This may have started longer ago than this, but I first noticed it 2 weeks ago. When traveling with the A/C on, all is working fine. Then all of a sudden, the air from the vents is no longer cool, but getting warmer. A few minutes later, All is fine. I check the connections under the hood, especially the small clutch power connector in the compressor. All tight and look good. Since it is intermittent and cooling comes back, I don't suspect a freon problem.
Fast forward to yesterday, driving on the interstate, once again A/C on and all seems proper, then no longer cool air from vents. Now it lasted over 30 minutes. Then it comes back. I stop for parts for my job, after I restart, all is working again. Drive away and in 5 minutes, I lose cooling again.
Open up my laptop on the seat next to me since I have the FSM loaded on it and a multimeter ( which I keep in the spare tire well ), and start probing. The radiator fans are running. When I shut off the A/C, they stop. So the A/C is triggering them. And I notice also the Idle slows when I shut off A/C, so the IAC is also set to A/C engaged.
No voltage at A/C clutch, go back and probe at relay in under hood power box. As soon as I touch the relay ...... Clutch engages. ??? Bad Connection ???, I shut off car, and pull relay. Look at connections on the box, all look good. With a small screwdriver, open cover of the relay. The attached pictures, I took this morning reveal what I found.
Note, these relays DO go bad. They are NOT water tight. They are used all over inside and outside. Keep this in mind when troubleshooting and intermittent problem in any area that has one of these smaller relays.
98S, 2014 Impreza 5 dr Ltd (9 Subaru's since 1978, 7 were 5 sp) ILuvSubaru's