Quote:
Originally Posted by Cocobeach89
Inexperienced Palazzo operator asking a heating question
On a recent outing we were in need of some heating. I found one thermostat control operated heat. So since only one unit provided heating and circulating air then only one unit provides heat- correct
I also found that when hot air stops coming from registers the blower motors continue without cycling off at desired temp
Question: operating correctly
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Yes.
The furnace has two squirrel cage fan systems one is for the burner (combustion wheel) and one is for air circulation (blower wheel). The burner fan is controlled by the wall thermostat. The air circulation fan is controlled by an internal snap switch set at 80 to 85 degrees. When the internal temperature of the heat exchange hits 80-85 F degrees, the air circulation fan comes on and remains on until the heat falls below 80-85 degrees. The thermostat has no direct control of the air circulation fan.