Brands & error codes
Mendota fireplace won't light: lockout and blinking light
Newer Mendota gas fireplaces and inserts use electronic ignition. When the pilot fails to light, the system locks itself out for safety, and it won't respond until it's reset. Here's what that means and what to try first.
What lockout means on a Mendota
Lockout is a safety mode. After failed ignition attempts, the control shuts the gas off and stops trying. Mendota's manual says that if the ignition system goes into lockout, wait at least five minutes before trying to relight. It also says that if lockout happens often, it should be diagnosed, and that it should never be assumed the ignition control itself is faulty without a proper diagnosis.
Blinking red light on the control module
Mendota's FV44i manual lists a SIT ProFlame II module, and those modules flash a red light to report problems. Three repeating blinks mean lockout, and one means the backup batteries are low. See Proflame 2 blinking red light for the full list. Older Mendota models may use a different control, so check your owner's manual.
Two safe things to try first
- Batteries. Mendota says to change the remote batteries at least every six months (a battery icon shows on the remote's screen when they're low). If the unit has a backup battery pack, put fresh AA batteries in that too.
- Wait, then try once. Turn it off, wait at least five minutes, then try lighting it again with the remote. If it locks out again, stop.
Cold-weather tip from Mendota: the manual says to run the pilot in continuous pilot (CPI) mode in the winter months, when daily highs stay at 50°F or below. A warm flue helps the fireplace draft and helps prevent lockouts. Your remote's MODE button switches between CPI and IPI; the manual shows the steps for your model.
If it keeps locking out
Mendota lists annual service that includes cleaning the pilot flame sensor, the spark igniter and the pilot hood, and checking the burner area, which insects can nest in. Frequent lockouts usually trace back to one of those areas, to gas supply, or to venting. Those are jobs for a trained tech, not a homeowner.
A quick video call is the fastest way to find out which one it is. Show the tech the control light, the pilot when you try to light it, and the rating plate. They can pinpoint the cause and tell you whether you need a part, a service visit, or just a settings change.
Common questions
How do I reset my Mendota fireplace after lockout?
Mendota's manual says to wait at least five minutes after a lockout before trying to relight. Turn the fireplace off with the remote, wait, then try once more. If it locks out again, stop and have it diagnosed.
Why does my Mendota fireplace lock out on cold days?
Cold air in the vent makes it harder for the pilot to establish draft. Mendota recommends continuous pilot (CPI) mode during winter months when daily highs stay at 50°F or below, which keeps the flue warm and helps prevent lockouts.
What does a blinking red light mean on a Mendota fireplace?
Mendota units that use a SIT ProFlame II module report problems with a red light: three repeating blinks mean lockout and one means low backup batteries. Check your owner's manual, since older models may use a different control.
Related guides
Proflame 2 blinking red light
One, two or three red blinks on the control module. What each one means and what to do first.
Read the guidePilot won't light
Clicking but no flame, or no spark at all. The usual causes, in order.
Read the guideRegency fireplace won't light
Pilot goes out on cold days, then it won't respond at all. Usually a cold start and lockout.
Read the guideRemote not working
Batteries, switch position, then re-pairing. Steps from the manufacturers.
Read the guideSources
- Mendota FV44i Décor Gen 3 installation and operating instructions (85-03-01060): lockout, CPI mode, batteries and maintenance
- SIT Group, Proflame 2 IFC control board: use and installation instructions (9.957.103, Oct 2018): lockout, reset and red LED diagnostic codes
Brand names belong to their owners. Fireplace Helpline isn't affiliated with or endorsed by any manufacturer. Steps and codes vary by model and year, so always check your own owner's manual.