24“ 750Millivolt Thermopile Generator Q313A for Propane Natural Gas Fireplace, Deep Fryer,Furnace, Water Heater Parts Pilot Burner Assembly Replacement

Perfect fit for my Kozy Heat (Hussong) 761DV gas fireplace. Wall switch had ceased functioning. Thermopile tested low on MV output. After replacement, Voile! wall switch functioning again. Total time to replace: 1 hour with most of the time spent removing and then reinstalling the fireplace glass and logs. No idea on longevity of this replacement (original lasted 20+ years).

I ordered this product online when i figured out that it was the problem with my gas fireplace. would not stay lit and would not fire up. Received very quickly in perfect condition, I installed it in about 30 minutes and fireplace fired up immediately and is still working great after a month or so. this product was a perfect replacement for the OEM. I saw a few competing products online and they were less money but I decided on this one even though it was a little higher price. it seemed to be the best quality and it is working great.

Used it to rebuild Rheem performance platinum water heater pilot assembly. Off the shelf the brass sleeve at the back of the thermocouple body is too thick and cannot fit the pilot assembly tube. I had to grind 0.45mm of the sleeve diameter. The good news is the crown fits perfectly and the length of the body when inserted is almost exact. The result can be seen on the attached picture and the rebuilt pilot assembly works with the common Honeywell gas valve just fine. Note that the piezo igniter never fails and Rheem sells the complete assembly for $250. Of course, you can buy OEM from amazon for about $65 but I thought 15min of tweaking is worth it. To grind the brass sleeve uniformly, put the thermocouple body in a drill chuck, hold a piece of 120 grit sandpaper with the other hand and turn the drill at about 50 rpms. It will take about 8-10 min to grind the sleeve sufficiently.

Works as advertised

I have a Heat-n-Glo fireplace that would not turn on after about 13 years. The pilot lights, but the fireplace won’t turn on. After doing some research, I found this condition is usually caused by a faulty thermopile. Thermopiles usually last about 10-15 years. An easy way to check is to measure the voltage with a voltage meter with the pilot lit (heat produces the voltage). My old one was producing about 197 millivolts, it should be anywhere from 500-750 millivolts. I installed the new one in about 45 mins, let it warm up, measured the voltage, and it was at 685 millivolts. I flipped the switch, and the fireplace turned on for the first time in 3 years. My fireplace repair technician couldn’t get out until Feb 1st, so now I have a fireplace for the winter.