Heat Pump Services in the Greater Fairfax Area
Need fast, reliable heat pump help today? We service and replace heat pumps with upfront pricing and no surprises. Our certified, in-house technicians deliver careful work and clear options. Serving the Greater Fairfax area, including Alexandria, Arlington, and Reston. Backed by a 4.9 rating from 1,111 reviews and a customer-first guarantee. Schedule online or contact us for same-day service.
Why Choose Us
Certified technicians
Upfront, honest pricing
Trusted by homeowners
Licensed and insured
Fast, same-day service
What Our Customers Say
quality
“Cardinal installed and has serviced our townhouse's heat pump for many years. Their techs are a good bunch.”
expertise
“Sergii did an awesome job troubleshooting the heat pump. Very pleased with his expertise.”
honesty
“They are an honest company and do not try to upsell you.”
A heat pump not reaching the set temperature usually means its heating capacity is reduced by cold outdoor weather, airflow blockages, low refrigerant, or thermostat/aux heat settings. The most common everyday cause is restricted airflow from a dirty filter or a snow‑covered outdoor unit, which makes the system run but deliver only lukewarm air. In very low temperatures, a heat pump may need its auxiliary heat; if that backup doesn’t engage, rooms stay below the setpoint. Short defrost cycles are normal, but frequent or extended defrost can signal a deeper issue. Our in-house technicians service these problems across Northern Virginia, including the Haymarket area. For urgent outages, Cardinal Plumbing Heating & Air offers same-day and 24/7 emergency HVAC service.
Check these signals to decide next steps:
- Outdoor unit iced over after a defrost cycle completes
- Supply air stays barely warm after 10+ minutes of heating
- Thermostat shows AUX constantly or breakers trip
- Outdoor fan not spinning while the unit hums
Replace a clogged filter, clear snow from the outdoor unit, and verify Heat mode with fan on Auto before calling.
Updated: 2026-06-16
Need help in Haymarket, VA? Call (703) 653-0701 or book online.
Still have questions?
Have questions or need service? Contact our team today to discuss your needs, request a quote, or schedule an appointment.