Boiler Repair in Wheaton, Maryland

Why people here call us.

Wheaton is forced-air country. The Cape Cods, ramblers and split-levels that make up most of 20902 and 20906 were built or converted to ducted gas heat, and that is what we see on most winter calls. But hydronic heat is here, in three places in particular: the older pre-war houses along and behind Georgia Ave that predate the postwar build-out, a scattering of 1950s ranches and additions that were done in baseboard rather than duct, and multi-family buildings where a central boiler serves the whole property.

Those homeowners have a specific problem, which is that a system nobody in the neighborhood has means fewer people who are comfortable working on it. Parts take longer to source, and a technician who mostly sees furnaces will often reach for the wrong explanation. A cold radiator at the end of a loop is not the same fault as a boiler that will not fire, and neither is the same as a system that fires constantly and never satisfies.

We work on boilers across Montgomery and Prince George's County from an office a short run east along University Blvd, and on a Wheaton hydronic call the first job is telling those three apart.

What Wheaton homes ask of this job.

The pre-war houses in Wheaton tend to have cast iron radiators fed by a gas-converted boiler in the basement, with piping that has been added to and rerouted through decades of finished basements and additions. Air gets trapped at the high points, circulators wear out, and zone valves stick partly open or partly shut so one part of the house is always wrong.

The 1950s baseboard installations, which turn up around Wheaton Forest, Glenmont and in additions through Kemp Mill and Forest Estates, are simpler but suffer from fin tube packed with dust and pet hair behind the covers, which quietly halves the output of a loop before anything mechanical has failed. In both cases the expansion tank is the component most often past its life and least often looked at, and a waterlogged tank shows up as a relief valve that weeps every time the system heats up.

Venting matters here for the same reason it does on Wheaton furnaces: an older boiler sharing a masonry chimney with a water heater, or left on an oversized flue after the water heater changed, is a draft problem worth testing rather than assuming. Washington Gas supplies the gas and Pepco the electricity. One practical consequence of hydronic heat: there is no duct, so cooling in these houses is a separate system entirely, usually a high-velocity install or ductless heads.

The problems that keep coming up.

1. Circulator pumps seized or running with failed bearings, so the boiler fires, the near-boiler piping gets hot and the radiators at the far end of the loop stay cold.
2. Zone valves stuck part open on multi-zone systems, which heats a section of the house that is not calling and leaves the section that is calling behind all winter.
3. Waterlogged expansion tanks pushing system pressure up as the water heats, so the relief valve weeps every cycle and the homeowner keeps topping the system up.
4. Air trapped at the high points of piping rerouted around finished basements and additions, giving cold radiators and gurgling that no amount of thermostat adjustment fixes.
5. Baseboard fin tube packed with dust and pet hair behind the covers, cutting a loop's output well before any component has actually failed.

How the appointment runs.

A Wheaton boiler visit starts with the numbers the system is already showing you: pressure and temperature at the gauge, the setting on the aquastat, whether the expansion tank has any air charge left, and whether the circulator is actually moving water rather than just running. Then we follow the complaint. A cold zone gets its valve, its thermostat and its circulator checked as one circuit before anyone talks about the boiler.

A boiler that will not fire gets the ignition sequence traced step by step, the same way a furnace does. We check the near-boiler piping, the relief valve and discharge, and we test draft and read carbon monoxide on anything venting into a chimney rather than assuming it is fine. Where a part is uncommon we tell you the sourcing timeline honestly rather than promising same-day.

You get the cause and the price before work begins, and emergency service runs 24 hours, which on a no-heat boiler call in January is the whole point.

Read the full boiler repair & replacement page →

Working in Wheaton.

We keep boiler work in-house rather than sending it out, which is not universal in an area this heavily forced-air, and our office at 9737 Mount Pisgah Rd in Silver Spring is a short run east along University Blvd. Home Comfort Air Services has been family owned since 2014, founded by Yosef after years working as a service technician. We are NATE certified, an ACCA member, BBB accredited with an A+ rating and Carrier authorized, with 24-hour emergency service.

Hydronic heat rewards patience and punishes guessing, so we trace circuits rather than replace components in order of price. Military members and seniors get 10 percent off any HVAC repair. Maryland HVACR license MD70918.

More about our work across Wheaton →

Common questions.