1.8 hand block Passat. Recently, I found that the warm wind is not very hot, so there will be a cool wind directly during long-distance running. Stop for a while, and then run. Running and running is

1.8 hand block Passat. Recently, I found that the warm wind is not very hot, so there will be a cool wind directly during long-distance running. Stop for a while, and then run. Running and running is not hot again. Let me give you a suggestion. When the warm air is turned on in winter, turn off the compressor (if there is automatic air conditioning and economy mode, the button is ECON). If you don't turn off the compressor, it may be that there is a problem in the conversion of hot and cold air, so when the warm air is turned on, the compressor is working to refrigerate, and the cold air blows the warm air cool. If you look it up on the computer, there will be a fault code of the cold and hot air conversion motor.