1.4 sagitar plus freon warm air is not hot.

The heater water tank is blocked. 1.4 sagitar is a compact car produced by faw-Volkswagen. After adding freon, that is, adding refrigerant, the refrigeration system is normal, so the warm air blown by the air conditioner is not hot because the warm air tank is blocked. The blockage problem can be solved by replacing the impeller of the water pump with a new one. Freon is a common refrigerant with many kinds, such as R22, R32, R 134a, etc. They are all gases under normal temperature and pressure, with a slight fragrance.