Standing Pilot Won't Hold
Decades-old thermocouples in Missouri masonry fireplaces corrode and weaken. The pilot lights while you hold the knob and dies the moment you let go — a classic, inexpensive fix.
Licensed & Insured 5-Star Rated Pilot & Ignition Experts
Gas Fireplace Repair in St. Louis, MO — Get the Flame Back Today.
Gas fireplace repair for St. Louis winters and older homes. Pilot won't stay lit, clicks but won't ignite, shuts off on its own, or glass gone black? We test the actual components — sensors, valve, pressure, venting — and repair what failed.
- Safety Check on Every Visit
- Tested, Not Guessed
- Written Price Before Work
- 10% Hero Discount
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Pilot & ignition repairs
Valve & pressure testing
Remote & switch faults
Annual gas fireplace service
Local Expertise
Gas Fireplace Repair Built for St. Louis Homes
St. Louis runs its fireplaces hard from November through March, and the housing stock is split: century-old brick homes in Soulard, Tower Grove and the Central West End with gas log sets in original masonry fireplaces, and newer Kirkwood, Webster Groves and St. Charles County houses with direct-vent inserts.
The old masonry installations usually fail at the standing pilot and thermocouple, and often hide a second issue — a deteriorated flue or a missing damper clamp. The newer inserts fail electronically. We test both properly, including a carbon monoxide and draft check, before quoting the repair.
Common Symptoms
Why St. Louis Gas Fireplaces Fail
Most gas fireplace failures come down to a handful of parts. Recognising the symptom tells us most of what we need before we arrive.
Damper and Draft Problems
A gas log set in an old chimney needs the damper permanently clamped open and a sound flue. We check for both, because a blocked or leaking flue with gas logs is a carbon monoxide risk.
Winter Vent Blockage on Inserts
Snow, ice and debris at an exterior vent termination will trip a direct-vent insert's safety switch and shut it down in the middle of a cold snap.
Gas fireplace calls booked this week
Tell Us What It's Doing — We'll Tell You What Failed
Pilot dying, clicking igniter, dead remote, black glass. Describe the symptom and we'll bring the likely parts to the first visit.
Prefer to send details?
Share what you're seeing and we'll contact you to confirm the right next step.
Send My Fireplace DetailsFree written estimates · No obligation
What We Repair
Repairs Based on Measurements, Not Guesses
Thermocouple & Thermopile Replacement
The most common gas fireplace repair there is. We test millivolt output rather than guessing, then replace the sensor that can no longer hold the valve open.
Gas Valve & Pressure Testing
We measure inlet and manifold pressure with a manometer, check the valve's response to the switch or remote, and replace the valve only when it has genuinely failed.
Ignition, Switch & Remote Repairs
Intermittent pilot ignition modules, wall switches, wiring at the valve, receivers and batteries — when the burner is fine and the control path is not, this is the fix.
Burner Cleaning & Log Placement
Dust, debris and misplaced ceramic logs cause sooting and uneven flames. We clean the burner ports and pilot assembly and set the logs to the manufacturer's layout.
How It Works
From Dead Pilot to Working Fireplace
1. Describe the Symptom
Pilot dying, clicking without lighting, remote not responding, black glass — tell us what it does and we will bring the likely parts.
2. Safety Check First
Gas connections, venting, draft and carbon monoxide risk are checked before anything else. If it is not safe to run, we say so immediately.
3. Test, Don't Guess
Millivolt output at the sensors, gas pressure at the valve, continuity in the control path. Measurement is what separates a real diagnosis from parts-swapping.
4. Written Price Before Work
You get the diagnosis, the part that failed and one written price. Nothing is replaced before you approve it.
5. Repair and Run It With You
We complete the repair, run the fireplace through a full cycle and show you the flame pattern, the switch and the remote working.
Gas Safety — Read This First
If you smell raw gas, do not operate switches or the fireplace. Leave the house and call your gas utility from outside, then call us. That is not an upsell — it is the correct order of operations.
Soot on the glass, a persistent odor while burning, or headaches and drowsiness when the fireplace runs point to incomplete combustion and possible carbon monoxide. Shut the fireplace off and have it inspected before using it again. A working carbon monoxide alarm on every level of the home is not optional with any gas appliance.
5-Star Rated
What Homeowners Say About Us
5.0 average rating
Serving St. Louis, Missouri and the surrounding area
“Gas insert wouldn't stay lit. Diagnosed a faulty thermopile, replaced it, cleaned the glass and logs. Polite, tidy and reasonably priced for a same-week visit.”
Rick P.
Gas Fireplace Repair · Florissant · 2 months ago
“Our old brick chimney was losing mortar. The tuckpointing matches the original brick beautifully and they were respectful of the yard and gutters the whole time.”
Jeff M.
Tuckpointing & Chimney Repair · Kirkwood · 3 weeks ago
“Century-old house, first proper sweep in years. He was careful, explained the creosote buildup, and didn't leave a mark on the rug. Booking was easy and he showed up on time.”
Colleen H.
Chimney Sweep & Inspection · Webster Groves · 1 month ago
Gas Fireplace FAQs
Answers Before You Book a Repair
Not sure whether it's worth repairing? Call and describe what it's doing — we'll tell you straight.
(682) 217-3577The usual cause is a worn thermocouple or thermopile that no longer generates enough millivolts to hold the gas valve open, or a pilot orifice partially blocked by dust or debris. Both are common, inexpensive repairs — we test the output rather than replacing parts on a guess.
It depends entirely on which component failed. A thermocouple or a cleaning is a small job; a gas valve, ignition module or blower is a larger one. We diagnose on site and give one written price before doing any work — never a number over the phone.
Two likely causes: a weak thermopile that drops below the voltage needed to keep the valve open once the unit heats up, or a safety switch tripping because the vent is restricted. Both are diagnosable in a single visit.
A brief dusty smell on the first burn of the season is normal. Persistent soot, black glass, strong odors or headaches while the fireplace runs are signs of incomplete combustion, which can produce carbon monoxide. Shut it off and have it checked. If you smell raw gas, leave the house and call the gas utility first.
Once a year, ideally before the heating season. Annual service cleans the burner and pilot assembly, verifies gas pressure, tests the sensors and inspects the venting — it is what prevents the mid-winter no-heat call.
Yes. Vented gas log sets in masonry fireplaces and sealed direct-vent inserts fail in different ways and use different parts. Tell us which you have — or send a photo — and we will bring the right components.
Usually yes. Valves, sensors, igniters, blowers and remote receivers remain available for most major brands well past twenty years. We only recommend replacement when the firebox or venting is genuinely unsafe.
Yes — 10% off for military, veterans, seniors 65+, police, firefighters and EMTs. Mention it when you call (682) 217-3577.
It can be, provided the flue is sound, the damper is clamped open and the unit is the right type for the fireplace. Those are exactly the things we check — an unlined or cracked flue with gas logs is a genuine carbon monoxide concern.
Late summer through early fall. Once the first hard freeze arrives the schedule fills quickly, and a pre-season service catches the sensor and vent problems that cause mid-winter shutdowns.
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Get Your Gas Fireplace Working Again
One visit, a real diagnosis and a written price. Call now and we'll get you on the schedule.