Heating, ventilation, and air conditioning systems ... If there is excess flow, the control box partially closes to reduce the flow. This flow change is sensed by components of the main air handling ...

This can happen for lots of reasons, from improper furnace ... Control (IFC) board. There are often five wire colors coming from your blower to your IFC. Each is associated with a different blower ...

and ventilation systems’ (HVAC) blower motors, blower motor resistors, resistor modules, fan cages, relays, switches, controllers, control modules and sensors. One of the easiest, most common (and ...