Cost GuideUpdated June 11, 2026
If your water heater is suddenly running cold, the pilot light is often the culprit. In Plano, where homes range from newer builds to older properties with aging systems, pilot light problems come up more often than you might think. With our mix of winter freezes and humid summers, water heaters here get a real workout all year.
Why Pilot Lights Go Out in Plano Homes
Pilot lights are a small but critical part of gas water heaters. When that flame goes out, you lose hot water. Around Plano, moderate water hardness can lead to mineral buildup in older tanks, which may increase cycling and wear on pilot assemblies. Drafts in utility rooms or basements, especially during our cold windy winters, also play a role. Sometimes we see thermocouples fail just from age or sediment.
What to Check Before Relighting
Before you try to relight the pilot yourself, make sure it's a job you feel safe doing. Always read your water heater's manual first, and if you ever smell gas, leave the area and call a professional right away. Here's what we typically suggest checking:
- Is the gas supply valve turned all the way on?
- Are there any visible signs of a gas leak or strong gas smell in the room?
- Does the pilot assembly look dirty, corroded, or blocked by sediment?
- Is the reset button sticking or not clicking properly?
- Does the thermocouple sit right in the flame?
For step-by-step guidance, our water heater services page covers safely shutting off and relighting. Some units have unique ignition systems, so don't force any control dials or panels.
Common Relighting and Repair Costs in Plano
Homeowners often ask about the typical cost for relighting or fixing a pilot light. If all you need is a basic relight and no parts are faulty, a service call is often minimal. If the thermocouple, pilot tube, or ignition system needs repair or replacement, costs can add up depending on access, tank age, and model. For many homes in Plano, especially those with 1990s or 2000s tanks, these repairs are usually straightforward unless corrosion or mineral scale has damaged internal parts.
If you run into repeated outages, it's best to have a professional inspect for underlying issues. Proactive cleaning, part replacement, and checking connections can prevent bigger headaches down the line. Some local homeowners combine this with other pipe repairs or repiping if their system shows its age.
Signs You Need Professional Help
While relighting sometimes works if the flame simply got blown out, several warning signs mean it's time to call a pro:
- Pilot light won't stay lit more than a few seconds
- Thermocouple looks bent, broken, or covered in white deposits
- You smell gas after multiple tries to relight
- Soot or discoloration near the burner compartment
- Visible water leaks around the tank base
Don't ignore these. Gas-related issues are a major safety concern. A trained plumber can spot whether it's a draft problem, a bad gas control valve, or sediment buildup. We sometimes find that homes near the Fox River or in older parts of town have higher sediment due to local water supply traits.
Preventing Future Pilot Light Issues
Regular care is the best way to keep your water heater running. Flushing the tank once or twice a year helps control mineral buildup, especially with Plano's moderate water hardness. Cleaning the air intake screen and inspecting the thermocouple go a long way. If basement flooding has ever been a concern, common for homes close to the river, a tight sump pit and annual sump pump checkup can keep moisture away from your water heater.
It's also smart to inspect other parts of your plumbing system. If you've had leaks or pressure drops, consider a quick visit from our leak detection and repair team. Addressing these concerns together can help protect your investment and avoid sudden cold showers.
What Happens During a Professional Service Call
When our crew arrives, we start with a visual inspection, test the gas supply, and check for carbon buildup or corrosion. If the pilot assembly or thermocouple needs replacement, we carry compatible parts for most water heater brands common in Plano. While on site, we also check for any leaks or ignition issues. Some homeowners schedule a full drain cleaning during the same visit to keep everything running smoothly, especially if aging pipes or mineral scale have become a nuisance.
Our team always explains costs up front, so you know what to expect. If the water heater is past its best years, we can talk through repair versus replacement options to help you plan ahead.
If your water heater pilot light keeps going out or you're stuck with cold water, call us at 630-332-8735. Our team serves Plano and the western Chicago suburbs with real hands-on experience. We'll get your hot water back and make sure the job is done safely.