The heater box on Chery a5 is blocked. Can the main air pump blow through?

Are you sure the heater tank is blocked? If the heating box is blocked, it must be replaced. What age is it now? Blocking the water tank is rare now. I remember it was really hard to dissect the water tank column by column before 15, and I had to put it back after sawing it with a saw blade. At that time, most of them were soldered.