Pressure Switch code

[kE7JLM]

I am having a problem with our compressor, spikes, and RC. I need to get the pressure switch to tell the spike that is connected to the compressor to turn on unto it read 120psi. Yet I don't even have a spike switching to fwd or rev?

I have this code in right now

if(digital_io_18 == 0)
{
relay1_fwd == 1;
}

if(digital_io_18 ==1)
{
relay1_fwd == 0;
}


Can some let me know what I am doing wrong?

Thank you