I have an A/C problem

[Zurcs]

I have an A/C problem 93 s13The A/C stopped cooling.The light on the dash A/C button dose not come on, but the other button lights work.The Fan works on all speeds.I have changed the relays under the hood.I have checked the fuse under the dash it is good.I have went to the junk yard and found 3 other 240s and have tried changing the A/C control units without any luck I have check with Nissan for an IC Board for the control unit, this board has all the A/C and Fan Switches mounted on it. I have taken this IC Board out and it dosnt look burnt or damaged.What I think is for some reason the A/C switch is not getting power to send to the under hood relay to kick the compressor on. I have tested the switch on the IC Board and it is working fine. So my AC Compressor wont kick on unless I jump it out at the relay under the hood, and the light that is in the AC Button wont come on when pressed.Thanks for any help

[Wc240]

you sure its charged? one common thing to check is the dual pressure switch. if its too low, or broke, it wont let your comp turn on.

[theother1wstolen]

also check your thermo control amp.

[ShaunakaRichard]

I second the dual pressure switch. I had the exact same symptoms, ended up being that switch. Easy way to tell is to unplug the switch and put an ohmmeter between the two wires of the switch. There should be continuity, 0 ohms.

[Zurcs]

dont know i checked all the relays under the dash and the termo amp didnt work then i took off the battery to use on another car and after i put the battery back on the 240 it worked so far so good

[slipknot555_666_69]

im having the same problems to anyone have pics of that switch?

[Wc240]

its on the reciever/drier witch is down next to your fuse box. lil taller than a beer can.theyll be lines running into both sides on the top, and another thing about a 22mm looks plastic, two wires, thats the switch

[NIzmoS13]

i have the same problem my light switch for AC doesnt come on and i have recharge my A/C if anyone have a picture of what could be the problem to replace that would be awesome.

[r3v_v3ng3]

mine is doing the same thing. the switch on the receiver/drier wires are acting up. if i move em around and it'll turn on at the right spot

[NIzmoS13]

Im going to try that when i get home, messing with those wires see if it actually kicks on or what..... hopefully it works

[m240sxDrifter]

same issue here. When I swap my motor out from a SOHC to a DOHC. I had to rewired the wires cause the main data cable has a different plug and now I cant get my a/c to kick on. THe light never came on when I turn on AC.. And the heat is cooking me in the car.