Furnace Blower Low Speed Only

Your furnace s manual tells you whether or not the furnace is blowing low medium or high.

Furnace blower low speed only.

Comfort sup sup 95 ultra low nox gas furnace 59su5 https. The blower motor also begins running but at low rpm. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Each wire has a different speed that it blows when connected.

Models with variable speed blower and inducer motors can deliver consistent temperature control all year long and enhanced humidity control as a part of your air conditioning system. Mars makes the azure motor that s like it. An incorrect low torque setting yields low blower speed. The furnace operates for two minutes or so before it shuts down.

We have 2 of these furnaces and the functioning one is much louder and blows a lot more air at both settings i just wanted to clear that. Our 90 afue rating gas furnaces include two heat. The gas kicks on and is lit by the ignitor. It wires similarly and works the same with 1 2 speed constant fan.

I know that the blower motor should have 3 speeds i checked the wiring when testing the capacitor the heat wire is connected to the med speed and the cool wire is connected to the high speed. If your unit has either of these then the low speed problem may have other causes. For example ecm motors have an electronic digital driver that is set using dip switches or other means. This isn t always the case though so it s important to check the speed with the manometer.

While the black is high the blue is medium and the yellow is often low. The gas is shut off and the induction motor stops running while the blower motor continues to run at low rpms.