bast525

Just saw someone else mention their B13 A/C was bad.

When I bought the car ('91 SE-R), the A/C worked great for one day and then stopped blowing cold air. My first assumption was that this meant there was maybe some kind of freon leak, but then I notice that when I turn the A/C on, there is no sign of the compressor cycling on and off, no change in the idle or audible clicking which is usually very easy to hear on a car with A/C.

Does this mean the compressor itself is possibly bad?

Is non-working A/C a very common problem with the sentra and if so what is usually the cause?

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'72 240Z, stock '81 ZXT motor, EFI, trans & diff, 1G DSM BOV, DIY MBC, Trust I/C, MSD 6A & fuel pump, BEGI FMU set to 70psi @ WOT, 2.5" exhaust, short shifter, Eibach's/Tokico's, 233rwhp/303ftlbs @ 14-11psi (boost drops as rev's increase to 6k, haven't figured out why yet), also a '91 Sentra SE-R, stock and SLOW! but fun to drive.

Inspector12

This is not necessarily an indication that the compressor is bad. More likely you have an open somewhere in the compressor circuit. First off, look for a blown fuse. The fix might be as simple as that. Since yo get no change in idle speed I might assume that the ECM isn't receiving an A/C on indication from the switch. As far as I have seen switches are more likely to fail then any other component.

BikerFry

There's a pressure switch in the system. If there isn't enough refrigerant in the system the pressure switch won't allow the system to kick on. You may have leaked past the critical point.

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Is this forum still full of n00bs learning that you can't boost your daily driver on a part time retail income?

sersr20dk

you are right the pressure switch will shut off the compressor when freon is low so you don't burn out the compressor

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