Question about Heating & Cooling
I had a similar problem, here's how I fixed it.
1. Shut off gas.
2. Use 7/16 wrench and unscrew pilot gas line from BOTTOM (beneath the unit). Pull it down so you can see top.
3. Turn gas back on and push in pilot button.. does gas come out? If so, then you're pilot is plugged with dust or spider eggs or something. Continue steps below.. if not, then probably valve problem, get a new valve.
4. Shut off gas.
5. Remove logs. and the rear left support plate to access pilot unit screws
6. Take out pilot unit screws so you can access the pilot stack with your 7/16 wrench.
7. Remove the pilot stack.
8. Clean all passage ways. Blow out pilot stack, use a toothpick or paperclip to make sure it is all cleaned out... Make sure the thru hole down below is cleared, and clean and blow out the little cylindrical flow adapter piece.
9. Put it all back together.. Put adapter into place, screw down pilot stack, screw back in pilot unit, screw back in rear support, put logs back into place, push gas line back up into pilot, tighten pilot gas line back into bottom, put glass back on.
10. Light pilot as usual and it might work now.
Posted on Jan 08, 2015
I had a similar problem when turning gas control knob to ON. Mine was a vent free gas log set which uses an ODS (oxygen depletion sensor) style pilot which if the pilot does not have strong enough signal it will short the power from the thermopile which closes pilot and main gas valves.
The solution was to blow puffs of air to clean dust from the tip of the pilot and especially the small air hole on the pilot tube near the tip of the pilot. I used a rubber hand bulb with pointed tip to blow the puffs of air. The T/C voltage doubled from 18 to 40mV and the main flame lit right off when gas control valve was tuned ON.
Posted on Dec 23, 2014
From what you are showing and saying I would say that you have a bad gas valve... Your test B is the most telling in that it pulls the MV's down when you close the wall switch, but the gas valve does not open...this tells me that it is trying but the valve is not opening...
Now... the next problem will be to find that valve... from doing a very quick search, I believe that it is an OEM valve and probably will only be available from the manufacturer or a dealer...
So I would contact your dealer or Vermont castings and try to secure a new gas valve.
If it were a thermocouple problem the pilot would not stay lit...
One other test would be to bypass the wall switch and jumper the gas valve directly to make sure the wall switch is not the problem...
Posted on Nov 07, 2010
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Posted on Jan 02, 2017
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