Control system for a recreational vehicle's air-conditioning/heating unit

A secondary control system for the air-conditioning/heat unit of a RV, said air-conditioning/heating unit including a primary control at said unit for automatically adjusting the temperature ambient said unit, and a circuit breaker through which power is suppled to said air-conditioning/heating unit from a power line, said secondary control system comprising:

• switch means provided with a transformer having a primary winding connected to said circuit breaker, and a voltage reducing secondary winding, said switch means further provided with an electromagnetic relay having a coil connected in series with said secondary winding and a normally open contact, said contact being operable by said coil, said contact connected in series with said unit such that said unit is energized when said contact is closed and said unit is de-energized with said contact is open;
• and
• a low voltage control connected to said coil and said secondary winding for placement in said RV at a selected location removed from said primary control to regulate air-conditioning/heating at said selected location, said low voltage control including a single-pole single-throw override switch which energized said coil to close said contact and supply power to said unit when said override switch is closed, and an alternatively operable thermostatically controlled switch connected in parallel with said override switch such that said thermostatically controlled switch controls the energization and de-energization of said coil when said override switch is open.