Question about Heating & Cooling
Is the inducer motor running?
Posted on Dec 13, 2012
Check and make sure that you are getting 24v back on the white wire from the t'stat in the furnace. If yes than your problem is with the furnace. If no, your problem is with the thermostat. You need to establish where the problem is first.
Posted on Dec 13, 2012
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Posted on Jan 02, 2017
SOURCE: the furnace will light up
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, so by cleaning it you have almost restored it to its new condition. Seldom, but sometimes they do go out completely.
Posted on Dec 08, 2010
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