Tankless water heater service in Saratoga Springs, UT covers the install of an on-demand heater, the repair of gas and electric units when they fail and the yearly flush that clears mineral scale from the heat exchanger. A tankless unit heats water as it flows, so it has no tank to leak, but its burner, sensors and heat exchanger need clean water and clean airflow. Our 24/7 dispatch takes calls for a unit that has stopped,.
When the water is lukewarm, cold in bursts or showing a code
People rarely call about a tankless unit by name. They call because the shower runs warm instead of hot, or turns cold for a few seconds in the middle, or the display shows a number they cannot decode. Each symptom has a short list of causes.
| What you notice | Likely cause | What to do |
|---|---|---|
| Lukewarm water at every tap | Scale on the heat exchanger, a partly clogged inlet filter or a unit running at its flow limit | Clean the filter, then book a flush |
| Hot, then cold, then hot (cold sandwich) | Water left in the pipes between uses or a unit that cycles on and off at low flow | Check the minimum flow, ask about a recirculation setup |
| Error code on the display | Flame, ignition, vent, flow or sensor fault depending on the number | Write down the code and model, then call |
| No hot water and the unit is silent | Power or gas supply interrupted, tripped breaker or closed gas valve | Check power and gas valve, then call |
| Rumbling or popping from the unit | Scale boiling in the heat exchanger | Flush and review water quality |
| Water leaking from the unit | Failed connection, internal leak or condensate line problem | Shut off water to the unit and call |
Codes mean different things on different brands. Use the manual or call with the model number.
Symptoms to check before you book
Signs your tankless unit needs service
- Hot water that never gets quite hot enough
- A display code, with or without a beep
- Hot water that cuts out mid-shower
- Scale flakes in an aerator or inlet screen
- A unit more than a year past its last flush
Flush and descale: how, why and when
Scale is the main cause of tankless trouble. Dissolved minerals in the water leave a crust inside the heat exchanger when water is heated, and the crust narrows the passages and slows heat transfer. The unit then works harder and sometimes shuts off on a high temperature fault.
A flush runs a descaling solution, typically a mild acid, through the unit using a small pump and hoses connected to its service valves. The steps below show what we do on a typical visit.
- Shut offWe turn off power or gas and close the water supply to the unit.
- ConnectHoses and a small pump attach to the isolation valves on the cold and hot sides.
- CirculateDescaling solution runs through the heat exchanger for the time the manufacturer lists.
- RinseWe flush clean water through, clean the inlet filter and check the water flow.
- Restart and testWe reopen the valves, restart the unit and check temperature and codes.
How often depends on your water and your model, so follow the manufacturer's schedule. Units without isolation valves can still be flushed, but valves make the job easier. We can add them during a visit.
Ask your utility about hardness and test your tap
The City of Saratoga Springs 2024 drinking water report lists total dissolved solids from 144 to 672 ppm. That range is wide, and it is not the same as hardness. The report lists no hardness value. Scale depends on hardness, so total dissolved solids alone do not tell you how fast it builds.
Ask your water utility for its annual water quality report, and test your tap with a hardness kit. USGS classes run from soft up to very hard above 180 mg/L as calcium carbonate. A harder tap means more frequent flushing, and a conditioner or softener may be worth discussing. See our water softener and filtration page.
Need a plumber right now?
The 24/7 line is open. A dispatcher will book a licensed plumber.
Installing a tankless water heater
A tankless install is bigger than a tank swap. The unit needs the right gas line size or electrical capacity, a vent that can carry exhaust outside, a condensate drain for high-efficiency models and room on the wall. Isolation valves go on the water connections so the unit can be flushed later.
We check these before quoting, and permit rules vary by job, so ask the Saratoga Springs building department before work starts. If your tank is leaking right now, water heater replacement covers the faster options.
Repairing a tankless unit
Common repairs include cleaning the inlet filter, replacing a flame sensor or igniter on gas models, replacing a flow or temperature sensor, clearing a blocked condensate line and replacing a control board. We read the code, test the part and confirm the repair with a heat test.
If the heat exchanger is cracked or badly scaled, a repair may cost close to a new unit. We tell you early, before the work grows.
When tankless is not the answer
A tankless heater will not fix weak water pressure, and it will not give unlimited hot water if three fixtures run at once on a small unit. In very hard water without a plan for flushing, it can fail early. A tank or a hybrid unit may suit some homes better. See water heater installation for the full set of options.
What affects the price of tankless service
Visit type
A flush is a different job from a repair or a new install.
Brand and model
Parts and procedures differ between brands.
Isolation valves
If your unit lacks service valves, adding them is part of a first flush.
Access and venting
Wall height, vent run and location change time.
Scale condition
A neglected unit may need more than one pass.
A note on insurance
Homeowners insurance does not cover normal wear, scale or planned maintenance. Check whether a manufacturer or extended warranty covers parts.
Want your real number? Call (385) 488-1892 with the brand, model and what you see.
Tankless service across the Saratoga Springs area
We cover Saratoga Springs and nearby Lehi and Eagle Mountain. A unit that has stopped gets the 24/7 line, and a flush can be booked at a time that suits you.
Frequently asked questions
Follow the manufacturer's schedule. Harder water calls for more frequent flushing. Because the City report lists no hardness value, test your tap and ask your water utility.
The usual causes are scale on the heat exchanger, a clogged inlet filter, a flow rate above what the unit can heat or a sensor fault. A flush often solves it.
It is a short burst of cold water between two hot ones. It happens when the unit stops and restarts or when cooled water in the pipe reaches the tap. Minimum flow settings and recirculation can help.
Usually yes. Give us the brand, code and model number. The code narrows the part and the plumber brings it.
Yes. We check gas line size or electrical capacity, venting and drain before quoting.
Not always. Test your tap first. If the water is hard, a softener or conditioner can reduce scale, but it is a separate decision.
Still unsure? Call (385) 488-1892
Sources and references
Local facts on this page come from public pages like these. The city lists the 2021 International Plumbing Code (IPC) as adopted, and permit rules vary by job, so ask the Saratoga Springs building department before work starts. Page last reviewed 2026-10-15.