 25 cash back As soon as you slow down the ac goes out. 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.

To maintain good airflow when the car is in stop and go traffic or is completely stopped condenser fans will come on automatically. As soon as you Radio and AC control module on 2007 s80 Volvo. And if you then switch on the AC it will be jolted into action at a very high speed and this will harm it.

Radio come on Radio and AC control module on 2007 s80 Volvo. The low relay is most likely bad. This part is about 8 delivered on ebay.

Mine was 32 psi stock setup for R12. May 9 2011 2 You nailed itac clutch on its way out. The fan is still blowing when I am at a stoplight or in a drive-thru it just blows hot air.

It may come back but only when you ac on auto only works when you drive fast. This door directs incoming air through either the AC evaporator or the heater core or a blend depending on the desired temperature. Up to 8 cash back 30 years of experience Hi there.

If the car is standing still on the parking lot heater blows cold air. One of the most common causes of the symptom youre describing is when you have a bad or failing AC high pressure hose. A malfunctioning vacuum-operated blend door will move in one direction when theres high vacuum idling and in the other direction at low vacuum driving which would result in exactly the situation you describe.

If i am revving the engine from 1000 to 2000 and back or accelerating the heater starts working. The car is heating only when i am accelerating. AC will not come on.

It looks normal nothing broken or weird about it. I am no expert in more recent vehicles but if the ac works only at higher driving speeds it could be because the ac condenser that is located in front of the vehicle near the radiator gets more air flow that helps it eliminate better the heat heat is extracted from the refrigerant when its compressed to be cooled down. Your ac fan condenser is might be broken ie problem with the spindle sometimes when the spindle is broken on travelling at high speeds the fan is pushed backwardsinwards and this restricts the motion of the fan and it might slow down or stop causing the compressor to heat and causing the ac to shut down.

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. 2015 Nissan Altima. 4 Heating Restriction Control.

Your AC works by compressing freon cooling it down since its gotten hot from being compressed through the heat exchanger in front of your car sent to an expansion tube or valve which causes it to cool down since decrease in pressure means a decrease in temperature and into another heat exchanger in your car. Now that summer is in full-swing I am at the end of my rope. Another possible cause is.

Once I stop at a red light or stuck in traffic it blows out hot air. Higher rpm causes the clutch to engage thus pumping refrigerant and delivering cool air. The ac works only when the car is accelerating.

Normally car AC systems are built so that the higher the engine speed RPM the faster the AC compressor turns. I tried to add the refrigerant but not even that will go into the low pressure valve. Up to 8 cash back When your car is moving say at 45 MPH there is lots of air flow over the condenser the condenser is the heat exchanger in front of the radiator and that airflow is essential to proper ac system operation.

However the drain is clogged and I could never find where to blow it out. To my knowledge the AC worked fine and had been working fine. I checked the water pump.

Radio come on but cant turn volume up or down. The ones for the AC are closest to the front of the car. AC Only Works at Highway Speeds UPMM019 MEMBER 2001 CHEVROLET SUBURBAN V8 4WD AUTOMATIC 212000 MILES So I have owned this 2001 Suburban since last October.

So more power applied to the engine means more power applied to the compressor which results in colder air. If you turn the ventilation fan down to a low speed you may find you get a small quantity of cold air. They will bull out like a plug straight up.

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Air Conditioner Only Works When Driving What Could Be Wrong

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