The call for heat(heat pump only, or heat pump and aux heat). And how the dip switches are set.
This kind of irritates me as well. Different modes of operation operate at different fan speeds, and those fan speeds are factory specified for optimum operation. To a certain extent you can customize the speeds through the on board dip switches (fan speed) but you will never have total control over the fan speed.My real question concerns the air flow. When the heat first goes on the air flow is very low. I would like to up it a bit but have no idea what controls it and how to do that.
What controls the speed of the variable speed blower in a heat pump?
on the goodman furnaces there are dip switches which control ecm ramping profiles.I would love the ability to have better control over the fan but if you start screwing around with speed too much then it has to come with the understanding that the machine's seer rating may no longer be accurate, and the manufacture's idea of optimum performance is out the window.
They have ramping profiles as well. They are kind of nice because the blower kind of eases into existence instead of just blasting on, but there is no way of just setting a single consistent speed. The speed even ramps up during defrost (the element fan speed is different from the stage one condenser fan speed). I did fix that by taking the w1 wire from the condenser and connecting directly to the element relay.... in effect simply bypassing the furnace controller so at least fan speed during defrost is the same and it all goes unnoticed.on the goodman furnaces there are dip switches which control ecm ramping profiles.
not sure about their air handlers.
The controller on the air handler sets the speed. Although there are some thermostats which will give a choice of whether the thermostat controls the fan or the furnace controller does.What tells the fan to speed up? The air handler or the thermostat, and when?
Love the way this forum works. I would consider it a model site.
The controller on the air handler sets the speed. Although there are some thermostats which will give a choice of whether the thermostat controls the fan or the furnace controller does.