Question about Williams 6508732 Gas Heater

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I have to change the thermocouple but cant figure out how to get at it

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Usually there is a small screw near (below) the pilot flame, loosen that and the thermocouple should slide out of the clip. You might need a flashlight to see it.

Posted on Nov 11, 2010

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1 Answer

What is a thermocouple


A Thermocouple is a sensor used to measure temperature. Thermocouples consist of two wire legs made from different metals. The wires legs are welded together at one end, creating a junction. This junction is where the temperature is measured. When the junction experiences a change in temperature, a voltage is created.

Thermocouple-Thermocouples-What is a thermocouple-Types of ...

www.thermocoupleinfo.com/

Dec 13, 2016 | Heating & Cooling

Tip

Repair your infra red heater thermocouple,do not buy one


The most common problem,for a infra red heater is the thermocouple.Not always,but if you look at the thermocouple,and it is no longer in the flame of the pilot lite,then it is the problem.The thermocouple has to be in the flame of the thermocouple,so ,to do that,you have to fabricate an extension,so that it will be in the flame of the thermocouple.I have found that a piece of tubing,such as steel brake line,works the best,use a tubing cutter,and cut a piece off the end of the steel brake line tubing.Figure out ,about how long it would have to be,to reach the flame of the pilot lite,and cut it,then just slide it over the top of the thermocouple,on the tip.The size tubing that you will need is 1/4 in .Any,and I mean any,auto parts store will have this,for about$ 2.50 or $3.00,get the shortest piece they have,most likely a foot.This tubing will heat up,therefore,transferring the heat ,to the thermocouple tip.There,you have done it,all by your self,and saved about$ 65.00.Labor,and parts.And the time involved waiting for someone to fix it.It is perfectly safe.So get to it america,fix it your self.

on Jan 13, 2010 | Heating & Cooling

1 Answer

I AM WORKING ON A COZY W501E WALL FURNACE AND CANT GET THE PILOT TO STAY LIT. i HAVE CHANGED THE GAS VALVE, THERMOCOUPLE,AND THE SENSOR FOR THE HIGH LIMIT. THE PILOT WONT STAY LIT.


Pretty much the only thing that will do that is the thermocouple not generating enough voltage for the valve to say it's OK.
Usually you need to hold the button for pilot lighting for 60 seconds. You can use a meter to check that it's generating enough power. The thermocouple has to be in the pilot flame properly.

Check this video:
https://www.youtube.com/watch?v=suen7QlJl4o

Gas furnace will not light Thermocouple test with the multimeter

Or see this site:
How to Test Thermocouple with Multi Meter Heating and Cooling

Feb 11, 2015 | Cozy Heating & Cooling

1 Answer

How to change thermocouple on model 640YORT


I believe that is a Reliance 606, ehow has instructions on how to change the thermocouple.
http://www.ehow.com/how_6579030_change-reliance-606-thermocouple.html

Aug 24, 2014 | Water Heaters

1 Answer

We replace the thermocouple and cant get the pilot t stay lte.its on a 40 gal hot water heater


Sometimes, when DIYers install a new thermocouple they over tighten it. The correct way to install a thermocouple is to finger tighten the connection into the gas control valve and then, with appropriately sized open in wrench, tighten it only 1/4 turn more. Over tightening it, can cause the control valve to lockup. Also, check the positioning of the thermocouple. The pilot flame should engulf the tip of the thermocouple. If it doesn't reposition the thermocouple and clean the pilot. Especially clean it, if the pilot flame is curling upward, instead of being straight out.

Hope this helped you troubleshoot and solve the problem.

Apr 20, 2011 | Heating & Cooling

1 Answer

I changed the thermocoupler but problem remains the same: pilot goes out after about 10-15 minutes. I have Williams model 250912. Please help! How do I test if new thermocoupler is also bad, beside...


Remove the thermocouple and take a pencil eraser to the hole. Clean the corrosion out the hole. Reconnect the thermocouple tight. The tip of the flame must hit the tip of the new thermocouple.
If the flame is hitting the middle of the thermocouple that is called wash through (no good) The bimetal tip of the thermocouple is made of nickel and copper layered. When heated it produces millivolts. This holds the electromagnet in and that is your safety feature. Thank you Ralph Nader.
themobilian_1185.jpg

Jan 30, 2011 | Williams 2509612 Ceramic Mid-Size Heater

1 Answer

Pilot won't stay lit


If a standing pilot won't stay lit, the usual cause is a bad thermocouple. The thermocouple is a safety device with a probe that is kept heated by the pilot flame and produces an electric signal. Wires from the thermocouple connect to the main gas valve. If the thermocouple fails, the main valve shuts off gas to both the pilot and main burner. When you try to re-light the pilot, it goes out again as soon as you release the pilot button on the valve.

A new thermocouple is only $10 or so, and it's pretty easy to change. There are a number of how-to sites and videos showing how to change the thermocouple in gas furnaces and water heaters, and the process is similar in commercial ovens and fryers. Once you see what the thermocouple looks like and how it's installed in some other appliances, you'll be able to identify it in your fryer and see how to change it. That should get your frying again.

Dec 28, 2010 | Imperial IFS40 Deep Fryer

1 Answer

The pilot light doesnt stay on to light the fryer... is there anything i can do? it is a lincat twin gas fryer....


Hi and welcome to FixYa. Most of the time this is as simple as changing the thermocouple. Any Appliance parts source will most likely have one that will fit your unit. (GAS VALVE OFF) It is a matter or unscrewing the thermocouple nut from the gas valve and then un-mounting the thermocouple probe end to change it out.

Take your OLD thermocouple with you to your LOCAL Appliance parts source so they can match the total length. Heating and Air-conditioning stores may have the thermocouple but your going to pay up to purchase a thermocouple from them. Same goes for restaurant equipment sources! $$$

Just make sure before you reinstall the new probe assy that your clean / wipe out the gas valve hole where the thermocouple nut mates to the gas valve very well. The probe works via micro volts and any dirt / corrosion / debris can affect the way the probe operates.

After changing out the thermocouple everything should work normally again. If not then the gas valve itself has a problem (highly unlikely) In the future if you need detailed info please pass your units model number in your response.

Thanks for choosing FixYa.
Kelly

Sep 12, 2010 | Kitchen Appliances - Others

2 Answers

Pilot light won't stay alight, when i release the knob after lighting, the flame goes out.


hello!! if you changed the thermocouple & the pilot still goes out !! could be a thermostat ( the electromagnet pilot safety ) goes bad !! make sure pilot is clean & should be sharp BLUE pilot !! not yellow & soft !! also hold down the button light the pilot use a digital volt meter set on dc milivolts a brand new thermocouple should test @ 30 milivolts+ - ! & if you have new style water htr with sealed combustion the thermocouple has a safety part of it ! change the thermocouple & make sure your vents for combustion air around the bottom of the water htr has lint & dust built up !!! kiddbrother i work for a gas company doing service !!

Dec 14, 2008 | Rheem 36" Water Heater Thermocouple Kit

1 Answer

Thermocouple goes out


check size of pilot might need cleaning also check thermocouple where is screws in to valve might be a loose conection or change thermocouple

Jan 19, 2008 | Dyna-Glo D-E37 Wall Mounted Panel Heater

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