For homeowners
We install and service tankless units in houses, condos, and townhomes. We size the unit to your bathrooms and appliances, then test every hot tap before we leave.
- No hot water
- Cold showers
- Error codes on display
Tankless water heater services Arlington Heights IL for endless hot water
When your old tank heater quits, we install and service tankless water heater services Arlington Heights IL homeowners rely on for endless hot water and lower gas bills. We size the unit to your fixtures, pull the permit, and test every connection before we leave.
Check gas pressureTest flow rateFlush heat exchanger- We test firstPressure and flow checked before work.
- We protect floorsDrop cloths and shoe covers used.
- We explain findingsYou see the readings and the plan.
- We clean upOld parts hauled away same day.
What our tankless water heater services include
Every job starts with a full assessment and ends with a tested, permitted installation. Here is what is covered in a standard tankless water heater service call. Add-ons like gas line upsizing or water softener installation are quoted separately before we begin.
Unit sizing and load calculation
We measure incoming water temperature, count your fixtures, and calculate peak flow demand. That tells us whether you need a 7 GPM or 11 GPM unit.
Permit and inspection coordination
We pull the plumbing permit from the Village of Arlington Heights and schedule the final inspection. You do not have to call anyone or fill out forms. We meet the inspector on site and correct anything they flag.
Gas line and venting work
Most tankless installs need a larger gas line and a new stainless steel vent. We run the gas line, install the vent, and seal the wall penetration. All work is pressure-tested and checked for leaks before we fire the unit.
Descaling and maintenance
For existing units, we flush the heat exchanger with a descaling solution and a recirculating pump. We clean the inlet filter, test the pressure relief valve, and check the anode rod. This service takes about 90 minutes.
Repair and parts replacement
We diagnose no-hot-water calls, error codes, and leaks. Common repairs include flow sensors, igniters, and mixing valves. Our trucks carry parts for Navien, Rheem, and AO Smith units so most repairs finish in one visit.
Homes and businesses.
The approach is the same for a home and a business. What changes is the access, the schedule and who needs the paperwork.
For businesses
We install and maintain commercial tankless systems for restaurants, salons, and multi-unit buildings. We work around your hours and keep a service log for each unit.
- Peak demand sizing
- Multi-unit buildings
- After-hours service
Tankless water heater services Arlington Heights IL
A plain-language look at what Tankless Water Heater Services involves and when it is needed.
See how it worksTankless water heater services Arlington Heights IL is the trade of installing, repairing, and maintaining on-demand water heaters that heat water only when a fixture calls for it. Instead of storing 40 to 50 gallons in a tank, a wall-mounted unit fires a gas burner or electric element the moment you open a hot tap. We mount the unit, run copper pipe or PEX tubing to the existing supply lines, and wire the controls.
Arlington Heights homes built before 1980 often have undersized gas lines and tight mechanical closets, so we run a pressure gauge and load calculation before recommending a unit. If you search for tankless water heater installation near me Arlington Heights IL, we handle the whole job: permit, gas line upgrade, venting, and final inspection. We also repair no-hot-water calls and perform tankless water heater descaling Arlington Heights 60004 to clear mineral scale.
A tankless unit heats water only when you open a tap, so sizing and maintenance decide how well it performs.
- What it is
- A wall-mounted water heater that heats water on demand instead of storing it in a tank.
- When you need it
- When your tank leaks, your family runs out of hot water, or you want lower gas bills.
- What to expect
- A load calculation, a permit, a four-to-six-hour install, and a full fixture test.
Our tankless water heater service process
Every job follows the same five steps, whether we are swapping a tank for a tankless unit or repairing a no-hot-water call. You get a clear timeline and a clean workspace.
-
Phone assessment
We ask for your address, the unit make and model, and what the water is doing. For repairs, that usually tells us whether it is a flow sensor, igniter, or scale blockage. We book a same-day window for no-hot-water calls and confirm the arrival time by text.
- Phone assessment
- Same-day window
- Text confirmation
-
On-site inspection
We use a pressure gauge and a sewer camera if the condensate drain ties into the stack. You get a written scope with the unit size, vent type, and permit requirements before we start.
- Gas and vent check
- Written scope
- Permit details
-
Installation or repair
For a new install, we isolate the old tank, drain it, and cap the lines. Then we mount the new unit, run copper pipe or PEX tubing, install a shut-off valve, and wire the controls. Repairs usually take one to three hours; full swaps run four to six hours.
- Isolate old tank
- Mount new unit
- Run new lines
-
Testing and flush
We fire the unit, set the outlet temperature to 120 degrees Fahrenheit, and run every hot fixture in the house. Then we check for gas leaks with a combustible gas detector and confirm the condensate drains freely. You watch the final test with us.
- Fire the unit
- Set 120 degrees
- Test every tap
-
Cleanup and walkthrough
We haul away the old tank, wipe down the area, and label the shut-off valves. You get a photo record of the install and a maintenance schedule.
Tools and methods we use on tankless systems
Move across a circle, or focus it and press Enter, for an illustrative thermal view of the photograph.
Pressure gauge
Checks incoming water pressure and gas pressure at the unit. Low pressure explains many no-hot-water calls.
Combustible gas detector
Sniffs every gas connection after installation or repair. We do not leave until it reads zero.
Recirculating descaling pump
Circulates descaler through the heat exchanger to dissolve calcium and magnesium buildup.
Tube cutter and PEX crimping tool
Cuts and joins copper pipe and PEX tubing cleanly for water line connections.
Multimeter
Tests igniters, flow sensors, and control boards to pinpoint electrical faults.
Thermal views are illustrative, generated from the photographs.
Methods
Sewer camera
Inspects condensate drain lines and nearby floor drains for blockages or root intrusion.
RIDGID and Milwaukee tools
Used daily for pipe work, venting, and tight-space repairs in mechanical closets.
Load calculation per manufacturer spec
We use the unit manufacturer's sizing tables plus measured incoming water temperature to pick the right GPM rating. That prevents the most common tankless complaint: lukewarm water at high demand.
Annual descaling flush
We connect a recirculating pump to the service valves and run descaler for 45 to 60 minutes. Then we flush with clean water and restore the unit. This is the single most important maintenance step for hard-water areas.
Pressure and leak testing
After any gas or water line work, we pressure-test the line and check every joint with a combustible gas detector or visual leak check. We document the results before we leave.
Code-compliant venting
We install stainless steel venting per Illinois code and manufacturer instructions. Proper venting prevents backdrafting and keeps the unit running efficiently in cold weather.
When to call for tankless water heater services
Tank swap
Your family keeps running out of hot water with a 40-gallon tank.
We size and install a whole-house tankless unit that delivers 7 to 11 gallons per minute. We run the gas line, venting, and condensate drain, then test every fixture. The old tank is hauled away.
Outcome: You get endless hot water for back-to-back showers and laundry. Most families never think about hot water again.
Descaling fix
Your tankless unit shows an error code and blows cold air.
We diagnose the code on site with a manufacturer-specific reader. Common fixes include cleaning the flame sensor, replacing the igniter, or flushing scale from the heat exchanger. Most repairs take one to three hours.
Outcome: Hot water is restored the same day, and you get a clear explanation of what failed and why.
Commercial install
You are remodeling a bathroom and adding a second shower.
We calculate the new peak demand and confirm whether your current unit can handle it. If not, we upgrade to a larger unit or add a second unit for the new zone. We rough in the lines before the walls close.
Outcome: The new shower runs at full temperature without stealing hot water from the rest of the house.
Aging unit
Your tankless unit is 10 years old and has never been descaled.
We inspect the heat exchanger with a borescope, flush it with descaler, and test the pressure relief valve. If the exchanger is too scaled, we quote a replacement unit with the same footprint.
Outcome: You either get several more years from the existing unit or a clear plan for replacement before it fails.
How tankless water heater services run in Arlington Heights
Arlington Heights sits in Cook County, where winter inlet water temperatures drop to 40 degrees Fahrenheit. That cold water slows heating, so we size units one step larger than a warm-climate chart would suggest. Older homes near Old Arlington Heights and Heritage Park often have 1/2-inch gas lines that need upsizing to 3/4-inch. We pull permits through the Village and meet the inspector on site.
For tankless water heater maintenance Arlington Heights customers, we recommend descaling every 12 months because local water runs moderately hard. If you need tankless vs tank water heater Arlington Heights IL advice, we walk you through the numbers for your household size and budget.
- Scarsdale: Many 1960s ranches here have mechanical closets too shallow for a tank. Wall-mounted tankless units fit where a tank cannot.
- Lake Arlington: Larger homes with multiple bathrooms often need two tankless units or one high-capacity condensing unit to keep up with demand.
- Downtown Arlington Heights
- Old Arlington Heights: Pre-1940 homes often have original gas lines that need upsizing before a tankless unit can be installed.
- Northgate: Basements here stay cool and damp, so we mount units high and route condensate to a floor drain with freeze protection.
- Cold winter inlet water near 40 degrees Fahrenheit: Units must be sized larger to reach 120 degrees at the tap. We calculate the temperature rise before recommending a model.
We walk the mechanical space and explain the plan. We lay drop cloths and set up tools. We test every fixture and review next steps.
From problem to finished result.
Tank swap to Navien condensing unit
Before: A Scarsdale homeowner had a 12-year-old 50-gallon tank that leaked onto the basement floor. Two showers at once meant cold water for the second bather. The gas line was 1/2-inch and undersized for any tankless unit.
After: We installed a Navien condensing unit, upsized the gas line to 3/4-inch, and ran new PVC venting. The unit delivers 9.5 GPM. Two showers and the dishwasher now run at full temperature. The basement floor is dry.
We set the homeowner up on annual descaling and a filter check. The unit has run without a service call since the install.
Descaling restores a scaled-out unit
Before: A Lake Arlington family had a 6-year-old Rheem tankless unit that kept shutting off mid-shower. The error code pointed to a blocked heat exchanger. Incoming flow had dropped to 2.1 GPM from a rated 8 GPM.
After: We flushed the heat exchanger with descaler for 60 minutes and cleaned the inlet filter. Flow returned to 7.8 GPM, and the unit stopped throwing codes. The repair cost a fraction of a new unit.
The family now books a descaling every 12 months. We track the date and call them when it is due.
Commercial install for a six-unit building
Before: A Downtown Arlington Heights property manager had two failing tank heaters serving six apartments. Tenants complained about cold water every morning. The mechanical room had no space for larger tanks.
After: We installed two commercial tankless units with a combined 18 GPM capacity. The permit and inspection were completed in one week. Hot water complaints stopped completely, and gas usage dropped noticeably.
We service both units twice a year and keep spare parts on the truck. The property manager gets a written service log after each visit.
Tankless water heater problems we fix in Arlington Heights
Tankless units are reliable, but they are not maintenance-free. Hard water, cold inlet temperatures, and undersized gas lines cause most of the calls we run. Here are the problems we solve every week.
- No hot waterNo hot water or inconsistent temperatureA cold shower is annoying, but the underlying cause can be a failed igniter or a blocked flow sensor. Ignoring it leads to a full unit failure and a much larger repair bill. We test the igniter, flow sensor, and gas valve with a multimeter and pressure gauge. Most no-hot-water calls are fixed in one visit with a replacement sensor or a good cleaning of the burner assembly.
- Scale buildupMineral scale buildup in the heat exchangerScale insulates the heat exchanger, so the unit burns more gas to heat the same water. Over time, it restricts flow and shortens the unit's life by half. We perform tankless water heater descaling Arlington Heights 60004 with a recirculating pump and manufacturer-approved descaler. The 90-minute flush restores flow and efficiency. We recommend it every 12 months.
- Undersized gas lineGas line too small for the unitAn undersized gas line starves the burner, causing error codes and lukewarm water. It can also fail inspection, which means the unit cannot legally be used. We calculate the BTU load and upsize the gas line to 3/4-inch or 1-inch black pipe. We pull the permit, pressure-test the line, and have it inspected. The unit then fires at full capacity.
- Condensate leakLeaking condensate line or water connectionsA slow drip under the unit corrodes the cabinet and damages the wall. In winter, a blocked condensate line can freeze and shut the unit down entirely. We replace the condensate trap and route the line to a floor drain with proper slope. We also check every water connection and replace the shut-off valve if it is seized. The area stays dry.
Why switch to an on-demand water heater
Endless hot water, lower gas use, and a unit that lasts 20 years.
Endless hot water supply
A correctly sized on-demand water heater Arlington Heights unit delivers 7 to 11 gallons per minute, enough to run two showers and a dishwasher at once. No more waiting 30 minutes between loads. For a family of four, that alone is worth the upgrade.
Lower monthly gas bills
Tankless units cut standby heat loss by 20 to 30 percent compared to a tank. You heat water only when you use it. Most Arlington Heights homeowners see the difference on their Nicor bill within two billing cycles, especially in winter when tank losses are highest.
Frees up floor space
A wall-mounted unit is about the size of a carry-on suitcase. That reclaims 9 to 12 square feet of basement or closet floor. We mount it high enough to stay clear of stored boxes and winter slush, and we route the condensate line to a floor drain.
Longer service life
Tankless water heaters last 20 years with annual descaling, roughly double a tank unit. We use a recirculating pump and manufacturer-approved descaler to flush the heat exchanger. Skipping that step in hard-water areas shortens life by half.
What you receive
Clear records you can keep and share.
Photo record
Images of the install and connections.
Service log
Date, work done, and readings taken.
Maintenance plan
Descaling schedule and filter check dates.
Condensing vs non-condensing tankless units
The two main types of tankless water heaters differ in efficiency and venting. Knowing which you have helps you understand service needs.
Condensing
Captures heat from exhaust gas for higher efficiency.
- PVC venting
- Efficiency above 90 percent
- Produces condensate
Non-condensing
Vents exhaust directly without capturing extra heat.
- Stainless steel venting
- Efficiency 80 to 85 percent
- No condensate line
Electric
Uses heating elements instead of a gas burner.
- No venting needed
- Lower flow rate
- Higher electrical draw
Parts and materials we work with
- Copper pipe
- PEX tubing
- Shut-off valves
- Gas flex line
- Stainless vent
- PVC vent
- Descaling solution
- Inlet filter
Service ZIP codes.
A list like this tells people straight away whether you cover their street. Not listed? Call and ask: it only takes a minute.
- 60005
- 60004
Towns we serve.
Based in Arlington Heights and covering the places around it. Pick one for local details.
- Downtown Arlington Heights
- Arlington Heights Business District
- Scarsdale
- Northgate
- Pioneer Park
- Greenbrier
- Creekside
- Lake Arlington
- Arlington Market
- Hasbrook
- Westgate
- Countryside
What Arlington Heights homeowners say
Frequently asked questions about tankless water heaters
We give you the full number before we start.
Yes, if you plan to stay in the home five years or more. The unit costs more upfront than a tank, but it lasts 20 years instead of 10 and cuts standby gas use by 20 to 30 percent.
A tankless unit lasts 18 to 20 years with annual descaling. Without maintenance, hard water scale builds on the heat exchanger and cuts that to 8 to 12 years.
Yes. Annual maintenance is the single biggest factor in how long the unit lasts. We flush the heat exchanger with a descaling solution, clean the inlet filter, test the pressure relief valve, and check the gas connections. The service takes about 90 minutes and costs far less than replacing a scaled-out unit.
Other plumbing services we handle
Other services from the same team.
- Faucet Repair and InstallationA dripping Moen or Delta faucet wastes water and stains the sink. We replace cartridges, seats, and supply lines, or install a new faucet you picked out. Most faucet jobs take under two hours and we test for leaks before we leave.
- Toilet Repair and InstallationA running toilet can waste hundreds of gallons a day. We replace fill valves, flappers, and wax rings, fix wobbling bowls, and install new toilets with a proper seal. Toilet swaps usually run one to two hours, start to finish.
- Shower and Bathtub ServicesLeaking shower valves, clogged tub drains, and loose fixtures are common calls. We repair and replace shower cartridges, tub drains, and trim kits, and we check behind the wall for hidden moisture. Delta, Moen, and Kohler parts stocked.
Get tankless water heater services Arlington Heights IL today
Call (224) 643-9856 for same-day tankless water heater service in Arlington Heights. We diagnose the issue, give you an upfront price, and fix it right.
Contact Five Star Plumber LLC
Call (224) 643-9856 or email us and we will get back to you fast. Tell us what is going on and we will tell you what it takes to fix it.