Tankless Water Heater Repair in Mercer Island, WA
Need tankless water heater repair in Mercer Island, WA today? Ignition faults, flow sensors, scale and leaks are what we fix, on Rinnai, Navien, Noritz, Rheem, Takagi and other makes.
- Written quote before work
- Gas and electric units
- Rinnai, Navien, Noritz, Rheem, Takagi
Fault found first
The code, the stored history and each suspect part are tested before anything is ordered.
Price agreed in writing
Parts and labor go on a written quote, and nothing starts until you approve it.
Licensed local techs
Repairs by licensed technicians who work in your part of town.
Tankless units only
One specialty: gas and electric tankless heaters that stopped doing their job.
Tankless Units in Mercer Island Homes
In Mercer Island, units usually hang in the garage of a craftsman or newer house. The water is mostly soft, so faults tend to be parts, not scale.
What we run into in Mercer Island
- Garage installs. Many units here are mounted on a garage wall, which keeps them reachable for service and out of the worst weather.
- Freeze damage. Cold snaps do damage here when the power drops overnight. A frozen line or a cracked fitting under the unit is a repair we see after every deep freeze.
Mercer Island and its ZIP codes (98040) are all inside our service area.
Call (380) 273-8196What We Repair on Tankless Units in Mercer Island
Error codes & ignition
Code 11, E003, 111 and their cousins traced to the gas supply, igniter, flame rod or venting, then fixed.
Descaling & flushing
Scale dissolved out of the heat exchanger through the service valves, with valves added if the unit has none.
Flow sensors, filters & leaks
Temperature swings, low flow and drips under the cabinet traced to the sensor, filter or a failing seal.
How a Repair Visit Runs in Mercer Island
Seven checks, in this order, because a code on its own only says where to start looking.
- 01
Error history read
The code on the display and the unit's stored fault history are read before a single cover comes off.
- 02
Gas pressure under load
- 03
Flow and inlet filter
- 04
Ignition and flame
Igniter, flame rod and burner are inspected and tested. A dirty rod is cleaned; a dead one is replaced.
- 05
Venting and condensate
- 06
Sensors and board
The flow sensor, thermistors and control board are tested against the maker's published values.
- 07
Fixed, then run hard
Tankless Problems We Fix Around Mercer Island
When people phone about tankless water heater repair in Mercer Island, WA, it is nearly always one of these problems. Each has a short list of causes.
Code 11, E003 or 111
A unit that clicks without lighting has an ignition, gas or venting fault, and each is checked in turn.
Drip from the cabinet
Drips come from service valves, fittings, the relief valve, the condensate line or the heat exchanger itself.
Code 10 or E110
Venting codes mean the unit can't breathe: a blocked termination, a nest, snow or a vent run that's too long.
Hot, then cold, then hot
A short cold burst after the tap reopens is normal start-up. Swings during one shower point to low flow, scale or a failing flow sensor.
Shuts off mid-shower
Flow drops below what the unit needs to keep firing: a clogged filter, aerator or shower cartridge, or a sensor misreading.
Cold at one tap only
Usually a mixing valve or a cold-water crossover at that fixture, not the heater.
Can't tell which one you have? Read us the display and describe the water, and the likely fault comes back on the call.
Fix It or Retire It? Deciding in Mercer Island
Gas tankless units commonly last 20 years or more with flushing, so a single failed part rarely means a new heater. A failed exchanger outside its warranty, on a unit past 15 years, is where replacement starts to win.
Not sure which side of the line you are on? Call (380) 273-8196 with the brand, the age on the label and the code. You will hear whether a repair makes sense before anyone comes out.
Call (380) 273-8196Estimated Repair Costs in Mercer Island
Most tankless water heater repair in Mercer Island, WA lands between an estimated $150 and $800 for parts and labor. A heat exchanger is the outlier, estimated at $1,000 to $2,500.
Diagnosis & code check
- Flow, filter and venting checked
- Model and serial noted for warranty
- Vent terminations looked over
Repairs & descaling
- Unit run at full demand afterwards
- Isolation valves added for flushing
- Igniter, flame rod or sensor replaced
Heat exchanger & major parts
- Fan motor or blower replaced
- Leaking heat exchanger replaced
- Warranty part claimed where it applies
Why Mercer Island Homeowners Call Us
Quote in writing
The cause and the price are written down before work starts, whether the job is a filter or an exchanger.
Run hard before we go
The unit is pushed with several taps open and its outlet temperature watched before the visit ends.
Parts tested before they're bought
A flow sensor or flame rod gets checked against the maker's values, so you don't pay for a part that wasn't broken.
Need Tankless Water Heater Repair in Mercer Island, WA? Call Now
Cold showers rarely fix themselves. Most units are back to full heat after one part and one visit.
Where We Go in Mercer Island
Mercer Island and its ZIP codes (98040) are all inside our service area.
- 98040
Nearby Cities We Serve
Tankless Water Heater Repair in Mercer Island, WA: FAQs
Question not covered here?
Call and ask. Someone who repairs tankless units answers, and the phone quote is free.
Call (380) 273-8196How much does tankless water heater repair in Mercer Island, WA cost?
Most repairs cost an estimated $150 to $800, depending on the part. Descaling alone is estimated at $150 to $350, and a heat exchanger at $1,000 to $2,500. Freeze repairs depend on what split, and are priced once the damage is seen.
Why is my tankless water heater not turning on?
Check for power at the outlet and that the gas valve is open. Beyond that it is usually low flow, a clogged inlet filter, a failed flow sensor or an ignition fault.
Can a tankless water heater be repaired?
Yes, in most cases. Igniters, flame rods, flow sensors, thermistors, fans, gas valves and boards are all replaceable, and scale can be descaled. A leaking heat exchanger on an old unit is the main exception.
How often should a tankless water heater be flushed?
Most makers call for a flush every year, and every six months on very hard water. On very soft water the gap can be longer, but skipping it for years invites scale faults.
Schedule a Tankless Visit in Mercer Island
Ring (380) 273-8196 with the brand and the code, and you will hear the probable fault and a price range before you hang up.