Check flame sensor.
所有跟帖:
• if it is the flame sensor problem the flame will go off in 6 sec -borisg- ♂ (0 bytes) () 01/27/2018 postreply 13:38:47
• 谢谢。修理工来检查一下说没有问题。但是租客抱怨heater fire on and off -jane168- ♀ (0 bytes) () 01/27/2018 postreply 15:44:02