Question about Vulcan Kitchen Ranges

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My Vulcan G40-TB braising pan pilot is not igniting to heat the thermocouple to eventually ignite the main burners. What is the problem?

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  • Vidish Narinesingh Sep 06, 2010

    The pilot does not light when the the red button is depressed, and hold for 5 seconds at the inlet pilot assembly. This assembly on inlet gas line is connected together with the thermocouple and routed to the pilot system. What actually ignites a flame to light the pilot? This item was recently converted from NG To LP purchased at Bakedeco.com. Is their a better soloution that,s cheaper to light this equipment to perform the same function?

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Hi, if the pilot light is staying lite, then the thermocouple is doing it's job. If you have moved the knob from the pilot position to the on point and the burner does not ignite, you probably have a bad gas valve which needs replacement.

Posted on Sep 06, 2010

  • Tunde Autos
    Tunde Autos Sep 06, 2010

    I will advise you to repair the thermocouple instead of finding a shortcut to the problem..

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My uniflame has two burners and one does not ignite. Everything seems to be tight. What can I do to get this to ignite when turning ignition knob? Thanks!


When you say two burners, I believe you are referring to the pilot flame and the main burner. The pilot flame has to light and heat the thermocouple befoe the main burner will ignite. The pilot flame will not light if: there is not enough gas in the tank, the pilot jet is clogged, or the regulator is bad. Check the tank to make sure it has gas. The next thing to check is the pilot jet. You have to take the heater apart, somewhat, to get to the pilot jet. The tube and the orifice need to be cleaned out, compressed air in a can and a pipe cleaner make the job a little easier. If this does not work, replace the reglator and hose.

Jul 22, 2011 | Uniflame GWT501A Open Flame Patio Heater

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Pilot will light after 30 seconds when you try to move knob to on position the pilot goes out and heater won't ignite.


You need to replace the thermocouple.
When you light the pilot it is supose to heat the thermocouple.
the thermocouple produces a small electric current which allows the gas valve to open and keep the pilot going. and allowing the main burner to come on.

Jun 21, 2011 | RTO Atwood Water Heater - 6 Gal LP

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We purchased a used Vulcan Steamer model # VSX10GC which was set up for propane. We need to convert it to Natural Gas. How do we do this and how do we get the parts



Please be careful when converting appliances form natural gas to propane. Depending on the equipment there are several changes that need to be made. You will at least have to change burner orifices and convert or replace the gas valve. Some gas valves are not convertible. What many people over look are changing the pilot orifice and on some appliances like braising pans, griddles and char broilers there is a runner tube orifice. The gas valve also needs to be adjusted to the proper manifold pressure and pilot adjustments will be required. I recommend on Vulcan equipment that you contact Hobart Service since they are factory trained on all Vulcan cooking equipment.

Mike

Mar 11, 2011 | Vulcan Hart VSX5G Counter Convection...

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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.

Jan 20, 2011 | Heating & Cooling

1 Answer

I have a Maytag gas over/stove, Model number MGR5755QDW. The broiler heats, but the oven does not. What are the possible causes and how do I troubleshoot?


If you are having problems with the oven, the first thing to do is figure out if you have a pilot light system or a glow bar system.
Problems with the pilot light system.....The flame has gone out, re-light the pilot. The pilot flame will not light - possible oven control is not sending gas for the pilot light. The pilot light works but no main burner ignition - possible pilot assembly is dirty and the pilot flame is too small, safety valve and thermocouple is faulty, the bulb from the safety valve is out of position and the pilot flame is not touching the thermocouple bulb. Some ranges use a standing pilot light ( small flame is on all the time ) while others use an spark ignition to light the pilot light flame and the pilot light flame heats up the thermocouple bulb to allow the main gas to flow through the oven burner.
The flame needs to heat the bulb up enough to tell it to open the gas valve. Several things can go wrong here that keep this from happening:
The pilot flame may not be hot enough, usually because the flame is yellow instead of pure blue or is too small. The cause for this is usually a dirty pilot assembly. The pilot assembly would either need to be cleaned or replaced.The thermocouple bulb may not be positioned properly in the flame. You can't heat the bulb properly if it's not in the pilot flame! The thermocouple bulb needs to be in the upper third of a pure blue pilot flame--that's the hottest part of the flame.
The thermocouple itself may be burned out. It happens. It's a internal part of the gas valve so, no, you can't just change the thermocouple bulb separate from the gas valve.
But when you turn on the oven or the thermostat calls for heat, the pilot flame gets bigger and jumps down so it can heat up the thermocouple bulb. This extra gas to increase the pilot flame size comes from the thermostat.
If the pilot flame jumps upwards or just gets bigger, but doesn't shoot down, then you need to replace the pilot assembly.If the pilot flame size does not increase or jump down when turning on the oven thermostat, then the problem is the thermostat not sending enough gas to the pilot assembly. It's also possible that the pilot gas supply tube has a hole in it somewhere.
One final point on the spark-assisted pilot ignition systems. The spark comes from the spark module--the same module that sends spark to your surface burners to light them up. If you're not getting a spark when you turn the oven on, then there are several possibilities:
There could be a problem with the switch in the thermostat. You can confirm this by doing a simple continuity test of the thermostat contacts. If you don't read zero ohms when you turn the switch on, replace the thermostat.The spark module could be bad. You'll need to measure the voltage at the oven terminals of the spark module when you turn on the oven. If you get 120v but no spark, it's probably a bad spark module. Replace it.
Could be a bad spark wire or broken electrode.
Problems with the glow bar system.....You may even see the orange "glow plug" (called a hot surface igniter) glowing orange and so assume that it's OK. Not necessarily!! You have to measure the current/amp drawn by the igniter and compare it to this repair sheet before you can say it's OK or not. The gas valve has a bi-metal that open when a certain amount of current flows through it to heat it up. The igniter is wired in series with the gas valve. As the igniter gets older or weaker, it's resistance increases to the point where not enough current is flowing to the gas valve bimetal to open it up. As a result, the gas valve never opens up. BTW, a common symptom of the early stages of this problem is erratic temperature control in the oven due to delayed firing of the bake burner while cooking.
The hot surface igniter will not come on - check igniter with a ohm meter, you should have continuity through the glow bar, the glow bar can also crack = new igniter time. The glow bar comes on but the main burner will not light - you should have an amp probe to check properly, but often this is a hot surface igniter problem. The hot surface igniter often looses it's ability to get hot enough to open the gas safety valve. The safety valve can fail, but most times it is just a bad hot surface igniter. The hot surface igniter can also quit part way through cooking , in other words the oven may cycle a couple of times and then it just sits there with the red glow from the igniter. See this service sheet for the proper way and amp readings for the hot surface igniter system. Hot surface igniters do weaken and will eventually generate less heat than they normally could. When this happens they can still allow marginally correct current to flow to the oven gas valve for it to open but not get quite hot enough to ignite the gas burner immediately. When this happens, gas released into the oven can sometimes build up to the point where when finally ignited, the amount of gas lit can cause a small explosion inside the oven or cause an odor of gas with out the oven working. Yes, your glow bar igniter can glow orange-red and still be bad!! How a common gas valve works -click here.
You can get required parts from www.repairclinic.com
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.

Jan 26, 2010 | Kitchen Ranges

1 Answer

I have a Frigidaire gas range, model #FGF316BSA. When I attempt to operate the oven it won't light. The glow bar comes on but nothing happens after that.


Hi


Thanks for using FixYa. From what you have described it seems that possible oven control is not sending gas for the pilot light. The pilot light works but no main burner ignition - possible pilot assembly is dirty and the pilot flame is too small, safety valve and thermocouple is faulty, the bulb from the safety valve is out of position and the pilot flame is not touching the thermocouple bulb. Some ranges use a standing pilot light ( small flame is on all the time ) while others use an spark ignition to light the pilot light flame and the pilot light flame heats up the thermocouple bulb to allow the main gas to flow through the oven burner.


Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Jan 15, 2010 | Kitchen Ranges

1 Answer

After heating pilot goes out . my igniter is bad so i light manually and after heating main burner shuts off and so does pilot


The thermocouple that controls the gas to the pilot light must be bad. The thermocouple, when it is heated by the pilot light keeps a valve open that keeps gas flowing to the the pilot light. This thermocouple closes the valve that supplies gas to the pilot light, this is to prevent gas from continuing to escape when the pilot light goes out. This is a safety issue, I recommend that you call a professional about this problem. You might be able to repair it your self by replacing the thermocouple but I still recommend that you have it checked by a professional.

Dec 02, 2009 | Whirlpool Water Heaters

1 Answer

I have a vulcan freeloader 230 gas hot water system. the pilot will not stay lit. and some times when i do get the pilot lit, it will not ignite the main burner until i have lit the pilot a few times.


Clean the pilot assembly if has any orange at the tip. If its burning clean and blue, then its most likely the thermocouple. Safer to get a gasfitter to check it out.

Jul 18, 2009 | Heating & Cooling

1 Answer

Propane patio heater ignition problem


I would change the thermocouple and here is why:

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners

May 27, 2009 | Endless Summer Blue Rhino 235000...

1 Answer

Pilot flame starved out after burners ignite


The declining pilot light might be an indication it is being starved of oxygen by the main burners or some other sort of circumstance.

I have noticed how in a closed room without ventilation the pilot light soon begins to decline and then springs back again when a window or door is opened while the main burners are hardly affected.

This is the gas equivalent of sending canaries down coal mines and is an essential safety feature. If the pilot light declines very much the thermocouple bulb will not be heated and the gas supply to the main burners will be cut off. This is why the pilot light is set at an angle and the thermocouple bulb is slightly offset.

I am not sure if this helps but I hope it does.

Mar 08, 2017 | Ovens

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