We have a brand new Empire MV145 heater, the pilot light does not reach the thermocouple and does not stay lit when control knob is released. The service man has bled the line and checked the fuel pressure. Adjusting the small brass screw per the troubleshooting instructions does not remedy the situation. Heating the thermocouple with a separate flame allowed the heater to fire up.
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If you try but the pilot won't stay lit, you probably have a bad thermocouple. It is a small probe located in the pilot that has either two wires wrapped in a metal jacket going to the gas valve or one copper tube also going to the gas valve. To get to it, you will have to open up the burner chamber and drop it out. Take the thermocouple to a good hardware store or fireplace shop for a new one.
are you sure the problem is with the thermocouple? is the pilot sharp and blue? it is unconnon for the magnet in a gas valve to go bad but it does happen. place the thermocouple in the valve and with it in front of you heat it with a match or lighter for 30 sec. now try and light the pilot quickly. if it lights the the problem would be the pilot, if not then the valve. is this a milivolt system or hydrolic t stat.
Look at your thermocouple. Is it glowing red from being heated by the pilot flame? Is the pilot flame blue or yellow? You may have a dirty pilot orifice that is not heating your thermocouple enough to keep it lit after the burner cycles off. A yellow flame will eventually burn the tip of the thermocouple, which causes more frequent problems and eventually it will not work at all. If you have a can of compressed air with attached straw, use it to blow out the pilot orifice (with the gas off) where the pilot flame usually burns. Then examine the tip of the thermocouple and see if it is still round and smooth. Jagged or irregular tips mean it should be replaced. A blue pilot flame and a new thermocouple should do it. Hope that fixes it for you. Douglas
If your pilot light will not stay lit when you release pilot light button then chances are that your thermocouple is bad. Make sure that the tip of thermocouple is directly in line with pilot light. Tip of thermocouple should be cherry red if it is properly placed. If pilot will not stay lit then replace it. If you aren't sure about placement of thermocouple you can heat thermocouple with a seperate heat source. If you do this and pilot light stays lit then reposition thermocouple in pilot flame. If it still won't keep pilot burning then replace thermocouple. Hope this helps. Thanks.
The thermocouple is what tells the gas valve to supply or not supply gas. Several things can cause the thermocouple to malfuntion.
1. pilot light jet is clogged and will not allow the pilot light to reach and heat the thermocouple. Repair by cleaning the pilot light jet out.
2. corrosion on the thermocouple which will also not allow the flame from the pilot to heat the thermocouple properly. Repair by sanding the thermocouple lightly with sandpaper
3. Thermocouple is bad and needs replacement.
If the thermocouple is being well covered by the pilot flame, then it sounds like the thermocouple or thermopile is bad (a thermocouple and thermopile both perform the same way, but are entirely different devices. I am unsure which yours has. Also, make sure all connections from the t-couple of generator are snug tight to the gas valve. There may also be a temperature sensor that has tripped that prevents the pilot from remaining lit. Follow the thermocouple/thermopile tubing to locate any inline sensors that may be open, preventing the signal reaching the gas valve.
Let me know if I can help more. I have not been able to find any information on this specific unit, so will have to speak in general about what to look for.
The thermocoupler is no good. It's that bulb sitting in the pilot flame. when it goes out it shuts everything doen in the main valve. It has to be kept hot by the pilot, that's how it know whether or not it is safe to open the main .
You need to replace the pilot safety switch which is usually a Thermocouple. It is connected by a thin tube from the gas valve to a bulb near the pilot burner. It should be available at Home Depot or online.