I just installed a/c into my 1990 civic hatch STD. All lines are good. No leaks. And both of my a/c fan and raidiator fan stay on when the a/c is turned on. The compressor clutch won't move unless I hook the red wire up straight to power. And at first it was loud, After a min I took it off. Then I put it back on and the whole car bogged so bad it shut the car off. So I left it hooked up and started it back up and it Ran OK, but the commpressor needed straight power to run. I unhooked the switch next to the batery and both fans turned off. I'm at a loss and my son is dying from heat. If anyone could help please let me know. This was already searched btw

 

Any help would be great

 

Sounds like your high pressure switch is bad.

 

Have you checked with a gauge what the actual pressure is in the system? If it's leaking/low on refrigerant, the low pressure cut out switch will not allow the compressor to engage. And of course, there is a reason for that. It protects the compressor from damage. So dont run the compressor manually until you've had a look at the pressure. If there is refrigerant in there, with the engine off, gauge should read same as ambient temperature. So if it's 70 degrees f, gauge should read 70 psi

 

Ill double check that tomorrow. Thanks.