No Hot Water – How to Replace a Thermocouple



it's very easy to change the thermocouple on a hot water tank what we're going to do is we're going to loosen the nuts to the thermocouple we're going to loosen the nut to the burner tube and also to the pilot tube we're going to use an adjustable wrench with smooth teeth that way we don't do damage to the soft material once we loosen all three we're going to pull out the whole burner assembly once we pull out the burner assembly it's easy to knock off all the rust and deposits that build up what this allowed to happen is this will allow us to get a better flame also once we get the burner assembly out we can then remove the thermocouple by just applying some pressure there's a fitting that holds it inside the bracket here putting in the new thermocouple is very easy all we do is take new thermocouple we push it back into the bracket and there's usually some type of compression fitting that holds it if it doesn't have a compression fitting some have a nut that pulls up and you put in place like that but most are going to have a very simple compression type fitting so it's very easy to put the new thermocouple in place most thermocouples can be any length it really doesn't matter if you excess you can just curl it up and leave it in place like this putting in the burner assembly all we're going to do is put it back in we're going to take all the tubes and we're going to put them back into the gas control like so and then we're going to take the nuts and screw them back in place again we're going to want to hand tighten them because it's very soft material once we tighten it up we're going to put another quarter or so on with our wrench and once they're tight we're going to turn on the main gas valve to the gas control once we have the main gas valve on we're going to turn the knob to pilot we're going to press down pilot and hold a flame to the end of the burner tube and at the end of the pilot tube once the pilot lights we're going to continue to hold down this pilot for about 30 seconds to warm up the thermocouple once the thermocouple is warmed up it's going to send a signal to the gas control that it's on once the gas control is released that knob is released we turn it to odd and it's going to allow a flow of gas to the burner once the burners sucking gas what we want to do is we want to test these three areas on the gas control that we screw down our nuts and we're going to put a solution of water with a little bit of soap in it and if there's any type of gas leak it's going to blow bubbles and it's pretty straightforward that's how we change a thermocouple

21 Comments

  • jose calonge

    April 14, 2019

    Easy, straight forward installation.>>>ur2.pl/1103 We installed this in our 2 bedroom 1 bath cottage in Northern WI and I set this to 120. Water is HOT! Compact and takes up almost no space at all and it doesn't make a single sound. I thought there would be a slight "hum" but you don't even know it's there

    Reply
  • Tim

    April 14, 2019

    Do you have to drain the tank

    Reply
  • Ashley NoName

    April 14, 2019

    Any suggestions for removing the thermocouple from the compression clip? My husband cannot get it loose.

    Reply
  • atomsapple1

    April 14, 2019

    Thanks for the great video! I knew very little about my gas water heater, you made it seem very easy. After we lost hot water, I relit the pilot light, but it died when I turned it on. I heard it may be the Thermocouple and found your video. Paid $11 for the part at Lowe's, cleaned the burner (disgusting), reconnected, lit up like a charm!! Then I noticed the burner wasn't centered underneath. I saw a slot in the middle for the assembly to slide into to secure it. I just disconnected and reconnected after securing the assembly in the slot. That's the only thing I didn't see you cover when you slid the assembly back in. Figured it was important to secure it so I thought I'd share. (Fire and Propane and all…) Saved me a bunch of money and groans from my wife about no how showers. Thank you!

    Reply
  • AJ J

    April 14, 2019

    Awesome, replacement part was $30, free labor for which I was quoted $120. Thanks, you saved me a lot of money

    Reply
  • Ann Parker

    April 14, 2019

    replaced a thermo culper on old rheem water heater due to pilot light not staying lit. Had to give up pushed button and flame would not stay. help!

    Reply
  • Steven Nemeth

    April 14, 2019

    hi, my water heater is an 07 whirlpool model. when i go to light the water heater, it just sparks and doesnt stay lit at all. could thus be the thermocouple or something else? i also heard that on some of these models, you need to buy a whole new replacement "door" if you will. please shed some light.

    Reply
  • La'Mar Young

    April 14, 2019

    Nice…. Did anybody notice the hat changing….

    Reply
  • FIX IT Home Improvement Channel

    April 14, 2019

    +Ivan Cardona Hi, do you have a model Number?

    Reply
  • Ivan Cardona

    April 14, 2019

    Great video!! My heater (A.O. Smith Promax) has a different couple it has some kind of coil. Can I replace it with a standard one or should I order the same one?

    Reply
  • Blue Mark

    April 14, 2019

    Thanks for this easy lesson – an $8 fix that prevented the cost of a service call. And I didn't even need the secret helper who peeks in at 30 seconds.

    Reply
  • RemodelingHQ

    April 14, 2019

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    Reply
  • Josh D

    April 14, 2019

    Do you recommend ever replacing the entire burner assembly (like the circular tray) when you remove it to replace the thermocouple?

    Reply
  • Carlos Black

    April 14, 2019

    Excellent!  Simple, yet thorough.  Thanks.

    Reply
  • Marck Gomez

    April 14, 2019

    Wow youtube vudeos saved lots money. Thermocouples was $12 Bucks at homedepot.

    Reply
  • Scott Beeson

    April 14, 2019

    Is there any concern with alignment when putting the burner assembly back in?

    Reply
  • Otto Yang

    April 14, 2019

    Thanks for making this short and to-the-point.

    Reply
  • Tricia Robertson

    April 14, 2019

    OMG!!!!!!!! I didn't know about pulling the whole thing out!!!!!!!!!!  THANK YOU!!!!!!!!!!!!!! I don't know how many times I've changed the thermocouple without removing the whole burner assembly!!!!!!!!!!!!!!!!!   THANK YOU!!!!!!!!!!!!!!!

    Reply
  • Javier Cortez

    April 14, 2019

    My hot water heater flame keeps going out. I light it up and after a couple of hours it goes out again. Does this mean its time to replace this thermocouple? Thank you for your assistance.

    Reply
  • Justin Hamaker

    April 14, 2019

    Thanks for posting the video.  It made things look a lot easier.  So how many different hats do you wear?  Saw you started with nothing and changed 3 times.  HAHA

    Reply
  • Richard Eaton

    April 14, 2019

    It would have been helpful if I would have known that the main burner nut was left thread. You definitely saved me over a $110 for an $8 part and 15 minutes work.
    Thank you very much.
    Richard 

    Reply

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