furnace 不work， pressure switch 不turn on

Not enough vacuum suction to turn on the pressure switch. 帮忙诊断一下。什么原因会导致没enough vacuum吸力呢？

所有跟帖： 

• 看看接压力sensor的管子堵了没有 -pigtiger1973- ♀ (0 bytes) () 10/22/2018 postreply 21:22:15

• 好像没堵啊， 通了没任何东西。 有点潮 -201411- ♀ (0 bytes) () 10/23/2018 postreply 04:20:10

• inducer motor is dying.... just replaced one for 150. -borisg- ♂ (0 bytes) () 10/23/2018 postreply 07:05:43

• 谢波大， 是不是买一个就行还是非得买同牌子的 -201411- ♀ (0 bytes) () 10/23/2018 postreply 07:44:37

• got to be the same model. -borisg- ♂ (0 bytes) () 10/23/2018 postreply 08:04:36