Boiler Repair & Maintenance in Woodstock, IL and Chicagoland — 24/7 Service

GSHA Services repairs and maintains gas boilers 24 hours a day — hot-water, steam, condensing and combi-boilers from Weil-McLain, Peerless, Navien, IBC, Carrier, Lennox, Burnham, Lochinvar, Bosch, Utica, Crown and every other brand. Our technicians carry circulator pumps, relief valves, expansion tanks, zone valves, ignitors, flame sensors and controls on the truck, so most boiler repairs are finished the same day with a written, upfront price. Annual boiler tune-ups are included in the GSHA PROTECT membership from $9/month.

At a glance
Hours24/7 emergency boiler repair — nights, weekends, holidays
BrandsAll makes: Weil-McLain, Peerless, Navien, IBC, Carrier, Lennox, Burnham, Lochinvar, Bosch, Utica, Crown, Slant/Fin, Pennco
SystemsHot-water baseboard & radiators, radiant floor, steam, combi, hydro-air, indirect water heaters
PricingDiagnostic visit, then a flat written repair price you approve before work starts
Tune-upAnnual boiler tune-up with combustion analysis; included for GSHA PROTECT members
SafetyCombustion and CO testing, relief valve and low-water cutoff test on every visit
Boiler down? We can be there today.
24/7 dispatch from Woodstock and Lake Bluff. Call now or book online.

Boiler problems we fix

What you noticeLikely causeTypical repair price
No heat, boiler will not fireIgnitor, flame sensor or thermocouple, gas valve, aquastat, low-water cutoff, tripped rollout or blocked vent switch$150 – $900
Boiler fires but some rooms stay coldAir in the system, failed circulator or zone valve, stuck zone valve motor, thermostat$150 (purge) – $850 (circulator)
Water dripping from the relief valveWaterlogged expansion tank, failed fill valve, relief valve itself$220 – $650
Banging, gurgling or kettlingAir in the lines, scale on the heat exchanger, incorrect steam piping, water hammer$150 – $700
Pressure too high or too lowPressure-reducing valve, expansion tank, leak somewhere in the system$200 – $600
Condensing boiler error code / lockoutBlocked condensate trap, dirty burner or flame rod, venting, low gas pressure, sensor faults$180 – $900
Steam boiler surging or losing waterDirty water, failed auto-feeder, leaking return, bad main vents$200 – $1,200
Leaking boiler section or heat exchangerCracked cast-iron section or condensing heat exchangerUsually time to replace the boiler

Ranges reflect typical GSHA jobs, parts and labor; your exact price is quoted in writing on site. Manufacturer parts warranties apply where in force.

What to check before you call

  • Thermostat set to Heat and above room temperature; batteries fresh.
  • Boiler power switch on and breaker not tripped; gas shut-off open.
  • Pressure gauge on a hot-water boiler reads roughly 12–20 psi when cold; a steam boiler’s sight glass shows water about half-way.
  • Condensing boilers: PVC intake and exhaust outside clear of snow, ice and leaves; no water pooled in the condensate trap area.
  • If you smell gas or a CO alarm sounds: leave the house, call 911 or Nicor Gas at 888-642-6748, then call us. Do not restart the boiler.

Annual boiler tune-up — what we do

A boiler tune-up is a combustion test, safety check and cleaning that takes about 60–90 minutes and prevents most winter failures. It is required annually by most manufacturers to keep the warranty in force, and it is included for GSHA PROTECT members.

Combustion & safety

  • Combustion analysis (CO, O2, efficiency) and gas pressure set to spec
  • Inspect and clean burners, pilot/ignitor and flame sensor
  • Inspect heat exchanger, flue, draft hood and venting; check chimney or PVC terminations
  • Test relief valve, high-limit, low-water cutoff, rollout and vent safety switches
  • Gas leak test; CO test in the boiler room

Hydronic system

  • Check system pressure, fill valve and expansion tank charge
  • Purge air; test circulators, zone valves and flow checks
  • Inspect for leaks at boiler sections, piping and radiators
  • Verify outdoor-reset settings and aquastat / control settings
  • Condensing boilers: clean condensate trap, check neutralizer, inspect heat exchanger
  • Steam: skim if needed, check auto-feeder, main vents and water level

Tune-up pricing: GSHA PROTECT members from $9/month with the boiler tune-up included, priority scheduling and repair discounts. Call (224) 220-3660 for one-time tune-up pricing and combined boiler-plus-water-heater visits.

Repair or replace your boiler?

Cast-iron boilers last 25–35 years and condensing boilers 15–20, so many repairs are worth doing. Replacement makes more sense when a section or heat exchanger is leaking, the repair is more than a third of the price of a new boiler, or the boiler is 25+ years old and you are paying for 65–75% efficiency. See boiler installation prices — 2026 Nicor rebates pay $350–$500 toward a 95% boiler or combi.

Why GSHA for boiler repair?

  • Hydronic and steam specialists who work on 100-year-old radiator systems and modern condensing boilers every week.
  • 24/7 dispatch from Woodstock and Lake Bluff; stocked trucks for one-visit repairs.
  • Upfront flat-rate pricing approved by you before work starts.
  • Combustion analyzer on every visit — we do not guess at gas pressure or CO.
  • Family-owned, BBB Accredited since 2015, licensed, bonded and insured.

Frequently asked questions

Do you offer 24-hour emergency boiler repair?
Yes. GSHA Services answers 24/7 and dispatches no-heat boiler calls first across McHenry, Lake, Kane, Cook and DuPage counties and southern Wisconsin.
How much does boiler repair cost?
After a diagnostic visit you receive a flat written price. Typical repairs run $150–$400 for purging air, relief valves, ignitors and flame sensors; $400–$900 for circulators, zone valves, expansion tanks and gas valves; and $700–$1,500 for control boards, auto-feeders and major steam piping corrections, parts and labor included.
How often should a boiler be serviced?
Once a year, ideally in late summer or early fall. Condensing and combi-boilers in particular need the condensate trap cleaned and the burner inspected annually, and most manufacturers require documented service to keep the warranty valid.
Why is my boiler leaking water from the relief valve?
Most often the expansion tank is waterlogged, so system pressure climbs when the boiler heats and the relief valve opens at 30 psi. Less often the fill valve is stuck or the relief valve itself is worn. Both are quick repairs; ignoring them can flood the boiler room.
Why do some radiators stay cold?
Air trapped in the loop, a failed circulator or zone valve, a closed balancing valve, or on steam systems a clogged air vent. We purge, test each zone and replace what has failed.
What brands of boilers do you service?
All of them: Weil-McLain, Peerless, Navien, IBC, Carrier, Bryant, Lennox, Burnham, Lochinvar, Bosch, Buderus, Utica, Crown, Slant/Fin, Pennco, Laars, Triangle Tube, HTP, NTI and older brands.
Is a boiler tune-up included in GSHA PROTECT?
Yes. GSHA PROTECT memberships from $9/month cover the annual tune-up for one heating system (boiler or furnace), with priority scheduling, repair discounts and an extended warranty on new equipment. Additional systems can be added.
Need boiler repair or a tune-up?
Call (224) 220-3660 or book online. Serving Woodstock, Crystal Lake, McHenry, Lake Bluff, Libertyville, Barrington and all of Chicagoland.

Last updated September 16, 2026 by the GSHA Services team. Repair price ranges are typical for GSHA jobs; your exact price is quoted in writing on site before work begins.