Mendota Gas Fireplace Troubleshooting [9 Easy Solutions]

Thousands of homeowners rely on Mendota Gas Fireplace to boil the frigid conditions of their homes. They love it as this fireplace keeps the air warm by removing cold air. Therefore, Mendota ensures high-quality, maximum efficiency, and trouble-free operation in today’s tight home. 

But your fav gas fireplace starts malfunctioning over time just like other electric appliances. Mendota pilot light goes out, fireplace won’t light, stay lit, remote control doesn’t work, and gas fireplace beeping is one of the issues you may go through. 

Today’s guide on Mendota Gas Fireplace Troubleshooting will break down every common issue you may experience and their simple solutions as well. So, stay in tune with us till the end. 

Mendota Gas Fireplace Troubleshooting Guide

Below, we have discussed some Mendota gas fireplace problems and provided their easy solution as well. So, take a look at them when you find your Mendota gas fireplace not working: 

Troubleshoot 1: Mendota Fireplace Remote Not Working

“The gas fireplace remote control is not working.” This is a common issue every fireplace owner goes through. Your fireplace remote will not function as it should be for the following reason. 

  • Batteries may get defective. Generally, batteries will last 6-12 months at normal use. 
  • The power supply from where your fireplace gets the energy may get tripped. 
  • The manual switch of your gas fireplace is set to On position.
  • Out of range
  • Faulty individual button


To let your fireplace remote control function as it does, follow the below steps:

  • Change the batteries with new ones.
  • Ensure the electric circuit you use to plug in your fireplace is functional. If it gets tripped, replace it or try another outlet that works. 
  • Your fireplace remote control will not transmit a signal if the manual switch of your gas hearth is flipped to On position. So, check it and set it to OFF position. Now, try and test your remote control. 
  • Make sure you are within 25 feet of the signal receiver.
  • Sometimes the buttons (on and off buttons) we used frequently start malfunctioning. So, turn on your gas fireplace with its manual switch. If they work, understand the specific button is defective. To fix this issue, call the manufacturer’s support team for help. 

Troubleshoot 2: Mendota Gas Fireplace Won’t Turn On

Your gas fireplace will not turn on if its batteries go down. Therefore, tripped circuit breaker, faulty thermopile & thermocouple, and improper thermostat settings are some reasons behind this issue. 


Simply, change the batteries of your remote control if your Mendota gas fireplace is not lighting. Don’t forget to replace the receiver batteries as well. On the other hand, if it’s a problem with the circuit breaker, replace it with a new one. 

In case of faulty thermopile & thermocouple, you must replace them with a new one. Also, ensure the thermostat setting is in its place.

Troubleshoot 3: Mendota Gas Fireplace Won’t Stay Lit

If your gas fireplace will not stay lit, a faulty thermopile or thermocouple is the culprit behind it.


To fix this issue, inspect these parts of your gas fireplace. Clean them by removing any dirt deposits on them. Then, test them and re-ignite the pilot light. If still your fireplace pilot light won’t stay lit, replace the thermopile and the thermocouple. 

Troubleshoot 4: Mendota Gas Fireplace Pilot Light Goes Out

The pilot light of your Mendota Fireplace goes out if the thermopile and the thermocouple get faulty. The thermopile delivers all the necessary voltage your fireplace requires to run flawlessly. If the output of your thermopile or the thermocouple is insufficient, the pilot light will run out when you release the knob on the gas valve. 


350 mV is the minimum output you should get from the thermopile. The new thermopiles are rated as 750 mV. Replacing the thermopile is a must if you don’t get adequate voltage from it. You should also replace the thermocouple while you are at it. Check this tutorial out if you don’t know how to replace a thermopile on a gas fireplace. 

Troubleshoot 5: Mendota Gas Fireplace Beeping

The Mendota fireplace that operates with remote control has two parts to the remote- hand-help portion and receiver. Both of them have batteries. It will turn off your fireplace if the batteries of your receiver are getting low. The beep you hear is generally the low signal battery. 


Changing the batteries of your remote is quite simple. But the method of replacing batteries of your receiver varies from manufacturer to manufacturer. Take a look under your fireplace and find out the receiver box & change the battery. We recommend you check the manual if you don’t know where the receiver box exactly is. 

Troubleshoot 6: Humming or Whistling Coming from Fireplace Insert

If your gas fireplace makes a humming or whistling noise, don’t go nuts. It’s a normal operating noise and you can expect this noise just from any gas fireplace. When the gas supply flows through gas orifices, your fireplace makes the whistling. 


As you learned this is not an issue at all, you can reduce the noise level. Just turn the High/Low knob on the control to reduce the humming. Also, you can turn the flame down to decrease the fireplace operating noise. 

Troubleshoot 7: A Change in Flame Appearance

A change in flame appearance like too blue or too orange is an issue you may go through when operating a gas fireplace. You will encounter this problem if you fail to set the air shutter opening correctly. Therefore, a blocked air inlet or outlet vent is also responsible for the change in flame appearance.


During installation, make sure you set the air shutter opening at the correct position. Place the air shutter opening at 1/8″-1/4″ if you run your fireplace with natural gas. On the other hand, keep the opening at least 1/2″ open. 

When it comes to a clogged air inlet or outlet vent, release the block by removing carbon, spider webs, and lint. Never allow these culprits to make a colony on and around the shutter area. For more perfection, you can read how to adjust your gas fireplace flame perfectly.

Troubleshoot 8: Thin Black Coating [soot] Forms

Sooting forms on viewing glass is an issue every Mendota gas fireplace user encounters. The soot may form for several reasons, including:

  • Improper installation or air shutter operation
  • Not get enough combustion air
  • Leaky glass gasket
  • Improper log or ember placement


Follow the below steps to fix those issues:

  • Check the gas supplier for correct gas outlet pressure (3.5″ W.C for natural gas and 10″ W.C for LP gas). 
  • Replace the glass gasket if it gets leaked.
  • Call the Mendota service person if the sooting continues.

Troubleshoot 9: Fireplace Won’t Turn on While the Remote Control is Working

If this is the issue you face, we bet your gas fireplace may be in ‘lock-out’ mode. You can’t start your fireplace when the ‘lock-out’ mode remains enabled. 


To reset the lock-out, turn the remote off. Then, turn it on again and wait for two seconds. Next, turn your remote off and turn it on and wait for two seconds. Finally, turn the remote off.

It helps to clear the lock-out mode. Start your fireplace by turning your remote on. If the above steps don’t get any luck, call the Mendota support team for help. 

Mendota Gas Fireplace Maintenance

Regular maintenance will keep your fireplace in good condition. Here we can break down the fireplace maintenance workflow into two sections- Annual and Periodic Inspection. Below, we discuss both of them.

Annual Maintenance:

  • Suck away every deposit and dirt build-up around the control.
  • Check out the condition of the wiring under the burner to see whether they get melted or damaged.
  • Clean the gas fireplace completely. Use an air compressor to clean all burner ports and pilot assembly.
  • Put the logs apart from the unit and remove coals. Then, remove every dirt, dust, and particle on and around the burner and logs.
  • Don’t forget to tidy up the pilot ann underside of the burner.
  • Inspect the glass door gasket and check whether the gasket gets leaked or not.

Periodic Maintenance:

  • Ensure the vent system and the vent cap are open and no block form there.
  • Clean the viewing glass frequently. Never use any abrasive cleaner to clean the glass.
  • Call a qualified service person to check the operation of the pilot before installing the viewing glass. Then, cycle the fireplace burner per lighting instructions.
  • Inspect the pilot flame visually and ensure the visible pilot length is at least 1″ long.
  • Inspect the burner’s rear and front flame periodically. 


Why is my gas fireplace not turning on?

Your gas fireplace will not turn on if its batteries go down. Therefore, tripped circuit breaker, faulty thermopile & thermocouple, and improper thermostat settings are some reasons behind this issue. 

What should I do if I smell gas? 

If you smell gas, do the following things.

  • Don’t turn on any appliances
  • Avoid touching any switch
  • Stop yourself from using your phone in your building
  • Use your neighbor’s phone and call the gas supplier
  • Call the fire department for help if you fail to reach your gas supplier

Why does my gas fireplace keep going on and off?

The thermopile of your gas fireplace allows the gas to flow through the burner system to let your fireplace heat and light. If the thermopile is defective, your fireplace keeps going on and off.


From this Mendota gas fireplace troubleshooting guide, you learned some common issues with Mendota fireplace. We also provided how you can overcome those issues. 

We hope this in-depth guide will help you solve the problems you are going through with your Mendota gas fireplace. If any of the troubleshooting methods don’t work for you, we suggest you call your nearest Mendota dealer to fix the issue. 

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