AC Will not engage
90

Asked by Surf579 Nov 28, 2015 at 04:53 PM about the 2009 Mercury Mariner Premier V6

Question type: Maintenance & Repair

Needed to  replace dual radiator fans , because the drivers side would not
work , as car started to get hotter the other fan kicked in, the one for a/c and
over heating . I also notice that a/c didn't work ,so I thought because of fan
that's why. I changed fan and all that is good , fan works when needed.. But
a/c never worked. Blower is ok goes from 1 to 4 . The lights turn on for a/c
even on high . But no engage . What should I check.first.

4 Answers
64,660

firebird338 answered 8 years ago

First make sure there is freon in the system. If no freon in system it will not come on.

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Surf579 answered 8 years ago

If there was no freon the over heat fan would stay spinning ,with a mariner and a escape they stay on when the pressure senser is reading to low or to high in freon, I know that because I had that problem one ,and fixed it from learning here . So just don't know why the fan and a/c went out at same time now.

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Surf579 answered 8 years ago

i lost my booklet for fuses and stuff, what controls just the compressor alone what no# is the fuses and relays to check . Doesn't ford have a download site for the booklet

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