Furnace Misbehaving? This might help. OFF TOPIC
Yesterday evening we got home and the house was cool. We had been turning it on and off according to the weather, so I thought maybe it had been turned off. This morning it was a little to cool for these old bones, so I went to turn it on at the thermostat. The temp reading was 63, but set at 68. I had to get to work, so I went to the electric panel and turned it off for 30-seconds, then switched it back on. I heard it start up and things sounded normal. As I went out the door, I heard it kick off (not at 68).
Got home this evening and checked things out. Looking at the front of the furnace, you'll see a clear peep hole.
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Inside you will see a red light. The led light blinks a code. There will be a long pause, then a number of blinks followed by another number of blinks. This is the code that your furnace is letting to know what is wrong. My code was long pause followed 3-blinks followed by 4-blinks (led code 34).
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One symptom of #34 is Oxide buildup on flame sensor (clean with fine sandpaper).
Lift the top portion off with help of a screw driver to pry up.
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This what my upper portion looks like.
http://i285.photobucket.com/albums/l...psil5nsvvg.jpg
The blue flame kept kicking on but won't stay on for more than 15-20 seconds. It would try again (3 times) and then shut down. Next, I removed the lower cover, which shut the power off with this switch.
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This what my lower portion looks like.
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You can observe the board for any MR. OBVIOUS problems. (burnt, discolored, bad odor, ect)
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Mine looked good so I moved on to the flame sensor. The flame sensor is located somewhere around the burner tubes. It is electrical, so your looking for a single wire. Mine is (white wire) located below the burner tubes.
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A simple 1/4" socket is needed to remove one hex head screw. Turn it to the left to unscrew and turn right to re-tighten later.
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This is my flame sensor. It didn't look bad or any build up. I took a dollar bill cloth and sanded the sensor. Be sure to not touch it, which adds oil.
http://i285.photobucket.com/albums/l...psupniyftf.jpg
Reinstalled the sensor. Put the covers back on and life is back to good.
30-min fix, including clean-up. Hope this helps and saves you from paying a service tech your hard earned cash. Now you can donate it to Yates at a crappie tourney coming to your neighbor hood.
BE SMART AND TURN THE FURNACE POWER OFF AT THE BREAKER BOX.
BE SMART AND SAFE!
Heading back to the couch.
