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Old 01-22-2019, 09:05 PM   #1
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Heat n glo


Hello, we have bought a house built in 1998. It has a heat no glo fireplace controlled by a wall switch. When you flip the wall switch sometimes it lights and sometimes it doesn't. When it does light, the fire will randomly go out and re-ignite. Sometimes it will stay lit for a few mins, sometimes just seconds. The pilot light never goes out, just the flame around the logs. I attached a video, it's at about 1:20, is an example. But it usually goes all the way out.
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Old 01-25-2019, 11:02 AM   #2
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Re: Heat n glo


when was the last time this unit was dis-assembled and cleaned? These need regular maintenance
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Old 01-25-2019, 12:40 PM   #3
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Re: Heat n glo


That device which is in the flame of the pilot light is a flame sensor. The flame sensor not only tells the gas valve that the pilot light is burning and it is OK for the gas valve to open for the burner, it tells the gas valve that the burner is actually burning and to stay open. Due to oxidation the flame sensor can fail. Sand the flame sensor with 120 grit sand paper.
If you don't have a separate flame sensor then the heat and glow is also acting as a flame sensor. Replace it.


This is a standard replacement item. I have found Tribles Appliance to be a reliable source for such items and always extremely helpful. Call 1-800-TRIBLES (874-2537) for location nearest you.
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Last edited by hkstroud; 01-25-2019 at 12:53 PM.
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Old 01-25-2019, 04:30 PM   #4
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Re: Heat n glo


standing pilot fireplaces have thermocouples/powerpiles, not flame sensors. they don't need to be cleaned.

if the thermocouple or power pile is weak, there could be enough power to hold open the pilot valve but not open/keep open the main gas valve.

dirty pilot orifice, electrical connection issue could cause this too.

there's a way to monitor the voltage be outputted as well as what's being applied to the valve, it should be under a volt stay high enough to keep the valve main open when you turn it on.
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I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.

Last edited by user_12345a; 01-25-2019 at 04:48 PM.
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