The pilot light on my furnace (propane fired AO Smith boiler) occasionally goes out (perhaps once or twice per month). I have replaced the thermocouple but the problem persists. Any help would be appreciated. Denny.

Could be a draft, I have had this problem before and removed pilot or blow compressed air through the line to clear. Then you can use a metallic foil tape to seal any would be culprits of draft blowing the flame out, it doesn't take much.

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Originally Posted by cgregory67

Could be a draft, I have had this problem before and removed pilot or blow compressed air through the line to clear. Then you can use a metalic foil tape to seal any would be culprits of draft blowing the flame out, it doesnt take much.

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Thanks, you may be right. I've noticed that the pilot flame most of the time acts like it is getting a strong breeze but it's not clear how to block it. At one time there was a fine mesh screen around the pilot but that has decomposed. I haven't found where to purchase a replacement.

Make sure the pilot orifice is clear of all debris.