
Tankless Water Heater Repair in Prior Lake, MN
Tankless water heater repair in Prior Lake, MN for units that flash a code, run lukewarm or quit halfway through a shower. Each suspect part is tested, then fixed at a price you agree first.
- Descaling through service valves
- Rinnai, Navien, Noritz, Rheem, Takagi
- Error history read first
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 Prior Lake Homes
Most Prior Lake homes keep the tankless in the basement, beside the furnace. Hard water and cold winters are what wear these units down.
What we run into in Prior Lake
- Basement units. In a basement install, a clogged condensate trap or a failed pump can shut the unit down with a code long before anyone sees water.
- Freeze damage. A hard freeze can split the pipes feeding a unit. Its built-in freeze protection only works while the unit still has power and gas.
- Hard water. With water this hard, a unit that has never been flushed is usually running hot inside and cold at the tap. Descaling is often half of the cure.
Prior Lake and its ZIP codes (55372) are all inside our service area.
Call (380) 273-8196Tankless Problems We Fix Around Prior Lake
The list below covers what we find on most visits for tankless water heater repair in Prior Lake, MN, from ignition codes to drips under the cabinet.

Unit won't light
No ignition usually means gas pressure, a worn igniter, a dirty flame rod or a blocked vent. Each is tested.

Water under the unit
Drips come from service valves, fittings, the relief valve, the condensate line or the heat exchanger itself.

Code 10 or E110
An air or exhaust code stops the burner for safety. The intake and exhaust are cleared and checked.
Noisy or whistling
Scale, a struggling fan or a gas regulator issue, each of which shows up on testing.
Error code keeps coming back
A reset only clears the symptom. Repeated ignition or exhaust codes need a visit.
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.
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 Prior Lake
Most tankless faults are repairs, plain and simple. Replacement only makes sense when the heat exchanger has failed out of warranty or an electric unit is near the end of its shorter working life.
Tell us the brand, roughly how old the unit is and what it is doing when you call (380) 273-8196. If a repair is a poor spend, you will be told so.
Call (380) 273-8196Estimated Repair Costs in Prior Lake
A typical bill for tankless water heater repair in Prior Lake, MN is estimated at $150 to $800. These are estimates, not quotes, and an exchanger replacement sits higher at an estimated $1,000 to $2,500.
Diagnosis & code check
- Vent terminations looked over
- Gas pressure measured under load
- Flow, filter and venting checked
Repairs & descaling
- Isolation valves added for flushing
- Unit run at full demand afterwards
- Igniter, flame rod or sensor replaced
Heat exchanger & major parts
- Combustion checked after the swap
- Leaking heat exchanger replaced
- Control board or gas valve replaced
Need Tankless Water Heater Repair in Prior Lake, MN? Call Us Now
The sooner a fault is tested, the more likely it is a small part and not a big one.
Prior Lake Homes by the Numbers
Gas heats about 84% of homes in Prior Lake, so gas tankless units, with their vent runs and gas-line sizing, are the usual case on a call. The median home here dates from 1997, so tankless units are a mix of original-era installs and newer replacements, and an older unit that has never been descaled is a frequent find. Owners live in about 86% of Prior Lake homes (single-family about 88%), so the person who calls is usually the person who decides.
Prior Lake covers about 16 square miles and holds roughly 27,832 residents, around 1,709 per square mile: spread out, with mostly detached homes on larger lots and longer runs between fixtures and the street. It is number 13 by population of the 96 Minnesota places on our service list.
Source: U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates for Prior Lake, MN.
Where We Go in Prior Lake
Prior Lake and its ZIP codes (55372) are all inside our service area.
- 55372
Nearby Cities We Serve
Tankless Water Heater Repair in Prior Lake, MN: 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 Prior Lake, MN 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. On hard water, a descale often goes with the repair and sits on the same written quote.
Why is my tankless water heater not turning on?
First confirm power and gas. If both are there, the usual causes are low flow, a dirty inlet filter, a bad flow sensor or an ignition fault.
Is there a reset button on a tankless water heater?
Most units reset by switching power off and on, or through the controller. A reset clears the code, not the cause; ignition and exhaust codes that return need a repair visit.
Can a tankless water heater be repaired?
Usually, yes. Nearly every part on a tankless unit can be replaced, and a scaled exchanger can be cleaned. The exception is an old unit whose heat exchanger has started to leak.

Book Your Prior Lake Repair Visit
(380) 273-8196 reaches someone who works on tankless units every day. Describe the problem and pick a time.