Furnace goes on then off?

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Old 12-13-08, 12:33 PM
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Furnace goes on then off?

Hello all, noob here. I have an Allstyle Coil Company furnace, model #AS36A244T. The unit will start, the one thing (not sure what it's called) will glow red-hot, the ignitors will click and the flame will start. After a couple of seconds, the one thing will dimmer low and the flames will quit, almost like the unit is shutting down. Then it will start again, with similar results. After 4 times the unit will shut down permanently. I'm going to check all the filters and the breather through the roof. Before i replace anything or call a Tech, any suggestions??
 
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Old 12-13-08, 02:43 PM
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Symptomatic of a "flame sensor" that needs taken out and polishing back up. Usually one of the easiest DIY jobs next to changing out furnace filter. I wonder what pros charge for coming out to clean one?
 
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