2002 Honda Civic A/C not working

how do you know if it is actually the ac compressor that is at fault ( perfectly good ac compressor from a wreckers /junk yard are available to suit your car at around 70% saving on a new unit )
there are several safety switches in the system that prevent the ac compressor from working
the main reason for ac failure is loss of gas from a leak
next while you can replace the ac compressor yourself , if you have the tools and the know how you will still need a vacuum pump to vacuum the system down to remove the air and a set of gauges to get the right pressure when regassing
first move is to go to an ac specialist shop and have it properly diagnosed and a quote
Then you will and an idea how much you will have to save to get it fixed

if system is low on Freon, compressor will not turn on

Could be TPS sensor[RPM].

I have the same problem right now, and from what I can figure, it looks like an intermittent thermal protector switch on top of the AC compressor. My 2003 Civic air conditioning works fine for 20 minutes or so and then stops working. If this switch is faulty, the compressor clutch won't engage and you won`t get cold air. I will get it replaced soon, but it seems like the access is not easy.

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

I would try recharging the system. if the recharge doesn't produce could air, this will confirm a compressor failure.Inspect the clutch function. the AC clutch should click when it is engaging the compressors actions.

Check first to make sure the belt didn't break and fly off. If didn't, and it is still turning when the engine is running, have someone else push the A/C button while you look at the compressor. There is a clutch on the front of the compressor that should click in.

If it doesn't, I'm pretty sure you have a bad clutch; the compressor itself is most likely still good.

Sirwriter

This is being caused by a low charge in the AC system, the idle is due to the rapid kicking on and off of the AC compressor on the engine, each time the compressor comes on the computer raises the idle and then drops it when the compressor turns off. U have no cooling right? U have a leak in the AC, have the leak fixed and then get the system re-charged.

Check the AC relay at the engine compartment. Remove it and clean out the connections. Put it back in and try to start the AC.Gently tap the relay with the backend of a screwdriver or similar object. Sometimes relays get stuck either in the on position or off. especially if they are a few years old.If it starts, replace the old one with a new relay.

hi mercedes,

here is another thread that is almost similar to your problem, i just paste it here with my reply...

posted by Ron0293 on Sep 27, 2008 Report abuse
1985 toyota Camery in hot weather the car AC quits and will not engage the pump. After it cools the pump will come on again. When this happens the AC button in the car blinks. i know this is a vacuum and/or temperature sensor but i don't know which one it is. The manual I have does not say anything about it. Other wise the AC works just fine. Ron Comment by Ron0293, posted on Sep 27, 2008When I first turn it on the AC is working fine, blowing cold air all the time, the clutch pump is in gauged...when the problem occurs the clutch disingauges and then no cold air.. Comment by Ron0293, posted on Sep 27, 2008When I first turn it on the AC is working fine, blowing cold air all the time, the clutch pump is in gauged...when the problem occurs the clutch disingauges and then no cold air.. It is a sensor somewhere telling the pump to turn off. Comment by Ron0293, posted on Sep 28, 2008there is nothing wrong with the whole AC system when the compressor is pumping! no holes, no leaks, no heater problems or fan problems. The compressor keeps cutting out when the temperature starts to climb. I believe the system has a motor vacuum load/temp. sensor that cuts the AC out when the motor temp. rises from extra load. IE: like going up a long hill. I just don';t know where the sensor is located and the clutch wiring from the compressor is impossible to follow, as it is buried in a wire harrness. Comment by Ron0293, posted on Sep 29, 2008 There are two fans located at the rear of the radiator. They don't seem to be running when the AC pump cuts out. There is a sensor switch on the dryer. when the pump is acting up if i disconnect the sensor wiring the fans start running on high. There is also another sensor on the pump and when i disconnect it the fans start running on high. replacing the wiring returns the fans to off.
There is also a sensor, seems to be internal on the pump and when I disconnect it nothing happens. if(typeof LIB_LOADED == 'undefined'){document.write(''); } Add a Comment