nrpyles

So I just bought an 07 f150 lariat a couple months ago, it only has 80k miles. I bought it when it was cold so I didn't have to use the AC but now that it's warming up all it's doing is blowing hot air. I noticed the compressor is not engaging at all, I replaced the AC clutch relay and diode, still nothing. I replaced the low pressure switch and still hot air. It is full of freon so I know that's not it. I thought it could be the blendor motor at first but I don't think that would cause the compressor not to kick in and I did the test on the EATC to see if any codes pulled up and none did. So if anyone can help me that would be much appreciated before I go and drop anymore money to try and fix the problem

chris.c

Sounds like its low. You checked pressures/level or someone else did?

nrpyles

I had that professionally checked

nrpyles

Oh and I failed to mention, it used to blow freezing cold air but I would have to drive a distance and I guess the compressor would kick in but now it's not even doing that

FiremanChris28

Have you checked the fuses and relayes for the compressor?

nrpyles

Yeah I've checked those and they are all good, the only other two things I can think it would be is either a blown fuse somewhere else or AC control unit has a bad connection and needs to be replaced

FiremanChris28

Yea I would check the control unit next man, that's the only other thing I can think of. Unless the compressor clutch or the compressor itself are bad.

lyricspap

check the clutch connection for power when you have the ac on if you read voltage then clutch would be bad

nrpyles

Where do I check for that at?

lyricspap

put it in defrost and see if it cycles on and off like it should that would point towards ac control