If your air conditioning system is badly damaged https://www.hamiltonaircons.co.nz/page/heat-pumps/ can help you out, it is important to completely evacuate all the old freon. This is due to the fact that the system is designed to work with only one element inside. Water is an uncondensable gas, so when it enters the system, it reduces efficiency until the compressor overheats or any other part of the HVAC fails.
The heat pump in the air conditioner is the person's best friend in the winter. With this pump installed in the air conditioner, the cooling cycle in the air conditioner can be changed to reverse, where heat is produced indoors instead of cold air. This pump is usually called and is known as a reverse cycle air conditioner. Typically, this is a more reliable pump compared to the electrical resistance, since this pump has a higher efficiency.
Some people prefer to have a heat pump system installed in their air conditioner, where it allows a reverse cooling cycle during the winter to roll over. By turning on the pump, the coil changes its role, turning into a condenser coil that generates heat, and not like an evaporative coil that generates cold air.
This system is more popular in mild winter climates with a temperature of 4 to 13ºC. This is mainly because in places with extreme winter the coil of the outdoor unit freezes and directly blocks the airflow over the coil, which makes this pump ineffective in such circumstances. To overcome this issue, the system should be able to temporarily return the evaporator coil back to the condenser coil for the outdoor unit to heat and disconnect the coil. Therefore, electrical resistance heating is created, and at the same time, unwanted cold air is introduced into the room. Thus, the icing problem is more common in cases with a lower outside air temperature, which makes heat pumps replaced by natural gas or an oil furnace in a more extreme winter.