HVAC: What Is A THERMOCOUPLE & How Does It Work? (Basic Working Principal) How It Works

What is a thermocouple? A thermoelectric device for measuring temperature, consisting of two wires of different metals connected at two points, a voltage being developed between the two junctions in proportion to the temperature difference.

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[izzybell]

Interesting and helpful lesson. Well explained. Great job JMT. 👍

[sirhandsome]

Tyvm!! Very clear and concise. You’re a good teacher friend!

[shuwatch]

Excellent explanation and video!! I found it because we were having trouble with our pilot light, which explains a lot, as well as the primary fix. What would also be helpful to learn is what happens to an aging thermocouple. Ours seems to be disintegrating — supposing this is due to 6years of constant heat, but that seems unfortunate given its designed use.

[NWCPcbenchmarks]

Thank you I feel like my teacher made this way too complex than it need to be.

So in summary uses 2 metals copper and iron. fuel, air, heat makes the thermocouple energized to hold open the solenoid which always gas to continue to pass threw the orifice so the pilot burner stays on when heat is being called


That's really neat making a system that works and supports each other in a continuous loop.

[alexeytech]

Helpfull info for the industry professinal.

[Pashinski]

I came here for a simple explanation and that is exactly what I got. Great job. I didn't want a 40 minute video. Short and sweet.

[takatastore]

Very good explanation...I'm new to the HVAC industry and this was top notch informative and know I clearly know what a thermocouple is thx to your time and work.... thank you

[djhihlit]

Just subscribed. Quick video with all the explanation needed.

[johneric]

Excellent work, good video footage and voice projection.

[briansims]

Thanks for the explanation, it was very helpful

[nicolerennie]

thank you for sharing your knowledge w us!! well explained👌🏼

[beachbum]

No other video has made the observation that a combination of two different metals plus heat can produce a voltage; (I didn't know that) four minutes plus? A very short brilliant educational video that covers all the relevant points. Thank you, (you just saved me $225-Au, plus a three week wait for a technician; in winter) John Perth Australia (ticked and

[r.shelton]

Very informative and detailed tutorial.I will be subscribing and checking out your other videos.👏👏👏👏

[jbourdier]

very clear and well explained, thanks

[frankrodriguez]

Loved the video..

Quick question thou....

Does the pilot button allow gas to bypass and flow to delight it?

Thank u

[Randylazz]

Pretty cool can you do a demo on Flame Sensors on HVAC system and how to test them👍😎✌️

[dieselrotor]

Too funny ! I've installed many many of these but wanted to know the physical/chemical operational explanation behind one, I click on this and the EXACT same (Honeywell CQ100A1005) thermocoupler is sitting next to Me I just bought LOL ! Thanks for the explanation !

[joerosado]

Thanks for this valuable info

Thank you

[KenyanMangroveWaigi]

Thanks for the explanation. Would have been nice to see you light it. though

[HamariAwaaz-inso]

Very nice video. I have blue seal deep twintank fryer GT46. It is fitted with both thermopile and and thermopile with it gas vales. One of the fryer's pilot is not staying on. When I leave the pilot holding knob, the pilot switches off. I have checked both thermopile and thermo couple. Both are working fine. Please can you advice what else can be wrong? Is that mean the main gas valve has gone? Or any solenoid in the valve has stopped working? Can we replace solenoid or the whole valve needs replacing?