Heat on in the Morning, AC in the Afternoon: HVAC Tips for New Jersey's Fall Weather
Sweater weather before breakfast and short sleeves by lunch. Does this sound familiar? We get it! October in New Jersey can leave you reaching for the heat in the morning and the AC later that same day.
Keeping your home comfortable through seasonal temperature swings starts with a few simple habits: choose thermostat settings that suit your routine, understand how your system switches between heating and cooling, and keep up with basic maintenance. Here's how to handle fall's changing temperatures and get your heating system ready for the colder days ahead.
Can You Use Heat and AC on the Same Day?
Most AC systems are not designed to run when outdoor temperatures drop below a certain point, typically around 60°F. Running cooling mode on a cold day can potentially damage the compressor, so check your manufacturer's guidelines for your system's specific limits.
That said, a properly functioning HVAC system can provide heating and cooling at different times of day, and needing both during a stretch of changing weather doesn't automatically mean something is wrong.
The key is to avoid constantly switching modes or adjusting the temperature. Give your system time to respond before making another change.
Choose Fall Thermostat Settings That Fit Your Routine
There's no single setting that works for every household. Start with a temperature that keeps everyone comfortable, then consider modest adjustments when you're away or asleep.
For homes with furnaces, lowering the heating setting during those periods may help reduce energy use. A programmable thermostat can make those changes easier to manage.
Have a heat pump? Turning the temperature down several degrees can cause some systems to use energy-hungry backup heat when warming your home back up. That could cancel out the energy savings you expected. Instead, aim for a relatively steady temperature and avoid large thermostat adjustments. An A.J. Perri professional can help you choose a thermostat and settings that balance comfort and energy use for your system.
Know the Difference Between System AUTO and Fan AUTO
The thermostat AUTO setting can be confusing because "AUTO" may appear in two different places.
System AUTO: On compatible thermostats, this setting automatically selects heating or cooling based on your indoor temperature and chosen settings.
Fan AUTO: This controls the indoor blower, generally running it as needed during heating or cooling cycles. It does not determine heating or cooling mode.
With automatic changeover, you choose separate heating and cooling temperatures. Keep the cooling setting above the heating setting, following your thermostat's required separation. This gives your home a comfortable range instead of making the system respond to every small temperature change.
Of course, not every thermostat offers automatic changeover. Check your manual before assuming yours can handle the switch.
Fall HVAC Maintenance Checklist
As fall settles in, some simple checks can help you get ready for more consistent heating use.
Check the filter. Replace it when needed, using the size and type recommended for your system.
Clear vents and return grilles. Move furniture, rugs, or curtains that block airflow.
Check around the outdoor unit. Remove fallen leaves and loose debris, maintaining a two- to three-foot clearance around it.
Check thermostat batteries. Replace them if your model uses batteries and indicates they're low.
Look for drafts. Gaps around windows and doors may contribute to uncomfortable rooms. Look for drafts and seal them.
Know When Changing Weather Isn't the Whole Story
Some adjustments are normal during fall. However, persistent comfort problems usually deserve a closer look.
Schedule service if your system:
Repeatedly turns on and off in short bursts
Struggles to reach the temperature setting
Makes unusual noises
Leaves certain rooms consistently uncomfortable
These symptoms don't automatically mean you need new equipment. A professional can help determine whether the issue involves airflow, thermostat operation, ductwork, or the heating and cooling equipment.
Prepare for the Colder Days Ahead
October's temperature swings are a useful reminder to schedule heating maintenance. A fall tune-up can help identify potential problems before heating becomes an everyday necessity.
Need help with thermostat settings or seasonal maintenance? Contact A.J. Perri to schedule a heating tune-up and prepare your New Jersey home for the months ahead.