Thread: Floor heat
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Old 12-29-2017, 04:32 PM   #2
chuckster57
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Location: Modesto
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As long as the fan is turning fast enough to allow the gas to ignite, you don’t need to be plugged into a higher amp service. If you have warm air out some and cool air out other registers ( outlets) I would suspect either a blockage of some sort, or maybe the duct has come loose from the heater exchange box.

Locate your heater. You may have to remove the screws holding in a grill to inspect things. The ducts are inserted into holes and rotated, not common but I have seen some come undone or not put on properly. If all the ducts are attached, then you may have kinks or debris in the duct work.

Another issue I have seen is smaller diameter ducts used for longer runs and such. Air like water will take the path of least resistance, and it’s not uncommon to get good flow from the 3” duct and lousy/no flow from the 1 1/2” ducts. Be careful about covering outlets to redirect the heat, as it may cause the furnace to overheat, tripping the high limit switch and shutting down.
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