Question about Vulcan EF3 Deep Fryer

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Main burner will not light or goes out before grease reaches temperature.

The main burner on the fryer sometimes will not light, and sometimes when it does, it goes out before the grease gets up to the proper temperature. There is no problem with the pilot light. When the t-stat is turned up it makes a clicking sound as if it is working properly, but usually the main burner does not come on. Please advise.

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Re: Main burner will not light or goes out before grease...

Before replacing any parts,clean out the pilot,burner orfices and burners.if this doesnt solve your problem replace the 18884hobart and get the parts dept.tell them you need a thermopile for the model of your fryer.95% of the time the t-pile goes bad.theres also the hilimit in the unit that kills the gas if the fryer gets too hot but i dont think thats the problem.also check all wiring connections to the gas valve (clean and free of grease).drain the oil in the tank and youll see 2 bulbs ones the thermostat bulb the others the hilimit bulb.make sure their secured to the bracket.

Posted on Jan 06, 2008

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Check if your pilot flame sufficiently heats thermopile during operation and make sure also that it is free of soot or any form of dirt, thermopile generates small amount of electricity to energize pilot and main valve of the gas valve for pilot and main burner operation. This electricity passes through hi limit mechanical contacts. Hi limit on fryers act as safety device which will shut down pilot and burner flame when oil temperature reaches 450F.
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Hi there, it sounds like your thermopile, for the pilot, is failing during use, when this happens, the small DC voltage it generates is less than the gas valve requires to stay open, and shuts off the pilot, which shuts off the main burners. Another thing that could be happening, is the hi limit is opening prematurely, instead of shutting of the pilot at 450 deg. it now is opening at 325, or 225 or 250. Sometimes the sensing bulb gets broken where it pass's through the oil tank causing this symptom. If you temporarily bypassed the hi limit to test this also, and it still goes off, you need a thermopile. If it stays on, check your temp with a reliable thermometer, and see if it reads fairly close to your setting, if so, then you need a hi limit.
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Pilot light

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.

Jan 24, 2009 | Frymaster Dean H17-SC Deep Fryer

1 Answer


It could be a faulty high limit, you can also check the high limit probe to insure it is mounted securely against the through tube wall in the grease. Also check the burner, there are baffles that run through it and when they get old the flames don't move though the burner correctly and will cause the high limit to trip prematurely

Nov 09, 2008 | Frymaster Dean 2424G Deep Fryer

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