Gas Fireplace Troubleshooting Help

[olds70supreme]

I need help troubleshooting a Heat N Glo gas fireplace. When either the manual switch at the fireplace, or the thermostat are turned on, the pilot lights. You can see a small blue flame in the rear and an electric ignitor runs the entire time. This goes on for maybe 30 seconds, than the pilot turns off. This started happening intermittently, now it won’t light off at all.

When I pull off the control panel I can see the valve behind it., but only a single wire to each of the pilot and main valves. Every troubleshooting guide I can find shows more connections where you can jumper the valve to rule it out as the culprit. There aren’t any more connections on the rear or sides, I checked. Anybody know more about these than I do?

Pics show control panel, gas valve, and a terminal block. Fireplace model is 6000TRXI-IPI, manual was not much help.

 

[p_mori7]

Clean the Thermocouple.

Make sure the Pilot flame is properly heating the Thermocouple. If not, clean pilot Burner and adjust as needed.

If above all OK;

Start by replacing the Thermocouple (just a few bucks).

If that doesn't fix it, replace the Valve.

 

[barks]

Yup, dirty, soothed thermocouple. Have an old toothbrush behind panel to occasionally clean it.

 

[barks]

No "h" in sooted.

 

[Showkey]

Some of the heat n Glo units have a thermocouple and thermopile...........just had to change that unit on mine. Thermopile creates a millivolt signal sends that signal back to the gas valve.

This is what mine looks like..........there are several variations depending on model and year. That cylinder on the right of the pilot is the thermopile.

 

[engineer2]

Three common things that go bad:
thermocouple
thermopile
wiring connections (It's millivolt signals. A "wiggle test" usually nails it)

 

[fteufert]

Clean the thermocouple with a small brass brush.

Use a can of air to blow out the orifice

I do this every two weeks or so to mine and never have issues

 

[olds70supreme]

I took the glass off and fake logs out, this is what I see. The left side is where the pilot line goes, and has a flame when turned on. Of the two ceramic thing, the right is a spark ignitor, the left just glows orange, both turn off with the pilot after about 30 seconds.

The right side looks like twin nozzles for the gas (?). I don't see a thermopile or thermocouple, which if I understand right should be right in the flame path (?). I can't find anything online that resembles this.

 

[olds70supreme]

Picture:

 

[Showkey]

I took the glass off and fake logs out, this is what I see. The left side is where the pilot line goes, and has a flame when turned on. Of the two ceramic thing, the right is a spark ignitor, the left just glows orange, both turn off with the pilot after about 30 seconds.

The right side looks like twin nozzles for the gas (?). I don't see a thermopile or thermocouple, which if I understand right should be right in the flame path (?). I can't find anything online that resembles this.

If the right is the spark igniter........then my guess is the left thing flame sensor. It sends a signal back to the valve to stay on.
If this is true ? Then cleaning the left is thing is your only choice. If that does not work then replacing the part is my next guess.

Heat n glow seems to sell their parts in assembly..........my pilot system came with all the parts on one plate (spark, pilot, thermocouple and thermopile). Yours is a different setup ..........I searched my model number and the parts appeared in a google search. My part was $77 local shop had it in stock, my unit is 20 years old.