Question about Heating & Cooling
First, for those of you who might not know, "What is a flame sensor?" A flame
sensor is a safety device. When your furnace's main burners ignite (light Up)
the flame sensor picks up the heat from the furnace's main burning and says,
"YES," and sends a signal back to the main furnace control board saying that it
is OK to let the main burner stay on. Or if the main burners do not ignite, the
flame sensor does not pick up the heat and says, "NO" to the main control board,
Shut That Gas Valve and Main Burners Down! Thank God we have safety controls
like the flame sensor. Most of the time, after turning your furnace's power off,
you may clean the flame sensors with light sand cloth, emery cloth or steel
wool. Reinstall the flame sensor and you are back in business! Over the years
flame sensors can build up a light coating of burned-in dust and dirt. This
insulates the flame sensor so that it doesn't sense the heat of the flame well
enough, by cleaning it you have almost restored it to its new condition.
Seldom, but sometimes they do go out completely.
Posted on Nov 08, 2010
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Posted on Jan 02, 2017
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