Reasons Your Burner Won’t Stay LitDirty flame sensor The flame sensor is a safety component that detects whether or not there is a flame in the combustion chamber. If this sensor is dirty, the dirt can cause the sensor to operate intermittently. When this happens, your furnace will most likely light, but because the sensor can’t properly detect if a flame is present. The sensor may signal the ignition cycle to end, which your furnace won’t stay lit. Broken thermocouple A thermocouple is a safety component that uses two different types of metal wire to measure the temperature of the flame. This is so it can manage the gas flow to the burner. When the thermocouple senses that the flame isn’t hot enough, it shuts off the flow of gas so that your home isn’t filled with flammable gas. If the thermocouple malfunctions, it can incorrectly shut off the gas, which your furnace won’t stay lit. Tripping pressure switch A pressure switch is another safety device, mostly on newer systems, that will shut your system down if it detects the venting in your system isn’t operating correctly. Improper venting can be caused by dirty air filters, blockages or obstructions in the ductwork, or blocked registers.
这里的xdjm懂得多,能帮忙分析一下有可能是什么原因吗?
如果转动,说明sensor是正常的,检查(1),(2) 如果不转动,查看(2)
(1)控制板的fuse更换新的, (2)加热传感器不灵敏,一般就是用一美元摩擦下就好了。 (3)查看风扇的电路有没有正常工作, 查看Motor run compacitor是不是好的。
fuse一般长这个样
sensor 可以在往上查查你furnace型号。
Motor run compacitor