AC pressure is reading in the red

Good afternoon.

Are you using a gauge set that reads the high and low pressure?

What side are you reading?

Does the compressor clutch engage?

Any work done recently?

Roy

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Okay, you will need a set of gauges that can read both the high side and low side pressures.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Without the car running, the high and low sides should be equal and about the same as the temperature outside.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Then when the engine is running and the clutch engages, the high side should be 2 times ambient temperature plus 15%. The low side should be 25-30 pounds rock solid.

You can rent a set of gauges at a parts store for this test.

Roy