RSC12-9018, Robertshaw,

The Ranco® Heat / Cool Controls replace many OEM controls which govern the on/off compressor function. Heat and cool controls are found on room air conditioners such as packaged terminal, room and through-the-wall heat and cool units. Features and Benefits Fixed or adjustable temperature settings Laser-welded stainless steel sensing elements Narrower differentials attainable C12 can be used for cool only units or heat/cool units when used with a separate changeover switch C17 has two SPDT electrically isolated switches, calibrated at different set points and differentials Two stage SPDT switches are staged 3.5°F