The wire from the compressor goes to a plug on the harness on the condenser about halfway down. It may be easier to see it from underneath. The harness wire from that plug then goes to one of the relays but the compressor wire does not plug directly into a relay.

Looks like the relief valve on your compressor has blown. It is under the heat shield plate on the back end of the compressor. It is a one-time thing that has a core of soft metal that blows out under excessive pressure or heat. I think it can be unscrewed and replaced without changing the whole compressor.

 

so you think i should replace that and see what happends or should i just get a new compressor? and where would i buy a piece like that.

 

Take the plate off and see if that's really what happened. If it is instead the compressor case cracked or something you will need a new compressor anyway. I don't know if you can buy the valve separate but you may be able to take it off of a "dead" compressor at a junkyard.

 

iight. thanks. another question. doesnt relate but close.....how do i know if my thermostat is stuck open or not. i thought i read somewhere that if the top hose is hot to the touch and the bottom is not then something is wrong. nnot sure what tho. and now i cant find it. but i checked the hoses and the top was really hot where the bottom was not hot at all. i could grab it and nothing. top was too hott to touch. new thermostat??

 

Thermostat stuck open will cause the engine to not warm up to normal temperature. The gauge on the dash will stay at or near cold instead of going to the normal range of halfway up.

The top hose will always be warmer than the bottom hose. The only time the bottom hose will get very hot is if the car has been sitting still idling for a long time with the fan not running. The temperature of the coolant in the bottom hose triggers the fan to come on.

 

iight mk378. i got under the car and looked where you said and found this...

is this the harness you were talking about. its the only one that i found. it has the red wire going in and then nothing else coming out. and does the black wire go on top of the harness.thanks for the help btw.

 

Yes, that is it. Plug the wire from the compressor into that empty socket with the red wire.

The other wire (black) from the compressor coil should be grounded to the compressor frame. A stock compressor has only one wire leaving it, a red one.

 

ok i was alittle confused...because the wire i was looking at was black. but its a sleeve type of deal and the wire under was red. so i put it in that socket on top...as for the shield thing...i took it off and didnt notice any damage. maybe its over charged. how much would a ac place charge me to un charge it and then recharge it. or should i have them first check if there is a leak somewhere.

 

ok....so after connecting the wire and charging the system..it started blwoing cold air. but it started leaking again from the pressure release valve. i maybe overcharged it. but when i removed the fridgerant connector..it started leaking from the adapter/valve. so all the fridgerant leaked out. so as soon as i fix that...then my ac will work fine. can you buy this piece or do i have to take it off another car. thanks

 

You will have excessive pressure (and sub-optimal cooling) if you don't remove the air from the system with a vacuum pump before charging. Probably though your relief valve is just leaking all the time and needs to be replaced. Charge the amount shown on the sticker. On most Civics it is about 18 oz, i.e. one and a half 12 oz cans.

The valves in the service ports can be replaced. They unscrew like tire valves but are not the same materials as tire valves. Ask at the parts store for A/C "shrader" valves. Slight leakage sometimes normally occurs. You need to put the plastic cap on to be sure the refrigerant stays in.