A boiler that stops heating on a freezing night is a real emergency. Lodi Pro Plumbing repairs hot water heating boilers 24/7 in Lodi, NJ, and a no heat call in winter is treated as a same-day emergency. If you smell gas, leave the building and call the gas utility or 911 before calling us.
If there is no gas smell, check that the thermostat is calling for heat, the switch on the boiler is on and the pressure gauge reads in the normal range.
A boiler heats water and sends it through pipes to radiators, baseboard units or in-floor loops. It runs on gas or oil, and it is a closed loop that needs the right water pressure, working controls and a clean heat exchanger. Boiler repair finds which part of that system failed.
No heat or a leaking boiler? Call (973) 488-5410 and tell us the make and what the display shows.
Call (973) 488-5410Safety first with a gas boiler
Gas appliances carry risks that other repairs do not:
- A rotten egg smell means gas. Leave, do not touch switches and call the gas utility from outside.
- A carbon monoxide alarm that sounds means leave the house and call 911.
- Soot on the boiler or discolored walls near the flue are warning signs of poor combustion.
- A blocked flue or vent is a safety shutdown, and it should not be bypassed.
The plumber checks combustion, venting and gas pressure on every visit and will not leave a unit running that is unsafe.
What goes wrong with boilers
| Symptom | Likely cause | Usual fix |
|---|---|---|
| No heat, boiler off | Tripped limit, failed igniter or no gas | Reset, replace the igniter, check the supply |
| Boiler runs, house stays cold | Air in the system, a failed circulator pump or a closed valve | Bleed radiators, replace the pump |
| Banging or kettling noise | Scale on the heat exchanger | Flush and descale |
| Pressure too high or too low | Failed expansion tank or fill valve | Replace the tank or valve |
| Water around the boiler | Leaking valve, fitting or heat exchanger | Repair the fitting, or replace if the exchanger failed |
| Radiators cold at the top | Trapped air | Bleed the radiators |
A boiler that clicks but does not light often has a failed igniter or flame sensor. One that lights and shuts off after a few seconds often has a dirty sensor or a venting issue. Each has a different fix, and the plumber tests before replacing anything.
Lodi water and boiler scale
A boiler loop is filled with municipal water and topped up from time to time. The Passaic Valley Water Commission's 2026 report for Lodi lists hardness from 106 to 242 ppm at the Little Falls plant. Each time fresh hard water enters the loop, it can leave scale on the heat exchanger, and scale makes the boiler work harder, run noisier and fail sooner.
A closed loop that holds its water does not scale much. The danger is a loop that leaks and keeps taking in fresh water. If your boiler needs frequent top-ups, that is the sign to look for a leak, and the leak detection page explains how.
How we diagnose
- Ask about the symptoms, the age and the history of the unit.
- Check the thermostat, the power, the gas supply and the pressure.
- Watch the boiler through its start sequence and note the error code.
- Test the igniter, the sensor, the circulator and the controls.
- Check venting and combustion, and run the system until it heats.
- Explain the fault and the cost of repair against replacement.
Repair or replace
A repair on a sound boiler with a single fault is usually worth doing. A cracked heat exchanger, repeated failures or a unit that is far past its expected life points to replacement. A new boiler is a large investment, and the plumber explains what size and type fit your home before any quote. For hot water needs alone, see water heater installation.
What decides the cost of boiler repair
- Part
- Igniters and sensors are small. Circulator pumps, gas valves and heat exchangers cost more.
- Age and brand
- Parts for older or uncommon units can be hard to find.
- Access
- Boilers in tight utility spaces take longer to work on.
- Scale
- A unit with heavy scale may need a flush before repair can hold.
The plumber gives a clear price before work starts, along with an honest view of whether repair is worth it.
Keeping a boiler healthy
- Bleed radiators at the start of the heating season.
- Check the pressure gauge monthly in winter.
- Keep the area around the boiler clear and the vent unobstructed.
- Install a working carbon monoxide detector near sleeping areas.
- Have the unit looked at once a year before the heating season.
Boiler questions
Do you repair boilers at night or on weekends in Lodi?
Yes. The line is open 24/7. A boiler that gives no heat in winter is a same-day call, and the plumber gives a clear price before work starts.
Why does my boiler keep losing pressure?
A leak somewhere in the loop, a failed expansion tank or a bad fill valve. The plumber checks each, and a recurring loss means a leak to find.
Why are my radiators cold at the top?
Air is trapped. Bleeding the radiator releases it. If it returns, the system may have a leak or an air separator problem.
How often should a boiler be serviced?
Many makers recommend a yearly service before the heating season. Check your manual.
Can you work on oil boilers?
The plumber tells you on the call what we service. For fuel-specific work such as oil burners, we say honestly if another trade is needed.
Code basis. Plumbing work in New Jersey follows the state plumbing subcode, N.J.A.C. 5:23-3.15, which adopts the 2021 National Standard Plumbing Code. Ask which permits apply to your job and confirm with the Lodi Building Department.