Basically the thermal sensors adhere to a temperature preset setting maintaing a thermal equilbrium of on/off cycle(s) depending on temperature variation(s)...lol :) However, The switch is probabley a rotary solenoid based, hence pending to delay on the cool side before it rolls over to the hot side, which activates the burner.... I'm guessing you probabley can the burner come on after a while...:) A simple adjustment can rectify this lol....:)
There are two sensors on the burner box of the furnace that control the fan. One tells it when the furnace has warmed up and the other tells the furnace has cooled down. If it blows before the box is hot enough, the limit switch is bad. Any heating and cooling company can get one for you and you can probably switch it out yourself.
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Basically the thermal sensors adhere to a temperature preset setting maintaing a thermal equilbrium of on/off cycle(s) depending on temperature variation(s)...lol :)
However, The switch is probabley a rotary solenoid based, hence pending to delay on the cool side before it rolls over to the hot side, which activates the burner.... I'm guessing you probabley can the burner come on after a while...:)
A simple adjustment can rectify this lol....:)
There are two sensors on the burner box of the furnace that control the fan. One tells it when the furnace has warmed up and the other tells the furnace has cooled down. If it blows before the box is hot enough, the limit switch is bad. Any heating and cooling company can get one for you and you can probably switch it out yourself.