请教一下空调可以启动冷气却无法turn on heating是怎么回事

HVAC cooling没有问题，但heating无法启动。请修空调的看了扔下一句要换motor就赶下家去做事了。 想请教一下懂的大侠们，motor坏了的话不是应该冷气热气都启动不了吗？请问为什么冷气没问题，热气却不能turn on呢？

所有跟帖： 

• Is your heating system a gas furnace? -pegasus0- ♂ (299 bytes) () 10/08/2023 postreply 13:27:54

• 谢谢热心回复，明天来修的时候我问问 -chuqi- ♂ (0 bytes) () 10/08/2023 postreply 15:52:23

• 千万别问，问了人家知道你是一窍不通，要狠狠宰你。 -柠檬椰子汁- ♂ (0 bytes) () 10/08/2023 postreply 16:11:57

• 谢谢柠檬提醒，他今天已经给我报价了，parts+labor $482 -chuqi- ♂ (120 bytes) () 10/08/2023 postreply 17:22:57

• Inducer motor like pegasus0 said. Safety feature. If exhaust -RomaVacation- ♂ (202 bytes) () 10/08/2023 postreply 18:37:33

• 换了个gas valve，你还不知道自己的机器是gas heat还是electric heat？ -柠檬椰子汁- ♂ (0 bytes) () 10/08/2023 postreply 18:40:48

• Depend on your local weather and how old is your HVAC system -pegasus0- ♂ (1095 bytes) () 10/08/2023 postreply 19:42:26

• Some inducer motor has capacitors and they could go bad too. -RomaVacation- ♂ (73 bytes) () 10/08/2023 postreply 22:08:16

• 花十块钱换Capacitor,就可以了。与外面的AC一样，电容易坏。motor 不转，电容换一个 -Simiguy- ♂ (0 bytes) () 10/09/2023 postreply 09:41:00