relay? switch?

[doublearrow]

I have a 1987 silverado and i recently put all new ac components in under the hood. Its been running great. But i havent been using it the last couple of weeks due to cooler temps amd i kept hearing a thunk at stop signs or low speeds. Turns on its my ac compressor kicking on even while every switch is in the off position. I looked for a relay to the ac system that could possibly be stuck. All i found was the fuse. Is there a relay or something else i should look for? The defrost is off ac off fan off its all off. Is it supposed to run? Thanks for any advice in advance.
Posted via Mobile Device