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Should engine be running when charging AC?

Should engine be running when charging AC?

With the AC still running, thread the refrigerant can to the port on the service hose. Let the engine run and the compressor turn. Press the trigger on the refrigerant can for 10 to 20 seconds and let the gas go into the system. Keep monitoring the pressure to make sure you do not overcharge the system.

How do I know if I overcharged my car AC?

Signs and Symptoms of Overcharged Car AC

  1. Faulty Cooling. One of the most evident signs of an overcharged AC is faulty cooling.
  2. Noisy or Broken Compressor. The AC works in a cycle transforming compressed liquid coolant into a gas then back to its liquid state.
  3. High Pressure.
  4. Failing Engine.

What side do you charge AC on?

Every auto air conditioning system has two service ports: one on the high pressure and one on the low pressure side. When recharging with AC Avalanche refrigerant, for safety, you will charge through the low side service port. Never charge through the high side port.

Does freon go in high or low?

The freon is added on the LOW PRESSURE SIDE ONLY. The hose tool you bought is made so you can only hook to the low side as the high side and low side fittings are different sizes and shapes for SAFETY’S SAKE.

What do you do if you overcharge car AC?

If your AC isn’t working because the system has been overcharged then the most obvious solution to the problem is to remove some of the excess coolant that’s been pumped into the system so you can get back down to the normal pressure that you’re supposed to have.

Can you still recharge R12?

No you can not recharge an AC system equipped with R-12 unless you are a licensed technician. You can convert your AC system to R-134 yourself, once the R-12 is dealt with correctly.

How do I recharge my air conditioner?

DIY Car AC Recharge in 8 Easy Steps

  1. Determine Ambient Air Temperature.
  2. Locate the Low-Side Service Port.
  3. Wipe Away Dust.
  4. Attach the Charging Hose.
  5. Add Refrigerant.
  6. Charge the System.
  7. Remove the Charging Hose.
  8. Check the Service Port Cap Seal Before Reinstalling.