Remote start systems consist of 2 key parts: a control module/radio receiver and a remote transmitter. The control module is installed into your vehicle, which allows you to remotely start your vehicle with the push of a button on the remote transmitter.
Remote starters are most popular in colder climates, where they are used to warm up a car’s engine and activate its heater/defroster. This is especially convenient during winter months when its snowing and temperatures are subfreezing. However, they can also be used to turn on the a/c in extremely hot climates.