hvac - Temporary fix for bad contactor? - Home Improvement Stack ... hvac - Temporary fix for bad contactor? - Home Improvement Stack ExchangeAir Conditioner Contactor Wiring - Jul 28, 2015 · How to Wire a Contactor Many large pieces of equipment are powered directly from high voltage lines. These lines far exceed the 120 volts AC standard in most homes. 240 volts AC and 480 volts AC are commonly used for these large pieces of equipment, such as motors, industrial machines, and large household appliances like washers and dryers.. Assuming the yellow and blue wires connect to the coil on the contactor, you can safely connect the two wires from the house to the two wires in the outdoor unit. Prior to doing any work with the wires, verify you have 1) the power off to the furnace/air handler and 2) the power off to the outdoor unit.. air conditioning unit wiring diagrams fig. 1—38tkb018-048 208-230v, 1 phase, 60 hertz a95080 factory power wiring field power wiring factory control wiring field control wiring component connection field splice junction cont contactor cap capacitor (dual run) *ch crankcase heater comp compressor *ctd compressor time delay *dsv disch. solenoid.
AC contactors can wear out and are at the top of the list of common air conditioning service failures. Even if your contactor is working, it pays to replace it every five years or so. Unscrew the old contactor before removing the wires.. Air Conditioner has been selected. If you need parts for a Central Air product, please select the Central Air product type from the "Shop Parts" menu above.. Electrical Wiring Diagrams for Air Conditioning Systems – Part One In Article " Electrical Rules and Calculations for Air-Conditioning Systems – Part One ", which was the first Article in our new Course HVAC-2: Electrical Rules and Calculations for Air-Conditioning Systems, I.