Full Ignition Circuit Test
We test the igniter, flame sensor, thermocouple, and gas valve with a multimeter before replacing anything. This confirms the igniter is the actual failure and not a symptom of a weak gas valve or dirty sensor.
Same-day igniter replacement for gas and tankless water heaters
Water Heater Igniter Repair Littleton CO Done Right the First Time
When your water heater won't fire, Water Heater Igniter Repair Littleton CO from our team gets hot water back the same day. We diagnose the igniter, gas valve, and thermocouple, then replace failed components with OEM parts for Rheem, A.O. Smith, Bradford White, Navien, and Rinnai units. Serving Littleton, Ken Caryl, and Arapahoe County with licensed, code-correct work.
Careful work. Honest options.
About this service
Water Heater Igniter Repair Littleton CO: What It Involves
Water Heater Igniter Repair Littleton CO is the diagnostic and replacement service that restores ignition to a gas or tankless water heater when the igniter, flame sensor, or gas valve fails to light the burner. On a standard tank unit, the igniter is a hot-surface element that glows orange at roughly 1,200 degrees Fahrenheit to light the gas. On a tankless unit, the igniter fires in sequence with the flow sensor and gas valve. When any of those parts fail, you get cold water, error codes, or a unit that clicks but never lights.
In Littleton, igniter failures spike in late fall and winter when incoming water temperatures drop into the 40s and your heater works harder to hit 120 degrees. Older tanks in Historic Downtown Littleton and Grove Street often run original igniters past 10 years, while newer tankless installs in Ken Caryl and Roxborough deal with scale buildup that fouls the igniter and flame sensor. If you search for igniter repair near Littleton, we can usually be on-site the same day.
- ✓ Same-Day Hot Water
- ✓ Full Diagnostic, Not Guesswork
- ✓ OEM Parts Only
- ✓ Code-Correct Gas Work
What's included
What's Included in Our Igniter Repair Service
Every igniter repair includes a full diagnostic of the ignition circuit, not just a part swap. Here's what's covered in the flat price, and what we'll flag as an add-on if we find it.
OEM Igniter Replacement
We install a manufacturer igniter matched to your model, with the correct bracket and torque. Universal igniters are cheaper but fail faster. We don't use them.
Burner and Flame Sensor Cleaning
While the burner assembly is out, we clean the flame sensor and burner ports. Dust and scale on these parts cause repeat ignition failures even after a new igniter goes in.
Gas Leak and Venting Check
We leak-test every gas joint we open and verify venting meets Uniform Plumbing Code. Igniter work means opening the gas train, so this check is part of the job, not an extra.
Three-Cycle Fire Test
We run the heater through three full firings and confirm it lights within 3 seconds each time. If it short-cycles or throws an error code, we keep diagnosing before we leave.
1-Year Parts Warranty
Every igniter we install carries a 1-year parts warranty. If it fails inside that window, we replace it at no charge. Labor on the return trip is also covered for the first 30 days.
How it works
How Our Igniter Repair Process Works
You call and describe what the heater is doing: clicking, error code, no hot water, or a pilot that won't stay lit. We ask for the brand and model so we can load the right igniter on the truck. Most calls are booked for the same day, often within a two-hour window.
A licensed technician tests the igniter with a multimeter, checks resistance and voltage at the gas valve, and verifies the thermocouple and flame sensor. This takes 20 to 30 minutes. You get a straight answer on what failed and a flat price before any work starts.
We shut off gas, pull the burner assembly, and swap the igniter using the correct bracket and torque spec. On tankless units we also clean the flame sensor and check the flow sensor. Replacement itself runs 30 to 45 minutes on a tank, 45 to 60 on a tankless.
We relight the unit, watch it cycle through three full firings, and confirm the burner lights within 3 seconds each time. We check for gas leaks at every joint, verify venting, and test the pressure relief valve. Nothing gets signed off until the heater runs clean.
We show you what failed, what we replaced, and how to spot early warning signs next time. You get a written invoice with the 1-year parts warranty on the igniter. If the heater throws an error code in the next 30 days, we come back at no charge.
STEP 01Phone Triage
You call and describe what the heater is doing: clicking, error code, no hot water, or a pilot that won't stay lit. We ask for the brand and model so we can load the right igniter on the truck. Most calls are booked for the same day, often within a two-hour window.
Tools & methods
Tools and Methods We Use for Igniter Repair
Multimeter
Tests igniter resistance, gas valve voltage, and thermocouple output. This is how we confirm the igniter is the actual failure before replacing it.
Thermostat Tester
Verifies thermostat calibration and confirms the unit is calling for heat correctly. A thermostat reading wrong can cause short cycling that wears out the igniter.
Pipe Wrench and Tube Cutter
Used to open gas lines and replace fittings when the gas valve or thermocouple also needs work. Every joint gets leak-tested before we close up.
Soldering Torch
For copper gas line repairs when a fitting needs to be replaced. We use it only when the gas is off and the line is purged.
Inspection Camera
Lets us look inside the burner compartment and heat exchanger on tankless units without full disassembly. We use it to spot scale, debris, and cracked components.
Pressure Gauge
Checks gas pressure at the valve and water pressure at the tank. Wrong gas pressure is a common cause of ignition failure that a part swap won't fix.
Real results
Before and after.
Water Heater Igniter Repair
Tankless Unit Restored in Ken Caryl
A Navien tankless heater in Ken Caryl showed error code 12 and produced no hot water for two days. The homeowner had already replaced the igniter once with a universal part, which failed within six months.
After: We installed an OEM Navien igniter, cleaned the flame sensor, and descaled the heat exchanger with a descaling pump. The unit fired in 2.5 seconds on all three test cycles. Hot water was back the same afternoon.
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Water Heater Igniter Repair
Older Rheem Tank Back Online
An 11-year-old Rheem tank in Historic Downtown Littleton clicked but wouldn't light. The homeowner had been without hot water for three days and was ready to replace the unit.
After: We tested the ignition circuit and found a burned-out igniter and a weak gas valve. Replaced both with OEM parts for $410 total. The heater lit within 3 seconds and ran through three full cycles clean.
Book this service → Water Heater Igniter Repair
Holiday Emergency in Bow Mar
A property manager in Bow Mar called on December 23 with a tenant who had no hot water. The heater was a Bradford White tank showing no ignition. Two other companies quoted a next-week appointment.
After: We arrived within three hours, diagnosed a failed igniter and dirty flame sensor, and had the unit running by early evening. Total cost was $285. The tenant had hot water before the holiday.
Book this service → Problems we solve
Igniter Problems We Solve for Littleton Homeowners
A water heater igniter not working in Littleton CO usually shows up as one of these symptoms. Here's what each one means and how we fix it.
Ask a pro →Heater clicks but never lights
We test igniter resistance and gas valve voltage with a multimeter. In most cases the igniter has burned out or the flame sensor is too dirty to confirm ignition. We replace the failed part and clean the sensor.
Pilot light won't stay lit
We test the thermocouple and gas valve, then replace the failed component. If the unit has a hot-surface igniter instead of a pilot, we diagnose that circuit instead. Either way, you get reliable ignition.
Tankless unit throws an ignition error code
We pull the code, then test the igniter, flame sensor, and flow sensor in sequence. Scale on the heat exchanger is a common cause in Littleton. We descale the unit and replace any failed ignition component.
No hot water after a power outage
We test the igniter and control board for voltage and resistance. If the igniter failed, we replace it. If the board is damaged, we diagnose that and quote the repair separately before doing it.
Proof you can check
Licensed, Certified, and Local
- Colorado Master Plumber License · State of Colorado
- NATE Certification · North American Technician Excellence
- EPA Lead-Safe Certified · U.S. Environmental Protection Agency
- Backflow Prevention Certification · State of Colorado
- OSHA 10 · Occupational Safety and Health Administration
Most igniter repairs in Littleton run $180 to $420 in 2026, including the part and labor. Tank units sit at the lower end; tankless units run higher because the burner assembly takes longer to access. If the gas valve or thermocouple also failed, expect $350 to $650. We quote a flat price after diagnosis, and the diagnostic fee is waived when you approve the work.
The three most common causes we find in Littleton are a burned-out hot-surface igniter, a dirty flame sensor that can't confirm ignition, and a weak gas valve that won't open fully. Hard water scale and dust from nearby construction accelerate all three. If your heater clicks but won't light, or throws an ignition error code, the igniter circuit is the first thing we test.
Littleton Plumbing Solutions repairs igniters on gas tank and tankless water heaters across Littleton and Arapahoe County. Our technicians are Colorado Master Plumber licensed and NATE certified on gas diagnostics. We carry OEM igniters for Rheem, A.O. Smith, Bradford White, Navien, Rinnai, Noritz, and Takagi, so most repairs are finished in one visit.
Yes. Same-day igniter replacement is standard for us when you call before early afternoon. We stock the most common igniters on every truck, so 80 percent of jobs are done in a single visit. If your model needs a part we don't carry, we can usually have it by the next morning and we'll schedule the return trip at no extra labor charge.
Ready when you are
Get Your Water Heater Igniter Repair Littleton CO Today
Cold water doesn't wait, and neither should you. Call Littleton Plumbing Solutions for same-day igniter diagnosis and repair. Licensed, insured, and stocked with OEM parts for every major brand. One call gets a technician to your door.
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Request an appointment
Contact Littleton Plumbing Solutions
Call us at +1 303-879-0886 or send an email to info@littletonplumbingsolutions.com. We answer the phone 24/7 for emergencies and book regular service Monday through Friday. Most calls get a same-day slot, and we will give you a real arrival window, not a four-hour block.
Call anytime+13038790886Email the officeinfo@waterheaterrepairlittleton.com
Office hoursOpen 24 hours · 7 days a week