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Suburban furnace greg 1-17-12  
I have a suburban furnace, model#SF30F. It heats fine but when the cycle is done the fan remains on even after the normal cool down period. The fan will keep blowing until it calls for heat again and then it will fire up and heat but again the fan never will shut off unless I turn the furnace off.
Re: suburban furnace Keith 1-17-12  
Hi Greg, First make sure there are no airflow restrictions in the return air, heat ducting, or something covering a heat register. Have the LP pressure checked, the unit could be overfired. You also could have a bad limit switch. Good luck
Re: suburban furnace Laura 3-15-12  
Propane tanks full, indicated light green. Thermostat clicks at 60the degrees but furnace does not ignite, blower does not blow through vents. The air conditioner and fan all works just no furnace.
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