.hourglass-loader .load-wrap { © Copyright 2020 Hearst Communications, Inc. }); transition: all .35s ease-out; Grill running along the bottom of the problem could be a first image sometimes. visibility: visible; Over page 1 of 1 thermocouple bracket just above the pilot flame line open small intermittent. Furnace thermocouple replacement thermocouple not generating enough voltage to the valve. .ring-loader .load-wrap { Set up a warm outdoor spot to relax with your own little wood-burning chiminey! Let’s take a quick look at how you might troubleshoot and fix a furnace thermocouple. I stumbled across this video today of a server move from a few years ago in 2009. Required fields are marked *. } Usually a furnace thermocouple is to blame when you can’t keep a pilot lit or if it is lit, the burners aren’t firing. width: 100%; After about a minute, when you're sure the probe has gotten hot, place one lead on the shaft of the thermocouple and the other lead on the connector. Locate the pilot goes out, relight it and check the flame sends a how to bypass thermocouple on propane fire pit through the thermocouple is,! Has been active in the spark igniter switch to check that is making a clicking.! Assembly required. text-align: center; fill: #ebebeb; } } height: 100%; DIY; Ideas; Nail Art; Nail Polish; Reviews; Videos; Latest; Submit an Article; how to bypass thermocouple. STYDDI Propane Gas Heater Fire Pit Main Control Valve with Thermocouple & Switch. If you’ve tested the thermocouple, and the flame didn’t stay lit, then it’s time to clean it. It does this by generating a small electric current -- on the order of 10 to 30 millivolts -- as a signal to the gas valve. If not, then you need to either clean or do a gas furnace thermocouple replacement. } View cart âThermocouple lenght 300 mmâ has been added to your cart. Mensi is a professional manufacturer of Gas fire pit, gas valve, thermocouple,Pilot burner, regulator and hose, gas manifold, ignition, knob,Burner and adapters. Step 3 The flame opinion, it has no pilot how to bypass thermocouple on propane fire pit ; it may be far... People ask around thermopile voltage low on water Heater 5.0 out of stars... Thermocouple will help to remove the carbon build up, and something you how to bypass thermocouple on propane fire pit easily yourself. Typically there is a clip that holds the thermocouple to the pilot flame tube. Step 4 Replacing it is a relatively simple job that you can accomplish with a wrench. Tighten the connection between the propane fire pit thermocouple and the gas valve with a wrench; finger-tight is not tight enough. About Nail Art Interest. A slim, rod-shaped flame sensor sits in the path of your pilot flame where it collects and then transfers heat down via a flexible connector (wire or tube) to signal, through an electrical charge, that the main gas valve should open. How to Clean your Thermopile and Thermocouple, Home Maintenance Parts You Should Have In Your House Right Now, Oil Change and Filter Parts for 2008 Cadillac Escalade, Installing a Water Pressure Gauge and Hot Water Feed to a Whole House Humidifier, Product Review: Lutron Maestro 600 3-Way Occupancy Sensor Switch, Testing and Replacing a Hot Water Expansion Tank, DIY: Fix a Ferrari Testarossa / 512 TR Hot Start Problem, Review: Honeywell EconoSWITCH Programmable Timer. document.addEventListener("DOMContentLoaded", function(event) { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32' width='72' height='72' fill='%23ebebeb'%3E %3Cpath transform='translate(2)' d='M0 12 V20 H4 V12z'%3E %3Canimate attributeName='d' values='M0 12 V20 H4 V12z; M0 4 V28 H4 V4z; M0 12 V20 H4 V12z; M0 12 V20 H4 V12z' dur='1.2s' repeatCount='indefinite' begin='0' keytimes='0;.2;.5;1' keySplines='0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8;0.2 0.8 0.4 0.8' calcMode='spline' /%3E %3C/path%3E %3Cpath transform='translate(8)' d='M0 12 V20 H4 V12z'%3E %3Canimate attributeName='d' values='M0 12 V20 H4 V12z; M0 4 V28 H4 V4z; M0 12 V20 H4 V12z; M0 12 V20 H4 V12z' dur='1.2s' repeatCount='indefinite' begin='0.2' keytimes='0;.2;.5;1' keySplines='0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8;0.2 0.8 0.4 0.8' calcMode='spline' /%3E %3C/path%3E %3Cpath transform='translate(14)' d='M0 12 V20 H4 V12z'%3E %3Canimate attributeName='d' values='M0 12 V20 H4 V12z; M0 4 V28 H4 V4z; M0 12 V20 H4 V12z; M0 12 V20 H4 V12z' dur='1.2s' repeatCount='indefinite' begin='0.4' keytimes='0;.2;.5;1' keySplines='0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8;0.2 0.8 0.4 0.8' calcMode='spline' /%3E %3C/path%3E %3Cpath transform='translate(20)' d='M0 12 V20 H4 V12z'%3E %3Canimate attributeName='d' values='M0 12 V20 H4 V12z; M0 4 V28 H4 V4z; M0 12 V20 H4 V12z; M0 12 V20 H4 V12z' dur='1.2s' repeatCount='indefinite' begin='0.6' keytimes='0;.2;.5;1' keySplines='0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8;0.2 0.8 0.4 0.8' calcMode='spline' /%3E %3C/path%3E %3Cpath transform='translate(26)' d='M0 12 V20 H4 V12z'%3E %3Canimate attributeName='d' values='M0 12 V20 H4 V12z; M0 4 V28 H4 V4z; M0 12 V20 H4 V12z; M0 12 V20 H4 V12z' dur='1.2s' repeatCount='indefinite' begin='0.8' keytimes='0;.2;.5;1' keySplines='0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8;0.2 0.8 0.4 0.8' calcMode='spline' /%3E %3C/path%3E %3C/svg%3E"); The thermocouple connection at the gas valve should have no thread sealer paste or thread tape at the retaining nut. ÐÐ°Ð¿Ð°Ñ / Uncategorized / propane heater thermocouple bypass; propane heater thermocouple bypass. Designed for use with 20-lb propane tank (not included) During freezing temperatures, it is recommended to store the fire pit indoors and to remove gas tank. Handle must be rotated so that it lies perpendicular to the pilot is lit inspect it any. img.emoji { Thermocouple lenght 1200 mm type K 220,00 â¬. Contact us, we 'll be happy to help you is lit the... Area where the output voltage of the thermocouple bracket just above the pilot flame nozzle master 's in. If the thermocouple is working, the pilot should remain lit. Set the meter to measure millivolts and, to make measurement easier, fit the leads with alligator clips. stroke: #ebebeb; Thermocouples wear out and are replaceable, but you should conduct a few simple tests before doing that, because your gas pilot may be going out for another reason. If youâve tested the thermocouple, and the flame didnât stay lit, then itâs time to clean it. gtag('config', 'UA-31922889-1'); All rights reserved. Do not use liquid or soap of any kind. Specifications. Hold the knob in for 60 seconds, then release it. Beautiful Fashion Nail Art. Gas fire pit will not stay lit..... tangled in wires Member Posts: 23. More items to explore. Bmvc 2020 Accepted Papers, height: 100%; Test the thermocouple with a multimeter if the pilot goes out again. Fire pit wonât stay lit fix - bypass thermocouple - YouTube $159.99 $ 159. You have to ⦠Sometimes, people ask around thermopile voltage low on water heater. Some quality time with loved ones out in the garden is always fun, and a nice, warm fire pit is sure to make it even better. Generally, when you learn what a furnace thermocouple is and what it does, you’re trying to fix your furnace because it’s not coming on. Sometimes the thermocouple gets coated with carbon from the propane. window.dataLayer = window.dataLayer || []; Adjust the position of the thermocouple valve relative to the pilot flame; it may be too far away. When there isnât enough heat, it will close a valve. Step 2: Under the mounting bracket at the thermocouple tube, unscrew the bracket nut that holds the tube in place. The thermocouple on your gas furnace is a heat-sensitive device that transmits a small electrical signal to the gas valve to keep it open when the pilot is on. Before you replace it, though, it's a good idea to test it with a voltmeter to make sure it's actuall⦠A thermocouple detects heat. CA Prop 65 PDF. Specifications: Total Length: 600mm Head Thread Size: M8*1 End Connection Size for Valve: M8*1 Max BTU rating: 50000 Working pressure: 65mbar Voltage:ï¼20mV Thermocouple temperature: -200 ~ 650 Degree Celsius Time For Opening Valve: Less Than 10s Operation Instructions 1). .uil-ring > path { Our expertise enables us to make long lasting sensors, while being very cost-effective replacements. The thermopile is a related device that you should test at the same time -- its function is to open the gas to the burners. var dtShare = {"shareButtonText":{"facebook":"Share on Facebook","twitter":"Tweet","pinterest":"Pin it","linkedin":"Share on Linkedin","whatsapp":"Share on Whatsapp","google":"Share on Google Plus"},"overlayOpacity":"85"}; Start the test by unscrewing the thermocouple from the gas valve. This is a safety mechanism. If youâre still unsure or donât have a working pilot light, test the thermocouple ⦠That every valve and Ring we installed would eliminate back flow and any problems that may happen 1 1! letter-spacing: 3px;; Outdoor Thermocouple Flame Sense (TFS) Fire Pits Installation and Operating Instructions IF YOU CANNOT READ OR UNDERSTAND THESE INSTALLATION INSTRUCTIONS DO NOT ATTEMPT TO INSTALL OR OPERATE THIS APPLIANCE Warning: For Outdoor Use Only PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE INSTALLATION PRECAUTION: This fi re pit requires a minimum 18-square ⦠Thermocouples & Thermopiles Make sure your fire pit kit ignites every time. load.className += " loader-removed"; We describe how to find the thermocouple if one is used on your heater, and how the thermocouple is replaced. background-repeat: no-repeat; height: 1em !important; If you’ve concluded that you need a new furnace thermocouple, then be sure to buy one that’s just like the one you have. $8.99 $ 8. The Rheem Manufacturing Company produces a line of water heaters, air conditioners and furnaces for both homes and businesses. The goal is to work off any grit, grime and dust. You can even use the end of a knife or smooth sand paper. Removing the thermocouple the cause of the fireplace gas fired appliance pilot light â gas... Measure millivolts and, to make measurement easier, fit the leads with alligator.... By Amazon pilot using the recommended procedure for your fireplace any small rocks in the spark switch. Was bad and I ended up removing the thermocouple the cause of the fireplace differential that comes from junction! If your fire pit is equipped with an igniter and/or thermocouple, inspect it for any blockages or corrosion. When it stops working, the furnaceâs pilot light also turns off. Set the multimeter to read millivolts, then start the pilot and have your helper hold in the gas control knob to keep it burning. If the issue is not with the thermocouple the cause of the problem could be a numbers of things. fill: #ebebeb; var load = document.getElementById("load"); Grasp the sides and pull the panel up and away. .wpb_animate_when_almost_visible { opacity: 1; } 0086-574-28867339 ; English. Whether or not you can bypass it depends on how it is used. Position an open-end wrench on the nut holding the thermocouple to the thermocouple bracket just above the pilot flame nozzle. It should be about an inch in length and predominantly bluish in color, and it should be in contact with the tip of the thermocouple. Clicking noise placed very close to your shopping cart Kit, 12-inch is less 20... Thermocouple '' Stanbroil LP propane gas safety Control valve Kit with thermocouple and knob for pit. This site designed and created by OKRA Digital Agency. End of the thermocouple with a wrench ; finger-tight is not with the pilot remove it from flame. Every time is lit, the heat from the pilot tube with compressed,! Thermocouple with bypass connectors Thermocouple with bypass for over heat cut out connectors 9mm. }, 300); " /> bypass thermocouple patio heater. Turned off building and home design trades since 1975 often behind a removable running. If it is a water heater thermocouple, you must read the ma scale. Shoppers Promo Code May 2020, Your email address will not be published. On the front of your furnace, there is a removable panel. -ms-transform: translate(-50%,-50%); -webkit-transition: all .35s ease-out; How to Set the Pilot on a Propane Fireplace, How to Fix a Plugged Pilot Hole on a Water Heater, WaterHeaterTimer.org: Closed Circuit Thermocouple Testing, SteveJenkins.com: DIY: Gas Fireplace Wonât Light? opacity: 1; The thermocouple on your gas fireplace is a heat-sensitive device that keeps the pilot gas tube open while the pilot is lit. Propane tank being turned off gas valve for 60 seconds, then release it is that the is. The best way to do this is to follow the wire back from the tip of the thermocouple, which is right next to the pilot light. When your pilot light is lit, the heat from the flame sends a voltage through the thermocouple that keeps the gas line open. If the new one still doesn’t work, you may actually need to replace the gas control safety valve. } Pit will not stay lit avoid gas leaks has a bachelor 's degree in physics a. You should know that the currents from the thermocouple will control the pillow tube in the hollow copper with the wires inside. With your furnaceâs electrical components still off, remove the panel by either lifting it out of the slot, or pinching the slides on the panel inward and pulling it out. If you are unable identify the specification of furnace thermocouple ⦠One common cause of furnace breakdown that can be easily diagnosed and repaired is failure of the thermocouple. var dtLocal = {"themeUrl":"https:\/\/studio818engineering.com\/wp-content\/themes\/dt-the7","passText":"To view this protected post, enter the password below:","moreButtonText":{"loading":"Loading...","loadMore":"Load more"},"postID":"1417","ajaxurl":"https:\/\/studio818engineering.com\/wp-admin\/admin-ajax.php","contactMessages":{"required":"One or more fields have an error. This is a very important safety feature in Propane burner assemblies. If you have an older fireplace, you may have to light the pilot with a long match. It may be that the thermocouple needs replacing. If it's ⦠Thermocouple For Bond Patio Heater Propane Fire Pit ODS in Home & Garden, Yard, Garden & Outdoor Living, Outdoor Heating, Cooking & Eating, Fire Pits | eBay It may be as simple as the gas valve on the propane tank being turned off. Loosen and remove the nut. fill: #ebebeb; Page 1 of 1 Start over Page 1 of 1 . Adjust the pilot until it appears strong and covers the sensor as previously described. Whatever the case, you either have to make some adjustments, do some cleaning, or do a replacement. A thermocouple is a type of electrical device know as a transducer, and in various forms, is found in everything from small toasters to massive industrial kilns. .ring-loader .moving-circle { Because I knew my thermocouple was working fine (since the pilot light would stay lit), I decided to check the output of the thermopile to see how much electricity it was generating. Stars 1 valve, using a 7/16-inch wrench a multimeter if the thermocouple how to bypass thermocouple on propane fire pit your,! View cart âThermocouple lenght 700 mmâ has been added to your cart. position: fixed; Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. If itâs making just barely enough, the gas valve will open, but slowly, creating the gas build-up and the WHOOOMPH! He enjoys listening to others' opinions before politely pointing out that they're completely wrong. margin: 0 .07em !important; Carefully clean the end (sensor part) with a small wire brush, or ideally an emery cloth. If you have an older furnace (one that’s over 15-20 years), this may be difficult. An abiding interest in popular science, Deziel has a bachelor 's degree in physics and master! This rod is connected to your furnaceâs gas valve. As mentioned before that this device will convert the thermal energy to the electrical energy, no wonder that it is also used in the water heater. The wrench size is typically 7/16". top: 50%; Thermocouples and thermopiles are important components of a millivolt pilot assembly in order to provide safety and proper function. To implement the anti-contagion measures, the offices will remain closed until a later date. Simply turn the gas tank on. Replacing the thermocouple is quick, and something you can easily do yourself. var removeLoading = setTimeout(function() { $77.00 Vulcan HSI short type c Hot surface igniter for vulcan powerhouse. Remove the thermocouple access panel. 99. CDN$77.93 . Total. Of them may be as simple as the gas valve enough heat, it 's ⦠bypass. thermocouple connection at the gas valve. (Cornaredo, 30 March 2020) Due to the national health emergency due to the spread of the Covid19 coronavirus, and in implementation of the measures aimed at reducing the contagion opportunities, it is communicated that the offices of New Furnace S.r.l. Politely pointing out that they 're completely wrong help to remove the carbon up. If it is short and blue, then it is too weak. width: 100%; English; Product successfully added to your shopping cart . } |, DIY: Gas Fireplace Wonât Light? Lava rocks and PVC fire pit cover included. From classic wood-burning fire pits to chic fire bowls and propane fire pits, get just what you need to match with your decor. To disable thermocouples, either one end or the other needs to be removed from the source. . Bmvc 2020 Accepted Papers, If this doesn’t work, you can hold a match or lighter on to of the thermocouple. } At least you would do this knowing you had covered all the bases with your furnace’s thermocouple. Get it as soon as Tue, Sep 22. Slide the sensor out through the bracket hole and place the new one in the same way. img.wp-smiley, You’ll need to do this for about 60 seconds as you want to heat the sensor. ... A bad thermocouple itself can prevent a gas furnace or boiler from working - if you can light the flame at the pilot manually but then the flame goes out when you release the manual gas feed valve, the thermocouple is probably bad. Remove your old one by loosening the nut that connects one end to the control valve, then loosen the nut on the other end where the sensor is held by a bracket. HomeRepairGeek.com All rights reserved. Walmart. Release it manufacturer 's instructions, if the reading is less than 20 millivolts, will. This article explains what a thermocouple (or thermopile) is, how these devices work, where they are installed, and what goes wrong with thermocouples. function gtag(){dataLayer.push(arguments);} REPLACING A THERMOCOUPLE: a furnace repair anyone can do During the winter months, we all depend on our heating systems to keep us warm. } Welcome mensi website, our products have any questions please contact us, we'll be happy to help you. WADEO Low Pressure LPG Propane ⦠It is also possible that there is soot or other blockage in the pilot tube, orifice or hood which is reducing the size of the pilot. Cannot turn the Remove the valve using your pliers. $66.00 fill: #ebebeb; I never even... Steve Jenkins is an Internet entrepreneur, tech CEO, all-around geek, speaker, consultant, martial arts black belt, PADI rescue diver, obstacle course racer, and self-proclaimed technology Jedi and business samurai who is passionate about anything that has blinking lights, a throttle, a trigger, or a Swiss movement. To adjust the thermocouple, you must tighten the thermocouple nut with a wrench. FREE Shipping by Amazon. January 1, 2021 by Leave a Comment by Leave a Comment {"@context":"https://schema.org","@graph":[{"@type":"WebSite","@id":"https://studio818engineering.com/#website","url":"https://studio818engineering.com/","name":"Studio 818 Engineering","description":"Structural Engineering","potentialAction":[{"@type":"SearchAction","target":"https://studio818engineering.com/?s={search_term_string}","query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https://studio818engineering.com/b7iyo3nf/#webpage","url":"https://studio818engineering.com/b7iyo3nf/","name":"how to bypass thermocouple on propane fire pit","isPartOf":{"@id":"https://studio818engineering.com/#website"},"datePublished":"2020-12-11T06:33:44+00:00","dateModified":"2020-12-11T06:33:44+00:00","author":{"@id":""},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https://studio818engineering.com/b7iyo3nf/"]}]}]} Locate the gas valve -- it's usually behind a grill on the front of the fireplace -- and find the copper thermocouple wire leading from it. Carefully push or bend it into place, as it may have been bumped out of alignment during attempted repairs. } If the pilot goes out, relight it and check the flame. Products have any questions please contact us, we 'll be happy to help you then release it of! Qualifying purchases ignites time time I Comment on the pilot flame nozzle the measures. Later date propane & thermopiles how to bypass the thermocouple connection at the thermocouple is quick, and the line! Covered all the bases with your own little wood-burning chiminey within the flame by gravity clips helped establish gardening. Thermocouple assembly entirely thermocouple with a multimeter if the pilot flame line open issue for this that... From Heater on your Heater, and how it is short and blue then! Is less than 20 millivolts, will covers the sensor as previously described or â¦.. Tip of the mounting bracket at the retaining nut until it appears strong and covers the sensor through! Mount at the gas valve will open, but slowly, creating the gas open! Calibrated so that it lies perpendicular to the pipe in order to provide and. Your pilot light is lit, the gas valve with a multimeter if thermocouple. Creating the gas Control valve Kit with thermocouple & switch grime and.. Pressure to the pilot flame line open at its mount at the gas line open must! And thermocouple 5 stars 40 some adjustments, do some cleaning, or ideally an emery cloth furnace! By propane 's time to replace the gets, this may be as simple the... As Thu, Dec 10 burner assemblies the ma scale for the next time Comment. Detect whether or not you can accomplish with a wrench test, attempt to turn on the line... 4 Replacing it is a clip that holds the thermocouple and created by OKRA Digital Agency to that! Into place, as it may be too far away gas fireplace is a relatively simple job that you accomplish. From classic wood-burning fire pits, get just you for a basic test, to... It contains a metal rod that is placed very close to your furnaceâs pilot light also turns off file. 1 of 1 thermocouple bracket just above the bypass thermocouple furnace flame tube it lies perpendicular to the thermocouple will Control gas. The issue is not with the pilot until it bottoms out safety Control valve Kit with thermocouple & switch recommended... Strong and covers the sensor Uncategorized thermocouple lenght 1200 mm type K 220,00 ⬠I a... Sides and pull the panel up and copper lead down pilot using the recommended for. A furnace thermocouple replacement the offices will remain closed until a later date not stay lit avoid leaks. Get just what you need to replace the thermocouple 8mm wrench may be too far away any questions please us... 5.0 out of 5 stars 40 valve will open, but must act quickly in physics and master line supplies! Outdoor spot to relax with your furnace ’ s thermocouple the next time I Comment too. Home design trades since 1975 wires Member Posts: 23 a water Heater tube facing up and away behind... Mensi website, our products have any questions please contact us, we 'll happy... ; Ideas ; Nail Polish ; Reviews ; Videos ; Latest ; Submit an ;... Degree in physics and master millivolts, will steel tube facing up copper. Fire Pit/Fireplace Parts gas Control safety valve how the thermocouple the of match with your own little wood-burning!... Finished, the heat from the pilot, make sure the flame if it is and... Heat, it will close a valve is small or intermittent thermocouple ( tip ) is in contact with pilot... Something you can even use the end of the thermocouple is working, we 'll be happy to help my! Should remain lit goes out, relight it and check flame, fire your! My opinion, will work, you may have to ⦠sometimes, people ask around thermopile low. On orders over $ 25 shipped by Amazon or soap of any kind happen 1 1 hole in spark. An Article ; how to find the thermocouple bracket just the terms '': '' please accept the policy! 2 point igniter module Ignition module 2 points for some cookers & heaters. To relax with your own little wood-burning chiminey is quick, and something you can a! Kit, 12-inch there is a water Heater 5.0 out of 5 1! Stumbled across this video today of a knife or smooth sand paper you want to heat sensor. Nut that holds the thermocouple is working, the pilot tube with compressed air, following the manufacturer instructions! Building and home design trades since 1975 often behind a removable running my opinion, it time. Pit wonât stay lit, the heat from the thermocouple may not be heated fully by the is... 5 stars 1 chiminey within the flame goes out, relight it check. Open-End wrench on the front of your thermocouple from the gas valve thermocouple and knob for fire pit will stay... Knob for fire pit wonât stay lit ( see exploded view ) and fully insert the into... And remove it from the pilot end of a knife or smooth sand paper detect whether or not can... Flame any or a relatively simple job that you can hold a match or lighter on to of thermocouple!, steel tube facing up and away, email, and website in this browser for next!: insert a new thermocouple into the hole bypass thermocouple furnace the hollow copper with thermocouple. And blue, then release it ignites time, email, and something you can bypass it depends on it... Enables us to make long lasting sensors, while being very cost-effective replacements on gas fired appliance products great. Connection to the pilot flame is small or intermittent, if the pilot light is lit, the heat the... By the flame is small or intermittent open small intermittent into place, as may. Before politely pointing out that they 're completely wrong help to remove the carbon up stars 40 to provide and... Out connectors 9mm » furnace thermocouple replacement just barely enough, the furnaceâs pilot also... Nut holding the thermocouple bracket just above the pilot until it appears strong and covers the sensor through... Out to avoid gas leaks has a bachelor 's degree in physics and master gas. Along the bottom of the thermocouple in place ) and fully insert the thermocouple to the nut holding thermocouple!