Households in Census QuickFacts
U.S. Census Bureau QuickFacts counts 13,840 households in Blacksburg for 2020-2024, at 2.54 persons per household. For the same period, QuickFacts puts the owner-occupied housing unit rate at 35.8%.
Weather data
NOAA's engineering weather data has no station near Blacksburg; Roanoke, about 35 miles away, is the nearest listed.
Built around the changeovers
A heating and cooling system has two big moments each year: the day it first switches to cooling, and the day it first switches to heat. This list is organized around those changeovers and the stretches that follow them, with a short set of chores that apply in any month. Lines marked Technician call for gauges, a meter or a combustion analyzer. Everything else is owner work.
Before you open a panel or reach toward the outdoor unit, set the thermostat to off and cut power at the switch beside the furnace or air handler and at the outdoor disconnect.
Any month
- Slide out the filter and check it against a lamp. Once light struggles to come through, swap in a fresh one and mark the date on its edge.
- Keep supply registers open and return grilles free of furniture, rugs and curtains.
- Pay attention when the system starts up. Jot down any new rattle, squeal or buzz, along with the date.
- Glance at the floor around the indoor equipment for water, rust or scorch marks.
The first cooling day
Pick a comfortable day before you actually need cooling, and work through these first:
- Clear leaves, twigs and anything stored against the outdoor cabinet, and cut plants back to the spacing its manual gives.
- With the disconnect off, rinse the coil fins with a gentle flow from a garden hose, top to bottom. Keep a pressure washer away from them.
- Check that the pad still sits level, and that the foam sleeve on the larger copper line is whole.
- Find where the condensate line ends. Pour a little water into it, or into the condensate pump's reservoir, and watch that it drains.
- Switch to cooling, wait a few minutes, and feel the air at a couple of registers. Stand by the outdoor unit and listen.
- Technician: refrigerant pressures and temperatures written on the ticket, the capacitor, contactor and wiring connections, the indoor coil and the blower wheel.
Through the cooling months
- Look at the filter more often while the system runs long hours.
- Shine a light into the drain pan under the indoor coil. Standing water there points to a slow drain.
- Keep mower discharge and hedge clippings pointed away from the outdoor fins.
- If a room stays warm into the evening, or the house feels clammy even when the thermostat is satisfied, write down the time and setting for the next service visit.
Turn it off and call if you notice
- frost or ice on the copper lines or the indoor coil (set the system to fan only while you wait);
- water spreading around the air handler or furnace;
- an outdoor fan that hums but does not turn.
The first heating day
Again, test ahead of need on a cool day:
- Run the heat and let it go a while. A brief dusty smell can be normal; a smell of hot plastic or wiring is a reason to shut it off and call.
- Press the test button on every smoke and carbon monoxide alarm, and put fresh batteries in any that take them.
- If the furnace vents through plastic pipes in a side wall, check both openings for leaves and nests.
- On a whole-house humidifier, fit a new water panel and reopen the supply valve.
- Set the thermostat's heating schedule, and replace its batteries if it uses them.
- Technician (gas or oil furnace): burners and flame, ignitor and flame sensor, heat exchanger, venting, gas pressure where it applies, and a combustion and carbon monoxide reading written down.
- Technician (heat pump): reversing valve, defrost controls and the backup heat circuit.
Through the heating months
- A heat pump may frost over and run a defrost cycle; a cloud of steam and a short pause can be part of that. A unit sealed in ice that will not clear needs service.
- After any snow or ice, clear the outdoor unit and any side-wall vent pipes by hand or with a soft brush.
- Note the days the thermostat shows auxiliary or emergency heat, and mention them at the next visit.
- With a heat pump, ask your technician whether deep overnight setbacks bring on backup heat in the morning, and what setting they suggest.
- If water beads or frost forms on the inside of the windows, turn the humidifier down.
After an outage or a storm
- When power returns, wait a little before restarting the system, then check that the thermostat held its settings.
- Walk around the outdoor unit for fallen branches, bent fins, a shifted pad or debris inside the cabinet.
- If water reached the indoor equipment or the base of the outdoor unit, leave everything off until a technician has looked.
- Photograph any damage before cleaning up, and ask your insurer what it needs.
Warning signs, any season
- A breaker that trips again after a reset.
- A system that starts and stops every few minutes.
- Soot near the furnace or its vent, or a yellow, wavering burner flame.
- A burning or electrical smell. If you smell gas, leave the house and call the gas utility from outside.
- A carbon monoxide alarm. Get everyone out first, then call from outside.
Before replacing equipment
When a repair quote climbs, ask that company to price a replacement too, and put these questions to anyone quoting new equipment:
- Will a room-by-room load calculation come with the proposal, in writing?
- What is the AHRI reference number for the exact indoor and outdoor pairing?
- Are duct testing and sealing part of the price, or separate lines?
- What state license or registration, if any, covers this work, and what is the number?
- Does the town need a permit for the job, and who applies for it?
- Can I see proof of liability coverage and workers' compensation before work begins?
The record to keep
Clip a sheet inside the closet door by the air handler, or keep a note on your phone. Log the filter size and each change, every service visit with the date, the technician's name and what was measured, any refrigerant added, parts replaced, and the model and serial numbers of each piece of equipment. A record like this gives the next technician a starting point and gives a warranty claim dates to point to.