On Sep 28, 10:08 pm, remez...@yahoo.ca wrote:

you should be more specific about your sentra, what year?

in general, it could be one or more of many things.  for a start,
try locating all AC related relays under the hood, with a cold
engine, start  engine, and assuming both fans are running, tap
on each relay with the end of a screwdriver, one relay at a time,
to see if the AC fan stops running.

if this causes AC fan to stop running, look at AC compressor
to see if compressor is not running (not just the clutch, i mean
the compressor).

if AC fan and compressor are not running after a specific relay
is interrogated, replace that relay.