Wells f 49 fryer

Check the resistance or thermostat.

There are several possible causes of this problem, aside from a loose or damaged wire, which is uncommon. The cause in about 95% of the cases is a thermopile that has gone bad. The thermopile is the small cylinder that is attached to the pilot assembly where part of the pilot flame can contact it. It has a cable or wire going to the gas valve, high limit switch, or both. When hot enough, it produces and electrical current that keep the pilot on and allows the main gas valve to open. This is not hard to replace in most gas fryers and not too expensive. This often starts as an intermittent problem. The second possible cause is a defective high limit. The high limit is a small rectangular device with wires going to the gas valve and a tiny stainless tube that goes through the bottom of the kettle to a sensor bulb, like the thermostat has. These are usually self resetting, but may have a small red reset button. If present check the reset. If no reset, jump the two wires and see if the fryer will now light. If so, the high limit is defective, assuming the fryer is not over temperature. If defective, replace. Do not operate the fryer in this condition as there is no over temperature protection. The next cause is if the oil is too hot, in which case the high limit will shut off both the main burner and the pilot. The pilot cannot be relit until the fryer cools down and the high limit resets. If the oil is too hot, usually over 425F, replace the thermostat. If the high limit trips when the oil is in the normal operating range, replace the high limit. The final cause is a bad gas valve. This is not too common, but the gas valve is expensive and a bit difficult to replace. Check all of the other causes first.

partstown.com or webstaurantstore.com

You can download Owner's Manual which contains Wiring Diagram at http://www.wellsbloomfield.com

Regards.

Hi there.
Thermopile must be free of soot or any form of dirt so that it coud absorb the right intensity of heat from the pilot flame for millivolt generation used in energizing the pilot and main valve electrical coils for pilot and burner operation. Pilot flame must be stable during fryer operation as well as the gas pressure being supplied to the unit.
All wiring connection must be tight, a very small amount of voltage generated by the thermopile or millivolts will not pass thru loosely connected wires.
Regards.

Replace the thermostat. If it's really getting to 550F without shutting off the pilot and main burner, or the electric in an electric fryer, by tripping the high limit, replace the high limit as well. The high limit should shut off all the gas or electric at about 425F.

Might be the high limit thermostat or the control thermostat. Check your gas valve for continuity.
If you have a fuse in line with the control check it for continuity. Most of the time if the pilot is lit you have a bad valve, I would check that first. The valve is a combination gas valve. That means it has the pressure regulator built in. Check out the connection between the gas valve and thermostat. If no continuity between the 2 outer terminals change the gas valve. If the thermostat is open change it out. The high limit will connect between the left terminal shown and the safety magnet. I know this page shows a floor furnace thermostat but a geep fryer works exactly the same with a different thermostat and high limit.


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Assuming that your make up air and exhaust hood are properly balanced, no negetive pressure conditions exist, your gas manifold pressure is at 4" wc, your air/gas mix on the burner set correctly, the your problem would be the pilot adjustment. If the flame is not intense enough flame to survive the sudden air shock, it will go out.

The pilot height should be about 1 1/2". Your Pilot orfice could also need cleaning. Eliminate excessive draft in your kitchen.

Here is the manual for your unit, it covers these topics.

http://www.frymaster.com/docs/uploaded/fry/products/OperationalManuals/819-5355.pdf

Hello

This sounds to me as if your thermostat is not cycling the unit off. But I can see a second problem as well there should be a high limit cutoff to prevent it from running on and boiling over. I would check both. The thermostat is the dial or knob to regulate temperature and the high limit is the safty to prevent boil over or run on.

Thanks

The high limit switch itself is getting weak , replace it and problem solved!