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Why does a home ac blow heat until it gets about 2 degress below what it's set for and it start's blowing cool air?
Wiki User
∙ 14y ago
That is the function of the fan/limit control on your furnace. When the thermostat nears the point where the room temp setpoint is satified it shuts off the flame. The fan/limit control keeps the fan on for a minute or so to cool the furnace down before shutting off. Conversly, if your watch your furnace at start up you will see the flame lights first but the fan does not come on for a minute or so to allow the furnace to get hot and avoid blowing cold air into the home.
Wiki User
∙ 14y ago
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