2009 honda civic ac lower pressure switch - 2009 Honda Civic

Using the switches also makes the shifting smother and saves fuel.

I think the idle, in gear, should be about 750 rpm, definitely not 900. If you are looking at the tachometer, it isn't that accurate visually. a scanner should be connected to get an accurate reading. A little vibration at idle is not abnormal. But you might try adjusting the engine mounts to eliminate it.

Underhood fuse box

necesito codigo desbloqueo honda civic 2009

Check the A/C Heater Fan Control Switch located in the dash to see if the switch is supplying power to the relay when itis turned on.

it might be low on freon...or a bd low pressure switch

You could have a defective pressure sensor causing this.
One more thing, some have a sensor in the spare tire.
Did you check that?

Probbaly insufficient refrigerant causing the low pressure switch to cut out the copmpressor so you don't **** moist air into the system.

high and low pressure swich try putting freon in it

Overcharging could be one issue, but not likely. Sounds more like your compressor clutch is starting to freeze-up. U might wanna try adding some compressor oil in your system, although I believe most rifrigerants do have that as an additive already. Another posibility is that you have a bad pressure switch. There is a switch that will adjust your rpm accordingly when the AC is turned off or on. It is usually located along the lines of the AC system. Good luck!