HVAC Frequently Asked Questions

Common causes include a dirty air filter restricting airflow, low refrigerant charge (a sign of a leak), frozen evaporator coil, dirty condenser coils on the outdoor unit, or a failing compressor. Start by checking and replacing your air filter. If the problem continues, call us at (703) 347-2616 for a diagnostic visit.

We recommend an annual AC tune-up every spring before the cooling season begins. Regular maintenance catches small problems before they become costly repairs, improves efficiency, and extends the life of your system.

Use the "5000 rule": multiply the age of your unit by the cost of the repair. If the result exceeds $5,000, replacement is usually the smarter investment. Systems over 12–15 years old are also strong candidates for replacement due to efficiency improvements in newer models.

AC sizing is determined by a Manual J load calculation, which accounts for your home's square footage, insulation, windows, orientation, and local climate. Don't just match the size of your old unit — call us for a free assessment and we'll recommend the right size for peak efficiency.

If your furnace blows cold air, check: (1) thermostat is set to "Heat" and fan is on "Auto" not "On"; (2) air filter isn't clogged; (3) pilot light or igniter is working; (4) gas supply valve is open. If none of these fix it, call us — it could be a failed heat exchanger or control board.

Well-maintained gas furnaces typically last 15–20 years. Signs you're approaching the end of your furnace's life include increasing repair frequency, rising energy bills, uneven heating, and unusual noises. If your furnace is 15+ years old and needs a major repair, replacement is often the smarter choice.

In Northern Virginia's climate, both are excellent options. Heat pumps are more energy-efficient for moderate temperatures and provide both heating and cooling. Furnaces are more powerful for very cold days. Many homeowners opt for a dual-fuel system (heat pump + gas furnace backup) for maximum efficiency and reliability. Call us to discuss the best option for your home.

For standard 1-inch filters: every 1–3 months. With pets, allergies, or a dusty environment: every 30 days. Thicker 4–5 inch media filters can last 6–12 months. A clogged filter is the single most common cause of HVAC problems and costly repairs — don't skip this simple step.

A maintenance plan is one of the best investments you can make for your HVAC system. Regular tune-ups catch small issues early, keep your warranty valid, improve energy efficiency by up to 15%, and extend your system's lifespan by years. Ask us about our maintenance agreements.

Generally, no. Modern outdoor units are built to withstand the elements. Covering them can trap moisture and attract pests. However, if you have a heat pump, never cover it — it runs year-round. If you're concerned about debris, a top cover only (not sides) is acceptable.

Yes! We offer true 24/7 emergency service, 365 days a year — including holidays. When your system breaks down at 2am in the middle of winter, call (703) 347-2616 and a real person will answer and dispatch a technician to your home.

First, check: (1) thermostat settings and batteries; (2) circuit breaker — reset if tripped; (3) air filter — replace if dirty; (4) outdoor unit power switch. If none of these solve it, call us at (703) 347-2616. We'll diagnose the issue and get you back to comfort fast.