What fan speed should my air handler be on?
What is the Recommended Speed for Your Blower? For peak performance, most AC manufacturers suggest that 400 cubic feet per minute (CFM) per ton of air conditioning should be used, meaning that 800 CFM should be moving through the evaporator coil for a 2-ton system, and so on.
What does a jumper wire do on a thermostat?
Most of your current thermostat’s wires will be connected to your thermostat and go through the wall to connect to your HVAC system. However, some thermostats will have a jumper wire that doesn’t go back through the wall to connect to your system. Instead, a short jumper wire connects two thermostat terminals together.
What is the difference between R and RC on a thermostat?
In a thermostat, the R wire is responsible for powering the entire HVAC system (through a transformer). If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc.
What is the fan setting on a HVAC system?
The fan setting on your thermostat controls your HVAC’s system blower. The blower helps circulate hot or cold air throughout your home until the temperature on the thermostat is reached. There are two settings on your thermostat to control the fan – auto or on.
Can a central fan be run at a lower speed?
In fact, many of them can run the fan at a lower speed when running independently of heating or cooling, meaning they are constantly mixing the air in your home without causing unwanted noise or unneeded airflow. If you’re not sure if your system has this capability, give us a call to schedule a maintenance.
How do you set the fan speed on an air handler?
Inside the air handler, usually on a control board (a printed circuit board) there will be one or more switches or little jumpers that the service technician can set to control the fan speed or speeds on the particular air handler. It’s usually a switch or jumper change, or occasionally on older air handlers, moving a wire from one pin to another.
Where do the red and black jumper cables go?
The red cables lead to the “+” terminal and the black cables go to the “-” terminal. Check the terminals for corrosion first. It looks like white, green, and blue powder. Clean the terminals by wiping them with a rag or wire brush. Separate the jumper cable clamps by laying them on the ground.