FURNACE REPAIR IN RESTON

TRUSTED HEATING REPAIRS IN RESTON & HERNDON SINCE 1975

A home that won’t stay warm or strange noises coming from your heating system can be signs of furnace trouble. Before assuming the worst, reach out to a trusted HVAC repair company. Many furnace issues can be quickly identified and repaired by a professional. Keep reading to learn more about furnace maintenance and repair solutions.

COMMON SIGNS OF FURNACE PROBLEMS

Heating systems can develop issues over time, and not all problems result in an immediate breakdown. Sometimes, the warning signs are subtle. If you notice any of these issues, it’s time to call an HVAC expert:

  • Persistent Odors – A temporary dust-burning smell is normal at the start of the season. However, if odors linger or worsen, it’s time for professional help.
  • Loud Noises – Banging, rattling, or other odd sounds may indicate internal issues. Schedule an inspection to prevent further damage. Call 571.346.3940 for expert furnace repair in Reston or Herndon.
  • Frequent Breakdowns – If you find yourself scheduling repairs often, your furnace may be wearing out. While maintenance is necessary, constant issues are a red flag.
  • Rising Heating Bills – If your energy costs keep climbing despite normal usage, your furnace may be working inefficiently. A professional inspection can determine if repairs or a replacement are needed.
  • Rust Buildup – Some rust is expected over time, but heavy corrosion on your furnace or vents can indicate dangerous venting problems. Addressing it quickly can prevent safety hazards.
  • Short Cycling –  If your furnace repeatedly turns on and off, an underlying malfunction is likely. Let our heating professionals diagnose and fix the issue.
  • Difficulty Starting – Difficulty starting your furnace or clicking noises may indicate an impending failure. Call Dave’s Heating and Air Conditioning or schedule a service online.


For expert furnace repair in Reston, Herndon, and Sterling, contact Dave’s Heating and Air Conditioning today.

TOP 5 CAUSES OF FURNACE FAILURE

Homeowners can avoid unnecessary repairs by understanding the most common furnace issues:

  • Dirty Filters – A blocked filter reduces airflow, forcing your furnace to work harder. Change it regularly for better efficiency.
  • Thermostat Malfunctions – If your furnace won’t turn on, check your thermostat settings and batteries. A faulty thermostat may need to be replaced.
  • Ignition Problems – A broken ignitor or pilot light means no heat. Call 571.346.3940 for professional service.
  • Exhaust Blower Failure – This component removes combustion gases. If it stops working, your furnace may cycle frequently or shut down completely. Regular inspections can help avoid this issue.
  • Blower Motor Malfunction – The blower motor circulates warm air throughout your home. If it fails due to overheating or dust buildup, your furnace will run but won’t distribute heat. Keeping your ducts clean and scheduling regular tune-ups can extend its life.
  • Heat Exchanger Damage – A cracked heat exchanger is a serious issue. It’s costly to replace, and excessive cycling can make the problem worse. Sometimes, a full furnace replacement is the better option.


At Dave’s Heating and Air Conditioning, we provide expert furnace repair and maintenance in Reston, Herndon, and Sterling. Call 571.346.3940 for service today.

YOUR TRUSTED HVAC EXPERTS IN RESTON & HERNDON

With nearly 50 years of experience, Dave’s Heating and Air Conditioning is the go-to choice for homeowners in Reston, Herndon, and Sterling. 

Our reputation is built on satisfied customers, top-rated service, and glowing reviews from those who trust us with their heating needs. Our transparent approach, quality service, and skilled technicians ensure that your furnace issues are resolved efficiently. Contact us today to schedule your repair.

Frequently Asked Furnace Repair Questions

WHY ISN’T MY FURNACE REACHING THE TEMPERATURE I SET?

A clogged filter or airflow issues are the usual suspects if your furnace isn’t reaching the desired temperature. Other possible causes include:

  • A faulty thermostat
  • Closed or blocked vents
  • Pilot light or flame sensor malfunctions
    If you’re having trouble, contact Dave’s Heating and Air Conditioning for expert help!
Cold air blowing from your furnace can be caused by an issue with your thermostat, heat exchanger, or another component. Let us take care of it for you.
The price of furnace repairs in Reston is determined by the type of repair needed. Basic fixes, like sensor replacements, typically start at $100, whereas major repairs, such as replacing a heat exchanger, can cost thousands. Most homeowners can expect to pay between $300 and $800 for standard repairs. Keeping up with routine maintenance helps prevent costly issues, particularly in aging systems.
Before calling, check that all vents are open and the thermostat settings are correct. If the issue persists, we’ll take care of it for you.
Strange furnace noises might indicate a mechanical issue or airflow blockage. Let our experts investigate and fix the problem.
If your furnace is making odd noises, not heating properly, or failing to meet your thermostat settings, it’s time to call us.
Water leakage is often caused by a clogged condensate drain or pump issues. Our team will quickly address the problem and prevent damage.
It’s possible to relight the pilot yourself, but if the issue keeps happening, it’s safer to have our team handle it.
A cracked heat exchanger can be a serious safety hazard. It can release carbon monoxide into your home. Call us immediately if you suspect a crack.
A stuck relay or thermostat malfunction could be causing your furnace to stay on. Our technicians will quickly fix the issue.
Cheap repairs might not last and could lead to more problems later. We offer fair, high-quality repairs that will save you money in the long run.
At Dave’s Heating and Air Conditioning, we service and repair all major furnace brands in Reston, including Lennox, Carrier, Trane, and Goodman. Our skilled technicians have the expertise to diagnose and fix issues for any make or model, ensuring reliable performance for your heating system.

A furnace that runs too loudly may be experiencing issues with fan speed, duct balance, or airflow obstructions. Try lowering the blower fan speed as a first step. If the noise doesn’t improve, call 571.346.3940 for expert service to adjust and fine-tune your system.

Furnace smells in Reston may stem from a few different sources. Burning dust at startup, mold or mildew in the system, and electrical burning odors due to a short circuit* are common culprits. A rotten egg smell is often a sign of a gas leak*, and grime in the heat exchanger can also create unpleasant odors. If you detect the smell of gas or burning, turn off your furnace right away and contact 571.346.3940 for urgent assistance.

Regular maintenance can help prevent issues and keep your furnace running longer. Schedule a tune-up to extend the life of your unit.
A furnace that turns on and off repeatedly may have a dirty flame sensor. To clean it, turn off the furnace’s power and gas supply. Find the flame sensor near the burner, remove it, and clean it using fine-grit sandpaper. Once cleaned, put the sensor back in place and restore power to the furnace. If you’re not comfortable performing this task, Dave’s Heating and Air Conditioning can help with the repair.
DIY furnace repairs can be dangerous. Trust our professionals to handle repairs safely and efficiently.