Question about Carrier Heating & Cooling
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Posted on Jan 02, 2017
One flash on a Ruud furnace indicates failure to ignite. There is a viewing port on the furnace where you can watch the flame. If the ignitor is igniting the burner and then 2 or 3 seconds later, the flame goes out; you most likely have a flame sensor that is dirty or not working. Check to make sure you are getting gas. Check the connections of all wires to the control board. If the sensor is not part of the ignitor, see if you can get to it to clean it with a small wire brush. Make sure there is a good ground connection between the board and furnace frame. If the flame is not traveling all the way to the flame sensor, clean your burners. If the flame burns inside the burners, you may have weak gas pressure. Good Luck.
Posted on Oct 01, 2007
SOURCE: not turning on
Try to reset the unit by disconnecting the power supply for 10sec. and operate the unit. If it wont work replace your Room Air and Coil Thersmistor or test the thersmistor with mulitester. The resistance reading of thermistor is 10 kilo ohms @25deg. C room temp. If it is shorted or open the unit wont operate.
Hope this can help :)
Posted on Jan 08, 2009
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