Grant Park gas fireplace that clicked but would not light: a failed gas valve, not the pilot
A Grant Park homeowner could hear the igniter clicking and smell nothing — no flame, no heat. The pilot lit fine by hand. The part that had quietly failed was the gas valve, and that is not a homeowner repair.
Pilot lights, burner won’t — where to look
A gas fireplace that lights the pilot but will not bring up the main burner is telling you something specific. The pilot flame heats a thermopile, which generates the small voltage that tells the gas valve it is safe to open the main burner. If the pilot is strong and steady but the burner stays dark, the fault is downstream — the thermopile is weak, the connections are corroded, or the valve itself has failed internally. In Grant Park’s mix of older village homes and newer builds, we see gas inserts of every vintage, and valves do wear out.
We tested the thermopile output and the millivolt signal at the valve. The pilot generated good voltage, but the valve was not opening the main stage. The valve had failed.
Why gas valve work is not a DIY job
A gas valve meters live fuel. Replacing one means breaking a gas connection, matching the exact valve the appliance was built for, setting the correct manifold pressure, and leak-testing every joint before the unit goes back in service. Get any of that wrong and you have either a unit that will not run or a gas leak you cannot smell until it is a problem. This is work for a qualified technician with the right gauges, not a weekend fix, and we will not walk a homeowner through it over the phone.
We sourced the correct replacement valve for the model, installed it, set the pressure, and leak-tested the system. We work to the NFPA 211 standard and we are insured and bonded for gas appliance work.
What a tune-up catches before it strands you
Most no-light calls we get in the first cold week trace to parts that were showing their age last winter — a lazy pilot, a tired thermopile, dust-clogged burner ports, or a valve starting to stick. An annual gas fireplace tune-up tests the thermopile voltage, cleans the pilot assembly and burner, checks the glass gasket and venting, and catches a weak valve before it quits on the coldest night. [Observed] The majority of our dead-fireplace calls cluster in the first two weeks of real cold, after the unit sat unused all summer.
If your fireplace clicks but will not light, have it looked at rather than guessing at parts. Our tune-up and repair pricing is published, and we are open 7am to 9pm every day.
If this sounds like your house: we handle gas fireplace tune-ups across Kankakee County, and our Grant Park page covers what we usually find there. Call (815) 449-4264, 7am to 9pm, any day.
Quick questions
My gas fireplace pilot lights but the flames won’t come on. Why?
The pilot heats a thermopile that signals the gas valve to open the main burner. If the pilot is fine but the burner stays dark, the thermopile, its wiring, or the valve itself has usually failed. A tech can test which.
Can I replace a gas fireplace valve myself?
No — we don’t recommend it and won’t coach it over the phone. It means breaking a live gas connection, matching the exact valve, setting manifold pressure, and leak-testing. That’s qualified-technician work.
How do I know if it’s the thermopile or the valve?
A technician measures the thermopile’s millivolt output and the signal at the valve. Good voltage with a burner that won’t open points to the valve; low voltage points to the thermopile or its connections.
What does a gas fireplace tune-up include?
We test the thermopile voltage, clean the pilot assembly and burner ports, inspect the glass gasket and venting, and check the valve operation — catching weak parts before they fail in the cold.
Published November 8, 2026 · By Jacob Dove, Friendship Chimney Sweep, Bourbonnais IL