You say (炉子还在运作, 停不了了, after 温控器调到off 的位置) is it only the Fan non stop working? Or the furnace/gas burning all working?
If the furnace problem is controller relate, 温控器调到off 的位置 can not prove the problem, you may want to test the funrace "CPU Controller" and ,
1: Power off the furnace completly, there is a switch in the furnace area,.
2: wait for 1 minute. check if the fan stopped.
3: Fan should stop after power is switched off.
4: After 1 minutes switch it back on,
5: If the fan running again after switched back on.
6: It mean the relay or the control circuit is "STUCK CLOSE"
PM me if you like, I can explain to you on phone. I am not a technician, but I look after my own home and my friend home for long time. Understand how it work and how to trouble shooting
If the furnace problem is controller relate, 温控器调到off 的位置 can not prove the problem, you may want to test the funrace "CPU Controller" and ,
1: Power off the furnace completly, there is a switch in the furnace area,.
2: wait for 1 minute. check if the fan stopped.
3: Fan should stop after power is switched off.
4: After 1 minutes switch it back on,
5: If the fan running again after switched back on.
6: It mean the relay or the control circuit is "STUCK CLOSE"
PM me if you like, I can explain to you on phone. I am not a technician, but I look after my own home and my friend home for long time. Understand how it work and how to trouble shooting