Hobart Model#GF035A Replaced Pilot valve,but now it won't adjust temp or cut off when it gets up to temp.

change the cutting nozzle

Hello & Welcome to FixYa
If the pilot is clean and still won't light then the problem is with the safety valve that won't open and so needs replacement. Please get back to me if you have any other questions.
Kevin

It's all about duration. How much metal do you need to cut continuously. Although the 400 will cut a similar spec it won't hold out as long. So if it;s lots of short cuts the 400 is fine, if you need to cut thicker gauge for longer period go 500.

Hello Gelliott162,

Hello I understand that you have a question about a cord for your church's Hobart GF035A. This unit does not have a power cord it is self-powred unit. The theromocouple supplys all the power that is need for the Gas valve to operate. If the unit is not functioning properly you may need to replace the thermocouple on the unit.

The thermocouple is the cooper looking wire that sets next to the pilot light. The pilot flame engulfs the tip of the thermo-couple. The heat that is emited from the pilot on to the thermo-couple is changed in to power and controls the gas valve.

The capcity of the unit that you have is 35 pound of fat (shortening or oil). Make sure that the unit is full of fat before you try to fire the unit, as firing the unit without fat will cause the units vat to warp and can cause the unit to leak.

If you need directions on how to fire a the unit or light the pilot please post back to this thread and I will be happy to assist you with that.

Thank you for chossing FixYa.com

Justin

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

Check the pilot light size. Is it small and not surrounding the top 1/3 of the thermocouple? If it isn't then the pilot orfice is restricted or the pilot tube compression nut could be loose. The pilot gas adjustment screw may also need adjusting if this gas valve has one. These problems should only be addressed by an experienced service tech.

What type of gas supply line do you have? Is it black pipe or copper? If it is copper, there can be a film like substance that builds up on the inside of the copper. The debris will the get caught in a pre screen where the supply enters the valve thus cutting the supply of gas to the unit. Also, the thermocouple may be bad. You didn't say that you replaced it. Try replacing it as well. Also, you could have a limit switch turning the system off and thus cutting the gas off completely but it is highly unusual for the pilot to be cut off as well unless the pilot is being blown out when the gas is shut off. Also, turn the unit to fan only without calling for heat. Using a flame of some sort, put it into each baffle of the heat exchanger. If your flame is being blown around in one of the baffles, then you have a hole in the heat exchanger and what is happening is that the roll out switch is cutting the unit off and the air still moving through the heat exchanger is blowing the pilot out. I have seen this actually happen. If your furnace is in excess of 15 years old, it does need to be checked for possible holes. If it is in excess of 25 years old, it is a huge possibility that the unit has already developed a hole. If you feel hair coming out of one of the baffles, then shut the unit down immediately and have it replaced!

You will need someone who is qualified in commercial gas appliance repair to fix this.
Liabilities would render this out of reach for anyone else.

I'm a hobart tech,The valve your talking about is the saftey valve.Normally if i serviced your dishwasher i would replace both valves just because how old it is.But in most cases the saftey valve goes bad.The coil on the valve is weak and tends to drop out the voltage.Another thing to check that would cause the same issue is the pilot,especially propane gas.Sometimes you can just clean out the pilot but if it's warped i would replace it.

check to see if your element is scaled up or your element may be damaged