Pilot light is difficult to light, once lit, when gas valve turns on, pilot and flame goes out, but the gas continues to flow. I cannot use my heater as long as this problem exists. I have cleaned the Pilot tube and burner unit. I have a feeling that the problem exists in the thermocouple, but the part is not listed as a replacement part. I would be willing to replace the entire burner unit, but need a supplier. Does anyone have an 800 number I can use to order parts?

The Little Giant units use a Unitrol gas valve very similar to a water heater in the home. #1,urn the Unitrol gas valve to the "PILOT" position to ignite the pilot. Depress the plunger and hold it down then push the spark igniter button until you can see the pilot flame ignite.
You have a lit pilot so this is not a problem for you.
The pilot light stays on continuously by design.
Once the pilot flame is established, you then turn the on/off/pilot valve to the "ON" position and set the thermostat to the desired temperature range., it should then fire its main burner until the desired temperature is reached. Once the temperature is reached, the main burner will shut off and the heater will go into a standby mode with the pilot flame still burning.
If you have turned the pilot valve to on and set the temperature high, it should come on, if not a new gas valve is required, they can be very difficult to replace due to rust.and most cases require a new unit,

First locate where to light pilot. You can do this by following thin aluminum colored tubing from control valve to inside heater.In general on top of your gas control valve is a knob. Turn indicator of this knob to pilot and depress knob. This will start gas flow to pilot at end of thin tube. Hold this knob in the depressed position and light pilot. DO NOT release knob for 30 -45 seconds. Then release knob and pilot will remain lit. Then turn knob to on position. If pilot will not stay lit you may need a new thermo coupler, which senses heat from flame to keep pilot gas flow open.
Good luck

Is the thermocouple secure, routed properly, no kinks, no sharp bends? Is the end of the unit properly aligned so the hottest part of the pilot flame is hitting the unit. Did you hold pilot switch in the light position for at least 30 seconds, before you set the gas valve to on? If all above OK, try this. Light the pilot using barbeque lighter once it lights keep the lighter on the t-couple for 30 seconds, then set the valve to ON and keep the lighter where it is. Once the main burner lights, remove the lighter. If the burner and pilot go off, your gas valve is bad.

If it is this heater, then you must:

1- turn the toggle switch to the ON position.
2- Turn the gas valve dial to the PILOT position.
3- Depress the pilot button while pressing the ignitor until you see a flame. Continue to depress the pilot dial for about 30-60 seconds.
4- let go of the button, and the pilot flame should stay lit. If it does , then turn the gas valve dial to the ON position.
5- Set the temperature and your done.

First, turn off the gas valve for at least 5 min and ventilate the room. Most wall heaters are lit the same as a water heater. Find a red button to push or turn the gas valve knob to the pilot position. While pressing the red button or the gas valve knob, hold a match to light the pilot flame. After it lights continue holding the knob for one or two minutes. If the flame goes out when you release the knob the thermocouple is probably bad.

I have the exact same model with the exact same problem. Did you ever figure out what the problem was? I just picked up a new gas valve, but maybe i should check the flame sensor first. In my systems case the electronic ignition fires, which lights the pilot, but it keeps firing even though the pilot light is lit. So I think it could be the flame sensor, how do I remedy that or check it out. I would like to check this out first before dropping in the gas valve, cause they arent cheap and I can still return it before its installed.

You may have to get a new thermocouple.

This is a small copper tube that goes from the pilot light area to tha gas valve.

It feels the heat from the pilot and keeps the gas valve open for gas to flow to the pilot or to the logs when in the lit position.

Without the gas valve will stay closed.

Hello KJGreen, It sounds, based on your description, as though the thermocouple is faulty and should be replaced. If the pilot light stays lit and you've left it on for several minutes before turning the knob on to light the log set, then that indicates that the thermocouple is bad.

The thermocouple is a safety device (heat sensor) designed to stop the flow of gas to the burner in the event the gas flame goes out and the pilot goes out. The sensor will only allow the gas valve to open once it has reached the preset temperature.

To confirm that the thermocouple is defective, I would light the pilot light and allow it to remain lit for up to 10 minutes before I attempted to turn on the log burner. If, after 10 minutes, the log burner still won't stay lit, then you know that the thermocouple needs to be replaced. Otherwise, the burner should light, since after 10 minutes, the sensor should be hot enough to signal the gas valve to open.

If you are going to have this replaced, please make sure you use only an approved supplier, since an incorrect replacement part could cause an unwelcome malfunction of the gas log burner. Safety should be primary when dealing with open flame burners.

Hope you find this Very Helpful and best regards!

You have a white scale buildup in the gas valve outlet blocking the main gas flow. Take the valve apart and clean it.

You pilot ignator is plugged.I take a small wire and run it in the hole every year and I also Blow the heaters out real well with air.THis has always worked far me.I need a phone number or email address to Pro Com because i'm having problems with a new one i just bought and I can't find the papework.Could you pleas eif you have this info email it to me
Good Luck
Jay
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