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Old 10-08-2012, 06:48 PM   #1
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is this a thermocouple?


Everything I've read about thermocouples are they are copper but I don't have copper in here. Its the pipe coming out of this valve right? Just for terrence I've got a heil nuge075bg01

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Old 10-08-2012, 06:51 PM   #2
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is this a thermocouple?


No. I see no thermocouple anywhere in that picture.
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Old 10-08-2012, 06:52 PM   #3
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is this a thermocouple?


Good thing I didn't take it off then. What would be the gray tube coming out if the valve?
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Old 10-08-2012, 06:54 PM   #4
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is this a thermocouple?


I'm having a hard getting pilot to keep reigniting. Would like to set thermostat to auto
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Old 10-08-2012, 07:56 PM   #5
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is this a thermocouple?


I believe that gas valve is an intermitent pilot valve. The tube you see is the pilot supply tube. There should be a spark ignitor to light the pilot.
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Old 10-08-2012, 07:59 PM   #6
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is this a thermocouple?


If you had one this is what it'd look like. It would not be by the gas valve where you pictured but rather in the burner compartment.

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Old 10-08-2012, 09:58 PM   #7
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is this a thermocouple?


Moved to HVAC forum.
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Old 10-08-2012, 10:21 PM   #8
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is this a thermocouple?


The unit is not equipped with a thermocouple. Has electric spark or glow coill ignition with a flame rod, flame sensor which completes voltage to gas valve when the pilot is lit and the sensor (flame rod) is working and senses the existence of the pilot flame. So, pilot should light first then, as long as the flame rod senses the flame the gas valve will open. If pilot lights then goes out then the sensor/flame rod is dirty or defective..try cleaning first..It is located next to the pilot assy and looks like a little porceline holder with a metal rod attached..the metal probe is positioned to have the tip in the pilot flame

Let us know if the pilot lights

OR..could be a "power pile" which is similar to a thermocouple but has two wires from it to the gas valve..

Last edited by techpappy; 10-08-2012 at 10:25 PM.
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Old 10-08-2012, 10:57 PM   #9
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is this a thermocouple?


I believe I see a grounding wire on the pilot base assy which says its spark ignition.
No thermocouple....Uses rectifyer..flame rod.

Last edited by how; 10-08-2012 at 11:20 PM.
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Old 10-09-2012, 06:47 AM   #10
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is this a thermocouple?


Techpappy you got it the pilot lights then goes out. I had a buddy out like two years ago and he cleaned it out. I'm not really trying to ask him to come over again for this. Is this something I could clean myself any how tos on the Web?

Also thanks for moving to the HVAC forum, whoever did that
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Old 10-09-2012, 08:36 AM   #11
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is this a thermocouple?


The flame rod looks like a wire that stcks out into where the pilot flame is burning when lit.
They can sometimes be a bit of a hassle to get to. There will be a single wire coming from the end of it. It will also have a white or light grey ceramic insulator around it. Use a piece of fine steel wool to shine it up. Also check the connections to make sure there is no corosion on the connections on both the sensor and the board it is hooked to
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Old 12-29-2012, 05:34 AM   #12
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is this a thermocouple?


So here is the thing. I did nothing to clean anything I just took the cover off the front of the furnace and the pilot lights regularly...now I know this isn't right but it's been working for the past two months. I finally have time to fix it. what should I try first? Cleaning the flame rod?
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Old 12-29-2012, 07:16 AM   #13
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is this a thermocouple?


Yes, but carefully.
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Old 12-29-2012, 08:50 AM   #14
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is this a thermocouple?


only two leads off valve...standard redundant valve.
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Old 12-29-2012, 09:00 AM   #15
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is this a thermocouple?


...jjjjj

Last edited by hvac5646; 12-29-2012 at 10:30 AM.
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