A/C: How has changed their low pressure switch?

yellowstang1994 · May 24, 2006

A/C: Who changed their low pressure switch?

Hi guys, I determined my low pressure switch is bad for the a/c. The pressure was borderline low when I jumped the connector. I recharged it to about 30psi to put it back into the full range and the compressor still won't engage with the pressure switch connected. I guess that means it's bad. Okay now my question... do I have to get someone to evacuate the system to change the switch? Then recharge it? Also, is there anywhere known besides the dealer that carries the switch? I've looked and it doesn't look like an item autoparts stores regularly carry. Thanks guys!

yellowclone · May 24, 2006

To find out if its bad, unplug it and use a jumper wire to see if the compressor comes on. If if does come on, then the low pressure switch is bad. To replace it, all you do is unscrew it and screw the new one in. I did not lose any freon when I replaced mine. I got one at Autozone, its been on there for almost three years, but I think it has gone bad again. I think it was about $10 or so.

yellowstang1994 · May 24, 2006

Thank You! I just didn't want to unscrew it and have a ton of freon coming out at me, lol. I'll keep looking for one before I resort to going to the dealer.

99FiveOh · May 24, 2006

edit: I read your post again and I see what you are saying now. Yes, the pressure switch is bad, replace and all will be well again!

The Green GT · May 24, 2006

When i changed the one on my truck, freon came out, and I knew it would, but I hurried up and put the new one in.

99FiveOh · May 24, 2006

There is a little check valve inside the accumulator that will pop up when the refrigerant tries to escape. Trust us, it won't come out.

The Green GT · May 24, 2006

The_Mustang said:
There is a little check valve inside the accumulator that will pop up when the refrigerant tries to escape. Trust us, it won't come out.

Hm. guess my truck dosent have that.

yellowstang1994 · May 24, 2006

I can't find this thing anywhere at any of the parts stores. I'm guessing it is a dealer only item. By any chance does anyone have a partnumber?

The Green GT · May 24, 2006

yellowstang1994 said:
I can't find this thing anywhere at any of the parts stores. I'm guessing it is a dealer only item.

They didnt have the one for my truck at the parts stores. I went to a junkyard.

99FiveOh · May 24, 2006

it's not a dealer only item. Please don't pay them all that cash for it. Where are you located yellowstang? Did you try Autozone, Advanced Auto Parts, Pep Boys, Napa etc.

99FiveOh · May 24, 2006

Oh, and make sure they are looking up the proper part. I can't tell you how many times I called these dumb a$$es at these auto parts stores and they say they don't have it.. then, I go in and viola!, they find it. If they don't know where to look in there computer, they'll never find it. That low pressure plug is used on literally EVERY SINGLE FORD car from mid 80's till now.

yellowstang1994 · May 24, 2006

I'm located in the tri-state area (Delaware) i've searched for it on autozone's, advance auto's, and napa's search engines but didn't check pepboys out yet. I guess i'll call all them stores tomorrow to re-confirm.

99FiveOh · May 24, 2006

Ok, I'll tell you what.. I'm going to call Advanced and Autozone, get the part number and post them for ya.. then just call them and tell them the PN. back in a few.

99FiveOh · May 24, 2006

Ok, eveidently WELLS inc. stopped making the part which is why Autozone doesn't have it. Neither does Advanced. So I called carquest and they do carry it. 18.38$. Their part number for it is: CTC207404

I'm almost positive Napa will have it being that they make alot of their own parts.

If all else fails, I'll go buy one and send it up to ya.

yellowstang1994 · May 24, 2006

Thanks a lot man, i'll check napa and see what they have tomorrow.

JOEGTS · May 24, 2006

I got mine from the dealer for under twenty dollars.

99FiveOh · May 24, 2006

JOEGTS said:
I got mine from the dealer for under twenty dollars.

I guess if the dealer has it that cheap, you can't go wrong! I figured they wanted a boat load of coin for it.

Blackened302 · May 25, 2006

got mine from Advance: $20. simply disconnected and unscrewed the old one, screwed the new one and reconnected it and voila--compressor kicked in and a/c worked.

i have a leak somewhere, now, though... p.o.s.

yellowclone · May 25, 2006

Punisher302 said:
i have a leak somewhere, now, though... p.o.s.

Have it recharged and have them put some dye in it to find your leak . On mine it turned out to be the condenser and it looked brand new so that would have probaly have been the last place I looked. It costed alittle more at the time to get the dye put in, but it saved me lots of money down the road.

yellowstang1994 · May 25, 2006

Thanks guys!!! I found the switch today at NAPA and put it on and the A/C is back to blowing cold! Thanks again!

For future reference:

Ford OEM #: F3AH-19E561-AA $30.60
NAPA #: 707404 $21.69
Carquest #: CTC207404 $18.38

Also, you won't have much luck searching for "low pressure switch". Ford calls it "pressure cycling switch"

A/C: How has changed their low pressure switch?

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