Gas Furnace Repair, Tune-Up & Installation

A gas furnace is the most common way to heat a home across Washington, D.C. and Maryland — and when it quits on the coldest night of the year, you want a team that can diagnose it fast and fix it right. Our NATE-certified technicians repair, maintain and install every make and model.

All-Pro Services has worked on gas furnaces for more than 40 years, and we’re a factory-authorized dealer for Lennox, Trane, American Standard, Rheem, Ruud, Bryant, Carrier and York. Whether your furnace needs a quick repair, a seasonal safety check, or a full high-efficiency replacement, we’ll give you a straight answer and get your home warm again.

Gas furnace services we provide

Furnace Repair

Fast, honest diagnosis when your furnace won’t start, won’t keep up, or is making a noise it shouldn’t.

Furnace Tune-Up

A full safety and performance inspection — including burner, ignition and flue/vent checks — before the cold sets in.

Furnace Installation

Right-sized, high-efficiency furnaces expertly installed to last, with a free estimate up front.

Common gas furnace problems we fix

Most no-heat calls trace back to a handful of causes, and many are straightforward repairs rather than a reason to replace:

Furnace won’t ignite — a failed igniter, flame sensor, or a problem in the ignition control is one of the most common no-heat causes.
Blowing cold air — often a thermostat setting, an oversized temperature swing, or a furnace short-cycling on a safety limit.
Short cycling — turning on and off too frequently, usually from a clogged filter, airflow restriction, or an overheating limit switch.
Strange noises — banging, screeching or rumbling can point to ignition delay, a blower or bearing issue, or a part working loose.
Yellow or flickering burner flame — a sign of incomplete combustion that should be inspected promptly for safety.

Furnace safety: heat exchangers and carbon monoxide

A gas furnace burns fuel, so safety is part of every visit. The heat exchanger is the component that keeps combustion gases separate from the air you breathe; a cracked heat exchanger can let carbon monoxide into the home, which is why our tune-ups include a combustion and flue inspection. If you don’t already have working carbon monoxide alarms near your sleeping areas, add them — they’re the most important backstop in any home with gas appliances.

Repair or replace your gas furnace?

Furnaces typically last 15–20 years with maintenance. As a rule of thumb, if your furnace is past that range and facing a major repair, a high-efficiency replacement usually pays back in lower gas bills. Efficiency is measured in AFUE (Annual Fuel Utilization Efficiency) — older furnaces often run around 80% AFUE, while modern high-efficiency models reach 95% or more, meaning far less of your fuel dollar goes up the flue. We’ll size the replacement to your home as it actually is today and give you an honest repair-versus-replace comparison — never a hard sell.

Pairing a new furnace with one of our maintenance agreements keeps it running efficiently and protects it with priority service and 20% off repairs.

Gas furnace FAQs

How long does a gas furnace last?

With annual maintenance, most gas furnaces last 15–20 years. Past that, efficiency drops and parts get harder to source, so a major repair is often the moment to weigh replacement.

Why is my furnace blowing cold air?

Common causes include a thermostat set to “on” instead of “auto” (so the fan runs even between heating cycles), a clogged filter, or the furnace shutting down on a safety limit. If the basics check out, it’s worth a diagnostic visit — it’s usually a repair, not a replacement.

What AFUE efficiency should I look for in a new furnace?

Modern furnaces range from about 80% to 98% AFUE. High-efficiency models (90%+) cost more up front but use less gas every winter; we’ll help you weigh the payback for your home and how long you plan to stay.

Is a cracked heat exchanger dangerous?

It can be — a cracked heat exchanger can allow carbon monoxide to mix with your home’s air. It’s one of the things we inspect during a furnace tune-up, and it’s why working CO alarms are essential in any home with gas heat.

Do you service all furnace brands?

Yes — we repair and maintain all makes and models, and we’re a factory-authorized dealer for Lennox, Trane, American Standard, Rheem, Ruud, Bryant, Carrier and York for new installations.

Need furnace help in D.C. or Maryland? Request service online or call our local team. Not sure a furnace is the right system for your home? See our heating overview or compare with a heat pump. We proudly serve communities across D.C. and Maryland.