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View Full Version : Why does my fan on my heating system keep cycling on and off

camper5150
Jan 13, 2010, 07:42 AM
I have a reznor heating system and the fan is going off and on every 30 sec. . IT is destracting to the teacher. Thank you!
wmproop
Jan 13, 2010, 09:36 AM
Might start by cleaning the flame senser if it has one,, you didn`t say if heating system was electric or gas or oil.