Gas Fireplace Keeps Turning Off

Shutdowns that need attention now

The shutdown itself is usually a safety control doing its job. Never block it, bypass it or keep restarting the fireplace to beat it.

• You smell gas or a CO alarm sounds. Leave, then call 911 or your gas company from outside; our gas smell and CO alarm page has the numbers.
• The flames lift off the burner, look ragged, or leave soot on the glass. Enviro's owner's manuals link lifting flames to a leak in the vent pipe or exhaust recirculating at the outside vent cap, and sooting to venting problems and a blocked vent cap. Turn the fireplace off and have it checked.
• Snow, ice, leaves or anything else covers the outside vent cap. Keep the fireplace off until the vent has been cleared and checked. The Massachusetts Department of Fire Services advises checking vent pipes, flues and chimneys for leaks or blockages.
• The fireplace shuts off and restarts over and over in manual mode. Stop using it until a gas fitter has tested it.

Causes, from simple settings to venting

A technician checks the settings first, then the power, then the pilot sensor, and finally the vent and the gas supply. Note which of these match your pattern.

• Thermostat and timer modes. In thermostat mode the flame cycles on and off to hold the set temperature, as Enviro's G39 manual describes. Valor's H4 manual adds that in its temperature and timer modes the handset senses the room temperature, so where you leave the handset affects when the flame turns down.
• The 7-day pilot shutoff. Regency's Proflame 2 owner guide says that on models with a 7-day timer, the continuous pilot goes out after 7 full days without use, and turning the system off and on again restarts it.
• Batteries. Weak batteries in the handset or the battery holder can make a fireplace act erratically. Valor's manual warns of critically low holder batteries with a faster series of beeps than usual.
• A weak pilot sensor. If the thermocouple or thermopile is worn, or the pilot flame no longer wraps it, the fireplace may start and then drop out. Enviro's C34 manual's fixes for burners that won't stay lit include checking the flame on the thermopile and a 300-millivolt minimum.
• Venting and wind. A direct-vent fireplace breathes through its outside vent cap. A leaking vent pipe, a vent layout that doesn't match the manual, or wind pushing exhaust back into the intake can make flames lift and burn poorly. Enviro's manuals say a high-wind vent cap may be needed when exhaust recirculates.
• Ignition lockout. On electronic ignition, the control stops after too many failed spark attempts; Enviro's G39 manual says it waits 5 minutes before you can try again.
• Gas pressure. Both Enviro manuals include checking gas line pressure when a burner won't stay lit. That takes a gauge and a licensed gas fitter.

What you can rule out yourself

These checks use the remote, the batteries and your own notes. None of them involve the vent, the burner or gas parts.

• Switch off thermostat and timer modes and run the fireplace in manual mode for a while. If it stays on, the settings were turning it off.
• Move the handset away from the fireplace. Valor's manual says not to leave it on the mantel or hearth, and to keep it within 15 feet so it can communicate.
• Replace the handset and battery-holder batteries with good ones; Regency notes that fireplace heat drains low-quality batteries quickly.
• Keep a short log: how long it runs before shutting off, whether the pilot stays lit after the burner goes out, and whether it happens on windy or very cold days.
• On cold days, Enviro's G39 manual recommends continuous pilot mode when it's below 50°F outside, to keep the vent warm and cut down condensation on the glass at start-up.
• Look at the outside vent cap from the ground. If anything is blocking it, keep the fireplace off and have it checked.

What the repair involves

A licensed Massachusetts gas fitter checks the settings, measures the thermocouple or thermopile, watches the flame through a full run, and checks the gas pressure. They also look at the vent connections and the outside cap for leaks, blockage and wind exposure.

Fireplace repairs for this symptom usually mean cleaning and adjusting the pilot or replacing the thermocouple, thermopile or flame sensor, with parts listed for your model. If the cause turns out to be the vent rather than the fireplace, the technician explains what the manual calls for.

Our gas fireplace repair page covers repairs, and our gas fireplace maintenance page covers the regular service that keeps the pilot and burner in good order.

Scheduling a visit

Our $99 gas fireplace safety inspection is the starting point: a licensed Massachusetts gas fitter does a full inspection, a gas leak check, a wiring and controls check, a safety check and a maintenance check. The one price covers every gas fireplace in your home, cleaning is extra, and your $99 is credited toward any repair.

Same- or next-day visits run Sunday through Friday, 8am to 6pm, in 2-hour arrival windows. Request a time online and we confirm by phone or email, or call 617-915-2647. Bring your shutdown log to the visit.

Related problems and reading

Shutdowns often overlap with these problems.

• Pilot light won't stay lit: when the pilot itself keeps going out.
• Remote not working: when the fireplace ignores the handset or keeps acting on old settings.
• Our guide on how often to service a gas fireplace covers what manufacturers say about yearly service.