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Not unless you've bought a special ac that is designed to work as a heater. No, buy a cheep space heater. However, if it's a window mounted AC unit, you could turn it backwards and it would heat your house. It would also work if you just put the whole thing inside, though not as well.
Correspondingly, can AC work as heater?
In short yes! With the addition of a reversing valve, the flow of energy can be reversed, effectively transforming the air conditioner into a heater! Air conditioning units that are able to do this will have a specific 'heating mode'.
Also question is, can AC work in winter?
An air conditioner unit helps to regulate the temperature of a room during hot weather. Some units even feature a heating element for cold winter days when you don't need to make the room colder than it is outside. If you use your air conditioner's cooling function in the winter, the coils might freeze.
HEAT mode. The unit purely operates in heating mode. The indoor unit will blow warm air into the room until the set temperature is reached. Once the temperature is reached, the inverter compressor in the outdoor unit will slow down and eventually stop.