Jake Hounshell

My A/C will turn on at idle, but as soon as I rev the engine above 1700 rpms it shuts off and doesn’t come back on. I had the freon replaced. They assured me there were no leaks or air pockets. What are my next steps?

JRCivic1

Worn out A/C clutch or bad thermal sensor... common failures on the "K" series A/C compressors.

Jake Hounshell

Are are you talking about the AC Clutch Compressor Relay, or something else?

Chrisfrom1986

iTrader: (1)

Most of these cars came with the trash R18 engine, just fyi.

JRCivic1

True dat.

OP, it is not going to be something simple and cheap like an A/C relay. There is a slim possibility that your system is overcharged and your line pressures get too high off idle and thus, the system shuts down. I still think the logical problem is that the A/C compressor clutch itself is worn and slipping under load.

jokerstone

How much is the ac compressor clutch part?

K5^

Wouldn't hurt to try replacing the relay. Simple $7 part, but I do agree it is likely the compressor clutch. Ran into the same problem recently.

Depending on what model you have:

R18 Part # 38900-RNC-Z51 approx $250
K20 Part # 38900-RRF-Z51 approx $183

(Prices courtesy of majestic honda )

Javane

So I have a 2008 Civic Si and here we are in summer and the A/C seems to be not working.

I have been reading forums trying to figure out what my problem could be and so far I have been unsuccessful. I was driving and turned the A/C on and it worked for a little while then it stopped and the air was warm. This happened multiple times and when I checked the a/c clutch, I realized it stopped spinning after a while. I read somewhere this morning that it could be either the relay is bad or the pressure is "too low for it to cut on." I went and bought a new relay this morning and some freon. I know you can't add freon without the clutch being engaged. I changed the relay in Advance Auto's lot and the clutch engaged for about 10 or so minutes but then while driving it cut out again. I went home and it started spinning again so I tried to add the freon. I got a little in the system but then the clutch stopped and wouldn't come back on. I tried giving it a "push" with my tire wrench and the clutch engaged for about 3 seconds before going off again.

With all this tried, what else could it be because at this point I think the whole compressor might be bad. If there is anything else I should be trying please let me know. Obviously if it is the whole compressor, I will need another.


Sorry if I placed this thread in the wrong place.

K5^

Had the same thing happen to me, similar car (08 FA5). You can replace the whole compressor but the main issue I ran into was the compressor clutch. The compressor proper was still fully functional.

An obstacle you may run into is finding a shop that is only willing to replace an entire compressor/clutch assembly vs the clutch alone despite a working compressor. I was fed the whole "reliability of a complete replacement" nonsense and was quoted about 2k for the job.

Luckily though, got a buddy of mine to just replace the single part. Far cheaper and addressed the exact issue I was having. Works fine going on 2 years since the replacement.

TechAssembly

I know it's an old thread but Ill still give it a shot.

I had similar issues this year. After verifying EVERYTHING.. it turned out to the that **** AC Control panel. (The buttons to turn ON/OFF the heating and AC.

Got one from the scrap and voila! :D