Freedom 90 Fan Speed Adjustment

Old 01-09-14, 06:15 AM
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Freedom 90 Fan Speed Adjustment

I have an American Standard Freedom 90 Single Stage gas furnace installed around 2004 (probably not by a professional). The heat coming out of the vents is excessive and causes the furnace to cycle frequently. Is there a way for me to adjust/reduce the fan speed? I read another post that said it is possible but the instructions were not clear. It mentioned something about moving the wires that connect to the fan. I've attached a picture of my wiring setup.

Any help would be appreciated!

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Old 01-15-14, 08:47 PM
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you can reduce the fan speed but im not sure their is really an issue here. maybe im not understand fully. if you reduce the speed too much you could cause the high limit switch to trip.
Old 01-16-14, 11:47 PM
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Excessive in airflow or temperature?

Sounds like your furnace might be oversized. Does it cycle off during a call for heat?

If there's nothing wrong and it's just oversized, reducing the fan speed won't work; your furnace is designed to produce a certain amount of heat and cutting the fan speed may cause it to overheat and cycle on limit.

Some electronic t-stats have an adjustable cycle rate which if set correctly can minimize overshooting. What's your t-stat model number?

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