Automated Air Compressor code

[Japper]

We are having problems with ours also....

We tried the code:

relay07_fwd != rc_dig_in07;
relay07_rev = 0;

and the pressure switch is connected to digital input 7 with the signal on one side of the switch and ground on the other side of the switch, the spike controlling the compressor (spike 7) is on all the time and the air compressor will continue pumping until after I disconnect it at 125 psi... it should shut off at 120 I thought but when I connect an ohm meter to this switch, it is open regardless of the air pressure (< 90 or > 120)...

I thought I read that the presure switch is normally closed but opens when the pressure dips down below 90 psi and then remains open until it reaches 120 psi... is this correct?

Is this a bad pressure switch or is there something that we don't have connected correctly?

Thanks