A boiler that fires and quits, bangs, bleeds pressure, or locks out every few days is asking for testing, not new parts. This page translates the city’s most common complaints into their likely causes and what to check before you call — so the visit starts with useful information instead of guesses.
General inquiries: 7 AM–7 PM · Emergency calls: 24/7 · (888) 766-1474
Common complaints and their usual causes.
Every fault below is a pattern, not a promise — the visit confirms it. But arriving with the pattern named correctly is what turns a vague “it’s not working” into a diagnosis that lands on the first visit.
Burner, tank, and the corrosion pass.
Empty tanks and sludge-clogged filters end more oil calls than dead burners do. When the tank ran low, the pickup tube starts drinking sludge and water off the bottom — and the nozzle and filter pay for it. If the burner has locked out, press the red reset once and only once, then call; every reset dumps unburned fuel into the chamber.
Then comes the corrosion pass, which is standard on coastal oil calls. Above-ground tanks in basements and garages rust at the seams and legs in salt air; fill and vent pipes corrode where they meet the house wall; exposed fuel lines pit. A damp spot under the tank, rust flaking off a leg, or staining at a fitting is diagnostic information — mention it when you call. The oil boiler page goes deeper on burner, nozzle, and tank work.
Not every no-heat call is a broken boiler.
Nor’easters write their own service tickets in Beverly. Power goes out and the boiler goes dark with it — circulators, controls, and burners all need electricity. Wind packs snow against vent terminals until they choke, condensate drains freeze during the cold that follows the storm, and oil deliveries get delayed while tanks run low. None of these are boiler failures in the mechanical sense, but they all present as no heat.
The triage question after every storm is sequence: when did the power drop, when did it return, and what did the boiler do. Systems that restart cleanly need nothing. Systems that lock out, sit on a frozen condensate line, or ran the tank dry during a delivery delay need a visit. If your vent terminal is buried, clear the snow before calling — a choked vent is a lockout with a shovel for a fix, and the emergency page covers the full storm triage order.
Housing era predicts fault era.
Downtown and the waterfront — colonials, multi-families, captains’ homes — run cast-iron oil and atmospheric gas boilers, many past 25 years, with the occasional one-pipe steam survivor. Expect ignition components, nozzles and electrodes, cracked sections that weep, failed steam air vents, and radiators never balanced across three floors. Basements are tight and old: headroom, stair width, and access all matter, so describe the setup when you call.
Ryal Side, the Cove, and North Beverly — capes, ranches, split-levels — run sealed hot-water systems from the post-war decades onward, plus condensing units in the newest work. Expect condensate-drain freeze-ups after storms, pressure-loss complaints, failed expansion tanks, and sensor or control faults. These systems reward a technician who reads the error history instead of clearing it. The gas boiler page covers the gas-specific versions of these faults.
An order of operations, not a pile of parts.
A proper visit starts with the symptom history — when it started, what changed, what you’ve tried — then works through the system in order: fuel supply (gas pressure, or on oil, tank level, filter condition, and line integrity plus the corrosion pass); ignition and flame (sensors, igniters, electrodes, nozzle spray pattern on oil); water side (pressure against the 12–15 psi cold baseline, expansion tank charge, auto-fill valve function, air in the system); and distribution (zone valves, circulators, radiator balance). Skipping the order is how simple faults get expensive.
Expect findings explained before any work is authorized — what failed, why it failed, and what the options are. If the symptom language sounded familiar, the signs your boiler needs repair guide is worth a read before the visit.
Straight answers before you call.
Once. One press after a lockout is a legitimate restart attempt; repeated presses flood the combustion chamber with unburned fuel and turn a service call into a cleanup. If it trips again after a single reset, stop and call — the burner is telling you something is wrong, and the answer is diagnosis, not more resets.
Short-cycling like that usually points at flame-sensing or ignition on gas units, or a fuel-starved burner on oil — clogged nozzle, dirty filter, or a weak pump. On old downtown boilers it can also be a control or high-limit issue. Note the pattern (how long it fires, how often) and call; the pattern is half the diagnosis.
Not necessarily, but it means the tank needs eyes on it. Staining can come from condensation dripping off a rusting seam or leg — which is still a problem, because legs and seams are exactly where coastal tanks fail. Don’t wait for a drip you can see; mention the staining on the call so the visit includes a full tank check.
A buried vent terminal will usually shut the boiler down — modern units lock out rather than run with a choked vent, and older ones can spill exhaust. Clear the snow from around the terminal and the intake screen, then see if the unit restarts. If it stays locked out, call and mention the storm — the sequence matters.
Bleed it — trapped air is the most common cause and the cheapest fix. If it stays cold with the supply pipe hot, suspect a stuck valve or an unbalanced loop rather than the boiler. In three-floor colonials, a single cold radiator is almost always distribution, and the fix is at the radiator, not the burner.
Storms cause flame failures in a few ways: the outage dropped and restored power, which can lock out controls; wind-driven snow choked the vent or intake; or the condensate drain froze in the cold after the storm. Describe the storm sequence when you call — it tells the technician whether to start at the vent, the drain, or the controls.
Related services in the Beverly area.
When the fault is fuel-specific, the gas boiler page goes deeper on ignition, flame sensing, and condensate faults, while the oil boiler page covers burner and tank work for the city’s big oil minority. A dead unit on a freezing night belongs on the emergency page instead. If diagnosis shows the block is finished, the installation and replacement page covers sizing and fuel choice. Nationally, boiler leak and pressure repair and hot-water hydronic repair cover these fault families in general terms, and the Massachusetts hub lists the rest of the state’s coverage.
Call (888) 766-1474 — describe the symptom and get connected to a local pro for real diagnosis.
