Emergency Boiler Repair in Wilmington, DE

Call the emergency line right away for: no heat with temperatures near or below freezing (pipes freeze fast in unheated rowhouses and crawlspaces); the smell of gas near the boiler — but call the gas utility or 911 first, then us; active water damage from the boiler or its piping, such as a burst section or a flooded basement; and a carbon monoxide alarm sounding — get out, then call emergency services. In Delaware’s humid mid-Atlantic winters, the cold snaps that kill boilers are the same ones that burst pipes, so a dead boiler at 2 AM on a 15-degree night is exactly what the 24/7 line exists for.

What is not an emergency: a boiler that works but runs oddly (that is a diagnosis job), a slow pressure drop you have been topping up for weeks, or a single cold radiator. Those ask about actual appointment availability on the call — but they do not jump the no-heat queue.

• Thermostat — set to heat, setpoint above room temp, fresh batteries if it takes them
• Power — the boiler’s emergency switch and breaker; a tripped breaker tells the pro something
• Pressure gauge — on sealed systems, near-zero pressure points at the leak and pressure family; read the number aloud on the call
• Fuel — gas: is the gas valve on? Oil: check the tank gauge first — an empty tank is a delivery problem, not a burner problem
• Error display — if the unit shows a code or flashing light, read exactly what it says; do not clear it first
• Water on the floor — if there is active leaking, shut the boiler’s water feed and kill power; if it is just dampness, note where

None of this delays help — it makes the triage faster and the visit shorter, because the pro arrives knowing the fuel type, the symptom, and what you already ruled out.

Do not keep resetting an oil burner. Every reset floods the chamber with unburned fuel; after two or three failed starts, stop — the next call is to us. Do not bypass or tape over safety switches — rollout switches, pressure switches, and spill switches exist because boilers can hurt people. Do not use the oven or a space heater as overnight heat in a closed room — especially with older atmospheric units, that trades one risk for another. And if you smell gas, do not flip switches, do not call from inside the house, and do not wait for the boiler company first — the utility’s emergency line and 911 come first; our emergency service comes after the gas is cleared.

Priority one is restoring heat safely: testing ignition and flame, checking fuel supply, getting pressure back into a healthy 12–15 psi cold range on sealed systems, and stopping active leaks. Full diagnosis of underlying causes — the sooted exchanger, the failing expansion tank, the condensate drain that will freeze again — follows once the house is warm. If the unit cannot be saved on the spot, the pro tells you plainly and the replacement page covers what comes next. The how it works page explains the connection process; downtown Wilmington rowhouses with tight basement access should mention the access situation on the call so the pro arrives prepared.