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Potterton heater comes on a then goes of after about ten minutes

My heater will not stay on and keeps going of after a short period of time

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If it lights for about 3 seconds and then goes off, you may have a dirty flame sensor. usually this sensor looks like a metal rod that sticks in front of one of the burners. it will have a single wire with a spade connector running to it. usually the ignitor will be on one end of the burner row and the flame sensor on the opposite end. you can remove the wire and take the flame sensor out. use some steel wool or emery cloth to shine it up real good. try this and let me know. if it doesn't work, give more details like make and model of furnace and approx. age.

Posted on Jan 30, 2009

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