You may have a few sensors, one may be a thermopile that energizes the pilot. It is a very thin but long bulb located in the pilot flame. Then you may have something called a thermopile which is also located in the pilot flame that energizes the main gas valve. It is a larger diameter bulb and will have metal wrapped wireg going to the gas valve. If the pilot stays on but the flame goes out under the logs, change your thermopile and look for a bad connection at the gas valve or switch. If both the main burner and the pilot goes out you may have a gas valve problem or a plugged vent pipe. If the flame just disappears it is most likely a gas valve. If the flame changes colors and lifts from the burner, that is a sign of a plugged vent. Good luck.
Mike, open up the heater to get fresh air to it and run it. If the air intake has a blockage, the unit wioll run longer than it did. If the exhaust is blocked, you will smell the burnt products coming out. Not sure how to access your venting but I would have someone look into it very soon. Do not run the heater with it open.
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Therinnaiguy - Thanks for the response and I have a follow up comment adn question.
I'm having a similar problem with a Heat'n'Glo fireplace in a new house I just bought. Fireplace lights but goes out after 10-15 seconds .. and yes I think on mine the flames do go all blue and lift up as it extinguishes from right to left.
My fireplace has the Direct Spark Ignition (DSI) so there is no pilot light. Besides the igniter connecting to the DSI module below, there are not any other sensors connected (unless there well hidden or one is wrapped in the igniter).
The LED on the DSI module blinks fast when turned on, which indicated "Normal Operation. Call for Heat." Before all the flames go out I can hear the igniter try to relight a few more times.
Any additional thougths on the problems? What should I do to ensure that the vents are not plugged or anything?
Hi Therinnaiguy (and others with this problem) - Thanks for the reply! I cracked open the glass on my Heat'n'Glo fireplace, started it again, and it now stays lit indefeinitely. The flames are no longer all blue and do not "lift up."
I didn't smell anything burning too strong, but at least I now know the problem is either with the intake or exhaust vents. I will check those or have them cleaned and then hopefully I'll finally have everything working again. Thanks again!
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Even though its electronic ignition (remote) it still lights a pilot we sell heat n glo's and i service all models never seen one with out a pilot, and the pilot usualy lights first to light the fire and remains a light to send fire signal to thermocouple interrupter block (which is at back of valve a brass coupling nut that has two wire goin into it), and is usually lighting when that beeping sound is going then when that stops you here the valve opens and flames light up so i would firstly check the thermocouple interrupter block and pilot assembly then maybe you're valve or module box, also if you are looking at this heater there is a manual to tell you what parts are in heater which i think you should read first considering its a gas heater you shouldn't be looking at it if you don't know about the pilot which always goes while fire on!
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I don't believe I have a vent problem or a gas valve problem. The control module has no connections to any sensors in the burning chamber. The system has an electronic ignition so there is not pilot. The only connection to the burning chamber is via the high voltage wire to ignite the gas so I am assuming they use this line as the flame detect also, this is a guess. The module blinks twice fast, which is a sign of the timeout. All the time the flame is on, the module is operating the ignitor.
Any more thoughts?
Jim
It's been a while since this was posted, but I am now having the same issue. Were you ever able to determine what the problem actually was? I checked the venting and cleaned everything. I put everything back together without the grate and ceramic log set to see things more clearly. When I turn on the switch, I can hear the gas valve open and then the igniter generates a spark across the two probes. The burner ignites and everything looks normal, except the igniter continues to spark. After about 5 seconds, the spark jumps from the left probe downward to the floor of the chamber instead of across to the other probe. After about 5 more seconds the whole thing shuts down. I also noticed that a wafer thin layer of top the of the ceramic insulator has flaked off and that there is also a little bit of rotational movement of the probe inside the insulator.
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