How to Relight a Furnace Pilot Light Safely

You can safely relight most standing-pilot furnaces yourself in about five minutes: turn the gas valve to OFF, wait five minutes for residual gas to clear, set the valve to PILOT, hold the reset button down, and click the igniter until the flame catches. Hold the button 30 more seconds after the flame is steady, then release and turn the valve to ON. If the flame dies the moment you let go, stop and call a technician - that is a thermocouple or gas-supply problem, not a lighting problem. Below we walk through the full procedure the way our techs do it on calls across Ashland, plus the warning signs that mean you should not be the one holding the match.

What a furnace pilot light actually does

A furnace pilot light is a small, continuously burning flame that ignites the main gas burner when your thermostat calls for heat. On older standing-pilot furnaces - still common in Ashland homes built before the mid-1990s - that little blue flame is the ignition source for everything else. No pilot, no heat.

The pilot also does a second job: it heats a thermocouple or thermopile, a pair of dissimilar-metal probes sitting in the flame. That probe generates a tiny millivolt signal - usually 20 to 30 millivolts - that tells the gas valve it is safe to stay open. If the probe cools, the valve slams shut within a few seconds. That is a safety feature, not a fault.

Newer furnaces skip the pilot entirely and use electronic ignition or a hot surface igniter. If your furnace has no visible pilot assembly and no reset button, you have an electronic ignition system and this guide does not apply - you need furnace ignition repair Ashland OH instead.

How do I relight my furnace pilot light in Ashland OH?

To relight a furnace pilot light in Ashland OH, work in this order and do not skip the wait step. The five-minute purge is the single most important part of the job.

1. Shut the gas off. Turn the furnace's gas valve knob to OFF. It is usually a red or black knob on the front of the burner compartment.
2. Wait five full minutes. This lets any unburned gas in the combustion chamber dissipate. Set a timer. Do not rush it.
3. Find the pilot assembly. Look for a small tube with a probe beside it, near the burners. On most units the reset button is right there.
4. Turn the valve to PILOT. Push the knob in slightly and rotate it to the PILOT position.
5. Hold the reset button and light. Press and hold the reset button, then click the piezo igniter (or hold a long lighter to the pilot orifice). The flame should catch within two or three clicks.
6. Keep holding for 30 seconds. Once the flame is lit and steady, hold the button another 30 seconds so the thermocouple heats up.
7. Release and turn to ON. Release the button. If the flame stays lit, turn the valve to ON and set your thermostat to heat.

If the flame goes out the second you release the button, repeat the sequence once. If it fails twice, stop. You are looking at a failed thermocouple or a gas-pressure issue, and no amount of clicking will fix it. That is when we get the call, and it is usually a fast fix - see our furnace thermocouple replacement Ashland OH page for what the job involves.

Is it safe to relight a furnace pilot light in Ashland Ohio?

Yes, relighting a pilot is safe for a homeowner when you follow the shutdown-and-wait sequence and you can smell no gas. The procedure is designed for it - that reset button exists precisely so a resident can relight the unit after a brief outage.

It stops being safe in three situations. If you smell gas at any point, do not touch the igniter, do not flip a light switch, and leave the house. If the pilot flame is yellow and lazy instead of a crisp blue, you have incomplete combustion and possible carbon monoxide production. If the burner compartment is soot-stained or the flame lifts off the burner, shut it down and call us.

We run furnace carbon monoxide testing Ashland OH on every pilot relight call for exactly this reason. A pilot that has been out for a while can leave a small gas residue, and a flame burning wrong can put CO into your living space. Both are cheap to check and expensive to ignore.

What if my furnace pilot light won't stay lit in Ashland?

A pilot that lights but will not stay lit almost always means the thermocouple or thermopile has failed, or the gas valve is not holding pressure. Those are the two causes behind roughly nine out of ten repeat-relight calls we run.

Here is how to tell them apart before you call anyone:

• Flame lights, dies when you release the button. Thermocouple or thermopile. The probe is not generating enough millivolts to hold the valve open.
• Flame lights, stays lit, but the main burner never fires. The pilot is fine; the problem is downstream - gas valve, control board, or thermostat signal.
• Flame lights and dies within a few minutes on its own. Draft or pressure issue. Check that the flue is not blocked and the furnace filter is not packed solid.
• Flame is yellow, sooty, or flickering hard. Combustion problem. Shut the unit down and call us.

We see this pattern constantly in the older housing stock around Downtown Ashland, where furnaces from the 1980s and 1990s are still running on original thermocouples. A thermocouple is a $15 part and about an hour of labor. If your furnace keeps going out in Downtown Ashland, that is the first thing we check.

Common mistakes we see on pilot relight calls

The mistakes that turn a five-minute job into an emergency call are almost always the same four, and we see them every heating season in Ashland County.

Skipping the five-minute wait. This is the one that actually hurts people. Turning the gas back on too soon and clicking the igniter can flash the accumulated gas in the chamber. Set a timer and walk away.

Using a match instead of the igniter. A long-reach lighter is fine. A short match puts your hand inside the burner compartment, and if the pilot lights and the main burner follows, you get a face full of flame.

Holding the reset button with tape or a clamp. People do this to "keep the pilot going." You are defeating the safety interlock. The valve is supposed to close when the thermocouple cools. If it does not, you have a gas leak waiting to happen.

Relighting a furnace that has been flooded. If your basement took on water - and we get a few of those every spring in Ashland - the gas valve and control board may be wet. Do not light it. Call us and we will dry-test the components first.

One more: don't relight and walk away. Stay near the furnace for ten minutes after the main burner fires. Listen for a steady rumble, not a whoosh-and-stop cycle. If it short-cycles, you have a different problem - often furnace limit switch repair Ashland OH territory.

When to call a professional

Call a professional the moment the pilot fails to hold twice, you smell gas, or you see a yellow flame. Those are not judgment calls. They are the three conditions where a homeowner relight turns into a safety issue.

We also want the call if your furnace is more than 15 years old and this is the second or third pilot failure of the season. At that point you are paying for repeat visits on a unit that is telling you it is done. We will tell you straight whether a thermocouple swap gets you another winter or whether you should be pricing a replacement.

Our team handles emergency furnace repair Ashland OH around the clock, and most pilot failures are a same-visit fix. We carry common thermocouples, thermopiles, and gas valve parts on the truck, so we are not making two trips. If you want the full picture of what we do and how we price it, our Emergency Furnace Repair Ashland OH page lays it out.

Frequently Asked Questions

How do I relight my furnace pilot light in Ashland OH?

Turn the gas valve to OFF, wait five minutes, set the valve to PILOT, hold the reset button, and click the igniter until the flame catches. Hold the button 30 seconds after it lights, release, then turn the valve to ON. If it dies on release twice, call a tech.

Is it safe to relight a furnace pilot light in Ashland Ohio?

Yes, if you follow the shutdown-and-wait steps and smell no gas. It is not safe if you smell gas, if the flame is yellow instead of blue, or if the burner compartment is sooty. In those cases, shut the furnace down and call us.

What if my furnace pilot light won't stay lit in Ashland?

A pilot that lights but dies when you release the button is a thermocouple or thermopile failure about 90% of the time. It is a $15 part and roughly an hour of labor. If it stays lit but the main burner never fires, the issue is the gas valve or control board.

How much does a furnace pilot light repair cost in Ashland?

Typical 2026 pricing in this area runs $150 to $350 for a thermocouple or thermopile replacement, including the service call. Gas valve replacements run $400 to $700. If the control board is the culprit, expect $500 to $900 depending on the board.

Why does my pilot light keep going out every winter?

Three usual causes: a thermocouple that is on its way out, a dirty pilot orifice that produces a weak flame, or a blocked flue causing draft problems. A furnace tune-up each fall catches all three before the first cold snap in Ashland County.

Get help with Emergency Furnace Repair in Ashland

If your pilot will not hold, you smell gas, or you simply want a second set of eyes before the next cold front rolls through, we are the local call. We diagnose, we carry the parts, and we get your heat back on the same visit in most cases.

Call Ashland Furnace Repair Pros at +14195820227 - day, night, or weekend.