Serving Green Bay, WI & nearby Open 7 days · Mon–Fri 7AM–8PM Licensed & insured · 90-day warranty (844) 442-1999
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Serving Green Bay, WI

Tankless Water Heater Repair in Green Bay, WI

A tankless water heater that is acting up rarely fixes itself. Call us for tankless water heater repair in Green Bay, WI and a technician will diagnose it, quote the fix before starting and use parts matched to your model.

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  • Upfront quote before work
  • 90-day parts & labor warranty
  • Parts matched to your model
  • Same-day service when available

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(844) 442-1999
Licensed & insuredFully insured technicians
90-day warrantyOn parts and labor
Upfront pricingApprove the price first
248 appliance types426 brands serviced
Overview

How we repair your Tankless Water Heater

A tankless water heater fires a gas burner or electric elements only when a hot tap opens, heating water as it passes through a heat exchanger instead of storing it. A tankless water heater uses a gas burner or electric elements, thermostats or a control board, safety devices such as a pressure relief valve, and venting on gas units. A technician tests the heat source, controls and safety parts, and checks for scale, leaks and venting problems.

Tankless Water Heater repair at a glance

  • Typical repair cost$150–$600
  • Typical service life15–20 years
  • Warranty on repairs90 days parts & labor
  • QuoteUpfront, before work
  • Same-day visitsWhen available
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Diagnosis

Common Tankless Water Heater problems we fix

What usually causes each symptom, and what our technician checks to confirm it.

Fan noise or venting faults

Likely causes
A worn combustion fan motor, a blocked or disconnected vent pipe, or condensate backing up in a condensing model.
What our technician checks
Fan speed and vent pressure are measured, and the condensate trap and neutralizer are inspected.

Scale buildup and reduced output

Likely causes
Hard water leaving mineral deposits inside the heat exchanger, often shown as a scale warning code.
What our technician checks
Temperature rise is checked and the heat exchanger is descaled by circulating a descaling solution through the service valves.

Water not hot enough at high demand

Likely causes
Too many fixtures open for the unit capacity, undersized gas supply line, or scale reducing heat transfer.
What our technician checks
Gas pressure drop at full fire and outlet temperature at different flow rates are measured.

Unit does not turn on when tap opens

Likely causes
A failed flow sensor, a dirty inlet filter screen, very low flow from a fixture aerator, or no power to the control board.
What our technician checks
Flow sensor output is read while water runs, and power supply and fuses on the board are tested.

Unit shows an error code and will not fire

Likely causes
Ignition failure, low gas pressure, a blocked vent or intake, a failed flame rod, or a fault reported by the control board.
What our technician checks
The code is read, then gas pressure is measured under full fire and the igniter, flame rod and venting are tested.

Hot water turns cold mid-shower

Likely causes
Flow dropping below the activation rate, a clogged inlet filter, scale in the heat exchanger, or mixing at a faucet valve pulling cold water across.
What our technician checks
Flow rate is measured at the unit, the inlet screen is checked, and the heat exchanger temperature rise is compared with specification.
Before you call

Quick checks you can do safely

  • Check that the unit has power and the gas valve is open.
  • Note the error code shown on the display before calling.
  • Clean the cold water inlet filter screen after shutting off water.
  • Make sure the outdoor vent or intake is not blocked by snow, leaves or nests.
  • Try a single fixture at full flow to rule out a low-flow faucet.

Safety first: Gas tankless heaters involve gas and carbon monoxide venting, and a smell of gas means leaving the home and calling the gas utility.

Still not working?

Call and describe what you see and hear, plus any error code. It helps the technician bring the right parts on the first visit.

(844) 442-1999

Seeing a code? Try our error code lookup or troubleshooting wizard.

How it works

Our 5-step tankless water heater repair process

  1. Call or book onlineTell us the appliance, brand and what it is doing. We confirm a visit window that works for you.
  2. DiagnosisThe technician inspects and tests the tankless water heater to find the actual cause, not just the symptom.
  3. Upfront quoteYou get a clear price before any work starts. No surprise charges.
  4. RepairWe fix it with parts matched to your model, often on the same visit when the part is on the truck.
  5. Test and warrantyWe test the unit under normal operation, clean up and back the repair with a 90-day parts-and-labor warranty.
Pricing

Tankless Water Heater repair cost and lifespan

Typical repair cost$150–$600
Typical service life15–20 yrs

National ballpark estimates. Your exact price depends on the part and labor, and you get it upfront after diagnosis. On the fence? Try the repair vs replace calculator.

Parts we replace most often

  • Flow sensor
  • Igniter
  • Flame rod
  • Gas valve
  • Combustion fan motor
  • Control board
  • Heat exchanger

We match every part to your model and serial number.

Maintenance

Keep your Tankless Water Heater running longer

  • Check and clean the condensate trap on condensing units.
  • Inspect vent and intake terminations for blockage.
  • Install isolation service valves so descaling can be done easily.
  • Clean the inlet water filter screen.
  • Descale the heat exchanger once a year, more often with hard water.

Build a maintenance plan

Create a printable monthly, quarterly and yearly checklist for every appliance in your home.

Open the schedule generator
Local service

Tankless Water Heater repair in Green Bay, WI

Long, cold winters in Wisconsin mean dryers, ovens and water heaters in Green Bay carry a heavy load for months.

We provide tankless water heater repair throughout Green Bay, including ZIP codes 54301, 54302, 54303, 54304, 54305 and 54306 and more, and in nearby De Pere, Oneida and Suamico.

Hard water is common across much of Wisconsin; where it is, minerals build scale on heating elements, valves and spray parts, so descaling and filter changes matter more.

Also serving nearby

Brands

Tankless Water Heater brands we repair

FAQ

Frequently Asked Questions

How much does tankless water heater repair cost in Green Bay, WI?

Most tankless water heater repairs fall roughly between $150 and $600, depending on the part and labor involved. That is a national ballpark estimate; you get an exact quote after diagnosis and before any work starts.

Can you repair my tankless water heater the same day?

Often, yes. Call (844) 442-1999 early in the day and we will try to schedule a same-day visit. Same-day service depends on technician availability and whether the part is in stock.

Is the repair guaranteed?

Yes. Completed repairs are covered by a 90-day parts-and-labor warranty. If the same problem comes back in that time, we come back and fix it.

Which brands do you service?

We work on all major brands, including Bosch, EcoSmart, Marey, Navien, Noritz and Rheem.

Should I repair or replace my tankless water heater?

A typical tankless water heater lasts about 15 to 20 years. If yours is well within that range and the repair costs less than half the price of a new one, repair is usually the better value. Our technician will tell you honestly if replacement makes more sense.

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Get your tankless water heater fixed in Green Bay

Upfront quote before work starts · Parts matched to your model · 90-day warranty

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