From couple of months my hotair station start loosing suction power (and hotair airflow) and yesterday it stop working what was very dangerous because hotair heating element got red hot.
I started repair from checking “pump” module, but after checking outtake hose i found good airflow. – most expensive part is working fine.
I found clog in airflow-meter showed on pictures caused by “flux”.
I fill airflow-meter with isopropyl alcohol overnight and next day all flux was dissolved, just rinse with more isopropyl alcohol and station working like charm 🙂
Very simple but useful fix, recommend check Your station and clean before it clog.