No heat in a Waltham winter, a lockout that will not clear, water where it should not be — call any time. The emergency telephone line is available 24/7 and true Explain urgent symptoms first.
General inquiries: 7 AM–7 PM · Emergency calls: 24/7 · (888) 766-1474
Five facts.
Emergency triage is only as good as your information. The five facts: 1) fuel type (gas or oil), 2) boiler age (or "very old"), 3) the symptom (error code, lockout pattern, leak), 4) building type and units affected, 5) service history. Thirty seconds of preparation saves thirty minutes of guesswork.
"I don't know anything" is also useful data — say it. The tech will figure out the rest on site.
The Waltham line.
For renters: a no-heat outage in your unit is your landlord's emergency too — notify in writing immediately and document temperatures. You cannot authorize boiler work yourself, but you can report precisely: which rooms, since when, and what the boiler is doing.
Useful minutes.
Gather the five facts the dispatcher needs: fuel type (gas or oil), boiler age (or "very old"), the symptom (error code, lockout pattern, leak), building type and units affected, and service history. Thirty seconds of preparation saves thirty minutes of guesswork — and "I don't know anything" is also useful data; say it.
Protect pipes while you wait: open sink cabinets on exterior walls, let taps drip — mill-building pipes in exterior masonry walls freeze first. If you burn oil, check the tank gauge. In a multi-unit building, alert the building contact or other units if common systems are involved. And do not keep resetting a locked-out burner: intermittent lockouts are progressive and do not self-heal.
The Waltham factor.
Waltham's converted mill and factory housing has masonry walls and exposed piping runs that lose heat fast. When the boiler quits in a mill conversion, the temperature drops quicker than in a wood-frame colonial — and the common-area piping (hallways, stairwells) is often the first to freeze. If you live in converted mill housing, say so on the call: it changes the urgency math.
Five minutes before you call.
If the gauge reads zero and will not hold, the visit starts with the leak hunt — our pressure guide explains what those readings mean. Bring your findings to the call: gas ignition faults and oil burner faults each have their own triage path in Waltham.
Straight answers before you call.
Document everything in writing — temperatures, times, your attempts to reach the landlord — and call (888) 766-1474 for triage advice on the heating itself; if there is still no response, contact Waltham inspectional services, which enforces the heat code. You cannot authorize the repair, but you can get a straight answer about what the symptom means. Do not stop paying rent without following legal process.
No heat in freezing weather, active water leaking from the boiler, any gas odor, or a burner that will not stay running — call the 24/7 line. Uneven heat or a new noise with the system still heating can usually wait. When unsure, describe the symptom; triage sorts it in a minute or two.
Multi-unit outages in freezing weather jump the queue — call (888) 766-1474 and say how many units are affected. First check the thermostat, the red emergency switch, and the breaker; then do not keep resetting a locked-out burner. You will get a straight timing answer on the call.
Do not flip switches or touch the boiler — leave the area and call the gas utility's emergency line from outside, then call us at (888) 766-1474. Gas odor skips triage and goes straight to emergency protocol. The utility makes it safe; we handle the boiler side after.
If water is reaching the burner or electrical controls, yes — shut the boiler down and call the 24/7 line. Old mill buildings along the Charles sit low, and water plus a boiler is a bad combination. Note whether the water is coming from the boiler itself or from outside; it changes the response.
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