Space Fireplace Services
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SFS_problem_gas-fireplace-pilot-wont-sta
Space Fireplace Services — DFW chimney & fireplace specialists. Free inspection, written quote, no surprise fees.
We Have Fixed This Thousands of Times
The pilot lights, holds for ten or fifteen seconds, and then dies. You release the control knob and the flame goes out. You try again. Same result. This is the single most common gas fireplace failure mode in Dallas, and it almost always traces to one of five causes — listed here in order of how often we find them. Space Fireplace Services has diagnosed and repaired this exact symptom in hundreds of homes across DFW. The fix is usually quick and inexpensive. Occasionally it points to something more serious. The diagnostic flow below will help you understand what is happening before you call. If you would rather skip the diagnosis and have us out, call 469-992-4912.The Cause Hierarchy
**1. Thermocouple or thermopile failure.** This is the cause about 70 percent of the time. The thermocouple is a small metal probe whose tip sits inside the pilot flame. When heated, it generates a tiny voltage that tells the gas valve “the pilot is lit, keep the gas flowing.” When the thermocouple fails — corroded tip, broken wire, weak signal — the valve does not get the voltage it needs and shuts the gas off as a safety measure. The pilot dies. **2. Dirty pilot orifice.** Dust, lint, spider webs, and corrosion can partially block the small orifice that feeds gas to the pilot flame. The flame becomes weak, lazy, or yellow rather than blue and sharp. A weak flame does not heat the thermocouple enough to keep the valve open. **3. Misaligned pilot flame.** Even with a clean orifice and a working thermocouple, the pilot flame has to actually wrap around the thermocouple tip to heat it correctly. If the pilot has been bumped during cleaning or service — or never aligned correctly from install — the flame may be missing the tip and not generating enough voltage. **4. Failing gas valve.** Less common, more expensive. The millivolt valve that holds the pilot open can wear out internally — the magnetic solenoid that opens the gas path no longer holds open at full pilot voltage. If thermocouple replacement does not solve the problem and the pilot flame is good, the valve is the next suspect. **5. Safety lockout.** Modern gas fireplaces with intermittent pilot ignition have a control board that can lock out after a series of failed ignition attempts. The board has to be reset, and the underlying cause of the lockout — usually one of the four issues above — has to be resolved before the lockout will clear permanently.Diagnostic Flow You Can Run Safely
Before you call us, two things you can do safely: **Look at the pilot flame.** It should be blue, sharp, and clearly wrapping around the thermocouple tip. Yellow, lazy, weak, or missing the tip are all problems. If the flame is yellow or weak, the orifice is dirty. If the flame is sharp but bypasses the thermocouple, alignment is off. **Check the wire connections.** The thermocouple connects to the gas valve with a small threaded fitting. If you can see the connection without removing the burner assembly, check that the fitting is hand-tight plus a quarter turn. A loose connection will cause exactly this symptom.What You Should NOT DIY
Do not disassemble the burner pan. Do not remove the gas valve. Do not adjust the pilot orifice. Do not bypass the safety control. These are the things that turn a $250 thermocouple replacement into a $2,500 unit replacement plus a code violation. **If you smell gas at any point during inspection, stop.** Do not continue. Leave the home, call your gas utility’s emergency line, then call us at 469-992-4912.When to Call SFS
Call us if any of the following is true. The pilot will not stay lit after you have confirmed the flame looks correct and the thermocouple connection is tight. The pilot will not light at all. The unit clicks repeatedly without ignition. The unit lights but the burner shuts off after a few minutes. You smell gas at any point. We schedule diagnostic visits Monday through Saturday in the Dallas core. The visit takes about an hour. We bring the most common replacement parts in the truck — thermocouples, thermopiles, and pilot assemblies for the major manufacturers — so a typical thermocouple replacement is solved in a single visit.Process and Cost
The diagnostic visit is $185 in the Dallas core. If we find a failed thermocouple and replace it on the first visit, total cost typically runs $325 to $425. A pilot assembly cleaning and rebuild typically runs $385 to $525. A failed gas valve replacement runs $650 to $1,200 depending on the valve type and the unit’s age. Control board replacement on a unit with intermittent pilot runs $550 to $950. If the diagnostic reveals a unit at end-of-life, we credit the diagnostic fee against any conversion or replacement work you choose to schedule with us.Selected Project: A Lakewood Service Call
The owner had bought the home four years earlier. The fireplace had worked through the first three winters and stopped holding the pilot at the start of the fourth. He had tried twice to relight it himself and gotten the same result. We arrived, observed the pilot flame, and immediately saw it was sharp, blue, and well-aligned. The thermocouple connection at the valve was hand-tight. We tested the millivolt output across the thermocouple terminals and read 9 millivolts — well below the 25-30 millivolts a healthy thermocouple produces. We replaced the thermocouple, retested, read 28 millivolts. Pilot held. Total time on site: 38 minutes. Total invoice: $345.Frequently Asked Questions
**How long should a thermocouple last?** Eight to twelve years is typical. Some last twenty. Once one fails, we recommend annual inspection of the assembly because the failure mode is usually a wear-and-corrosion issue across the entire pilot assembly. **Can I replace the thermocouple myself?** The part is inexpensive and the swap looks simple in YouTube videos. We do not recommend it. The pilot has to be aligned correctly after replacement, the valve has to be tested for the correct millivolt response, and the gas connection has to be leak-tested. A thermocouple replaced incorrectly is a fire risk. **How quickly can you come out?** For pilot-light failures during the cold-weather season we typically schedule within two to four business days. During the first cold snap of the season we book out faster — call early. **Do you service all gas fireplace brands?** Yes. We service Heat & Glo, Heatilator, Mendota, Napoleon, Regency, Lopi, Travis, FPX, Empire, and most other major manufacturers. **Will the diagnostic visit be applied if I need to replace the unit?** Yes. If the diagnostic reveals a unit at end-of-life, we credit the diagnostic fee against any conversion or replacement work scheduled with us within ninety days.Schedule a Service Visit
If your pilot will not stay lit, call 469-992-4912 or write through the form. We schedule diagnostics Monday through Saturday across the Dallas core.Adjacent Resources
– [Gas fireplace clicks but won’t ignite](https://spacefireplaceservices.com/gas-fireplace-clicks-no-ignition-dallas/) – [Fireplace smells like gas](https://spacefireplaceservices.com/fireplace-smells-like-gas-dallas/) – [Gas fireplace repair service hub](https://spacefireplaceservices.com/gas-fireplace-repair/) – [Gas conversion service hub](https://spacefireplaceservices.com/gas-conversion/) – [Fireplace remote not working](https://spacefireplaceservices.com/fireplace-remote-not-working-dallas/) — *Author: Marco Hensley, Senior Project Manager, Space Fireplace Services.*Our Sister Companies — Specialists in Related Services
Texas Service Experts is part of a network of CSIA-certified chimney specialists. Depending on your specific need:
- Texas Service Experts — general chimney sweep/inspection
- Texas Chimney Experts — chimney repair/masonry