Question about Vulcan 36L Gas Kitchen Range

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I replaced the thermocouple on my Vulcan 36SL. First time, first problem in 10 years. But the pilot flame still goes out. Any advice?

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You should check to be sure your pilot flame is strong and not wavy. This can be caused by the pilot itself being dirty and clogged. The pilot gas orifice is very small and it doesn't take much to disrupt the flame. If this is good and the pilot flame is heating the thermocouple correctly you will need to look at your safety valve. It could be the problem. Be sure not to over tighten thermocouples into the safety valve, they should only be hand tight plus a quarter turn. Any more than that can break the safety and the thermocouple. You should also check the gas pressure, if it is too low or a regulator is not working the pilot can go out when the main burner is turned on (pilot can get starved in low pressure situation). Another item to check is drafts and air movement that could blow the pilot out, since the oven has been there a while this is not likely the cause. I hope this helps. Please take a moment to rate me.

Posted on May 14, 2009

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My water heater won't light. The pilot light works. But, when I try to swtch the pilot to regualr, the flame goes out.


You probably have a defective thermocouple. The thermocouple sits in the flame of the pilot, and the heat generates a small electrical current conducted back to the gas valve, keeping the pilot gas line open after you switch it to the "on" position. That's why you have to manually hold the gas valve depressed (on) during lighting in the "pilot" position, allowing the thermocouple time to heat up enough to generate its current. A defective thermocouple will not generate the holding current.

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The heater will light then you let the knob go and the gas goes out even after leaving alight for several minutes. I have lubricated the gas controlled and there is full movement it is approximately 12...


Lea, the problem is not the gas control valve. It's the Thermocouple that needs replacing. When the Thermocouple fails, the pilot flame will not stay lit. The Thermocouple is a safety feature that stops the gas, if the pilot flame goes out for any reason. If you've never replaced it before, I'm surprised the original one has last for 10 years.

Hope this helped you solve the problem.

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Can't light a vulcan heritage gas heater, the pilot light lights, but as soon as I try to lift my finger off the button to ignite the heater, the pilot flame always goes off.


Hi and welcome to FixYa, I am Kelly.

What you are experiencing is the lack of a signal from the thermocouple to the gas valve. I.e. the thermocouple is not passing heat information at all. This is caused by either a defective thermocouple, a dirty mating area where the thermocouple connects to the gas valve or... an improperly positioned thermocouple that is not "in the flame" with the pilot lit.

  • First make sure the FIRE end of the thermocouple is in the flame when lit. (reposition if necessay)
  • Next disconnect the thermocouple by unscrewing the fitting on the top of the gas valve. (No gas will come out) Clean the metal mating area as best you can and then re-install the thermocouple. Just a good snug fit. Once you feel it come snug add 15 degrees of tightening motion with a wrench.
Attempt to light the pilot... wait 45 seconds to 1 minute while holding the pilot button down before letting it up. If it stays lit.... GOOD JOB. If it goes out the next step is to replace the thermocouple. If after replacing the thermocouple it does not stay lit the remedy is to replace the gas valve. There are no short cuts and the sequence of repairs is just as I stated in order.

You can remove your old thermocouple and walk in to almost any appliance parts supply or Plumbing and heating supply to purchase the correct thermocouple without a part number. They will match it up with yours.

Thanks for choosing FixYa,
Kelly

Feb 20, 2011 | Heating & Cooling

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I have a Vulcan Freeloader that is over 10 years old. The pilot does not stay lit when I release the red button. Also, the pilot flame is orange. What can be done as the main burner would not work when the...


The pilot assembly is stopped up. It will need to be taken apart, blown out or cleaned and re-intalled. The yellow, lazy flame is preventing the thermocouple from getting warm enough to allow the main burner to ignite. Hope this helps.

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1 Answer

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Hello,
This is most likely a thermocouple problem. Try replacing the thermocouple. If it still does it then the draft from the fire is pulling so hard that it pulls the flame away from the thermocouple just after the flame goes out. readjust the way the pilot flame hits the thermocouple to keep it on the thermocouple...

Heatman101

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Vulcan 148L oven burner will not light. pilot on. should pilot flame touch thermocuple?


Yes.

Over time, thermocouples erode in pilot flames and when they no longer reach the pilot light they need to be replaced. Check the thermocouple mountings as well: some ham-fisted amateurs try to bend the probe back into the pilot light and break the mountings. The pilot light jet will also need to be checked to ensure that it is clean and that the pilot is burning correctly.

Note that as with all gas appliances, repairs should only be carried out by qualified gas fitters who have the tools and knowledge to leave your appliance in a safe condition. In many countries it's a legal requirement. My reply is therefore given on an informational basis only as poor workmanship on gas appliances is directly attributable to many deaths every year.

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One of the top burner pilot lights will not stay


You probably have grease that has gotten into the pilot. Turn off the gas to the pilot and detach the pilot tubing and pilot tip. It sometimes helps to take a propane torch and heat up the pilot tip and tubing, paying special attention to the first bend from the pilot tip. Get it red hot and tap out any ash from the inside. You may have to **** out the tubing with a piece of bare wire or blow it out with WD-40. With the oven pilot, check the pilot flame. If low, adjust. If OK, replace the thermocouple. If neither of these corrects the problem, replace the pilot satety. I always recommend a new thermocouple with a new pilot safety.

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1 Answer

Can't get pilot light to light. Comes on


you can only test this with a volt meter capable of testing milivolts. or replace the thermocouple. the thermocouple is what the pilot flame is burning onto. the pilot flame could also be weak due to a dirty pilot orifice in which case the flame will appear lazy and yellow /orange. the thermocouple should test 30mv + - 10% you should contact a service company if replacing the thermocouple doesnt fix because gas isnt somthing a un-qualified DIYer should risk there home with.

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1 Answer

I have a propane reddi heater and I can't get it to stay on after I light it, it won't stay on. Is there something that needs to be cleaned or replaced


Generally speaking a propane heater stays lite because the pilot stays lite. The pilot flame touches a thermocouple which produces a current which keeps the main valve open. Pilot goes out or you have a bad thermocouple or the pilot is slightly clogged (reduced heat to thermocouple) or maybe the thermocouple is not touching the flame enough. Most times when a propane heater goes out the problem is somewhere in that neighborhood. Thermocouple - pilot. I have always had luck carefully taking those parts off, cleaning, and reassembling, but check the position of the thermocouple first. Looks like a small brass rod which sticks into the flame. This is a safety mechanism to prevent the flame being blown out and leaving the gas on. Good luck

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