The th stands for thermostat and those two wires connect to the thermostat device or in most cases a wall switch that tells the valve to open under normal conditions with the pilot light lit closing the circuit between the two th contacts will open the gas valve and ignite your fireplace s main burner.
Cleaning a ventless gas fireplace.
Diy clean ventless gas fireplace logs 1.
If you see thick black marks on the cloth you have a soot issue.
1 the first thing you will need to do is get a vacuum with a hose and preferably a brush on the end of the hose.
Vacuum the area underneath where the logs were.
Take a clean white cloth and rub it on the ceramic gas logs in the fireplace and on fireplace doors if you have them.
The gas valve often located on the wall next to the fireplace should be.
Make sure the equipment is cool before attempting to.
If the glass has a lot of dirt and grime on it spray the cleaner directly on the glass and rub it off using newspaper.
Ventless gas fireplaces since natural gas burns relatively cleanly some gas fireplaces don t bother with the vents at all simply expelling the carbon dioxide and water vapor into the room around them.
Next take a picture of the arrangement of your logs before removing them.
Spray the cleaner on a dry cloth and rub it in a circular motion on the glass.
This will allow you to place the logs back.
Before you do anything turn off the gas.
Clean the glass covering.
Cleaning a vent free gas log set is a fairly simple task and should be done each year before you light them.
Turn off the gas and electric leading to the fireplace.
Clean up residual dirt around the burner with a vacuum.
2 using the vacuum remove the surface dust from the bottom of the fireplace around the gas log burner then remove the log set from the burner and do the same.
Carefully remove the logs stones and burner and place them on a newspaper.
Ensure gas is turned off.
Locate the oxygen.
Use fireplace glass cleaner to clean the glass covering of your gas fireplace.
The thermocouple on a gas fireplace may eventually become clogged with dirt and soot which can reduce the effectiveness of the thermocouple and may eventually prevent the fireplace from lighting as expected.