troubleshooting an issue with my gas fireplace revised addition

**Looking for some insight/suggestions to address a problem concerning my propane gas heat and glo fireplace that has a pilot light assembly with both the thermocouple and thermopile. On the recommendation from my technician I replaced my whole pilot light assembly due to a pilot light flame and thermopile issue. My problem lies with the flame decreasing when I switch from the pilot mode to the on position. In pilot mode the pilot lights up with no problem and a very strong flame which engulfs both the thermocouple, as well as, the thermopile. As I move it over to the on position the flame starts to decrease. I can move the knob slowly towards the on position enough for the main burner to engage, but if I move it over enough to fully open up the main valve, the flame no longer covers the thermocouple and/or thermopile enough to keep the millivolts needed to properly run the main valve. the result is a clicking sound and shut off of the whole system. Also, I notice that the knob on the control valve for the main burner which regulates the flame itself has no impact on the intensity of the flame I can move it from the low position to the highest with no increase in flame. Since it is a brand new pilot light assembly and the millivolts from the termopile are strong, I believe the problem lies in the gas valve itself. Wall switch checks out fine and all the connections seem to be in order. Any insight would be welcomed. Thanks, Tom******__**
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Gunner wrote:

Gas supply line valve open all the way ? Pipe partially blocked ? Sounds like low gas pressure if the pilot goes low/off when the main burner is on . The fact that the control knob makes no difference in flame size is also a clue . Or it could be a bad gas valve assembly - but I'd check the gas pressure before I replaced it .
--
Snag



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On 01/28/2016 1:49 PM, Terry Coombs wrote:

...

+1
It's propane so I'd add to the above any chance't the supply tubing has been crushed somewhere or foreign obstruction (which is kinda' covered above).
It's clearly a supply issue -- possibly the bottle/tank regulator is bad or not fully open as also noted above.
--




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replying to Terry Coombs , Gunner wrote:


snag,
Thanks for the response. I have contacted my propane supplier who will come out next week and check the regulator on the tank, gas pressure flow and gas control valve. What started out as a simple fix (change out the pilot light assembly) has turned into a troubleshooting nightmare..So much for trying to address the issue yourself. Without the proper diagnostic tools, It's difficult to determine cause and effect. I now have the unit on very low (pilot knob opened enough to ignite main gas valve) but very little heat output. Could never figure out why the flame decreased so much (to the point where the thermocouple and thermopile was unable to get enough heat and generate the electricity needed to keep the main valve and pilot light going) Hopefully I can put this issue to rest next week. Thanks again for the response.
Tom
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