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  • Advanco fryer shutting down

     Hailstone updated 1 week, 4 days ago 2 Members · 6 Posts
  • Hailstone

    November 16, 2021 at 4:05 pm


    I'm working on a Advanco fryer model # FF300-P BTU 90.000 Serial 16070423V. It's a two-unit side by side, it started out not keeping the temp up for a couple days, during frying but burners were on, pilot stayed on the left-hand unit. Then after two days of not keeping the temp up it started shutting down including the pilot light, left hand unit only. Been reading, however it seems a lot of advice on the net is to start replacing parts one by one.

    On the right-hand unit, it has been keeping temp and goes into a secondary propane blast to keep the temp while frying, the Left-hand unit did not. prior to it losing temp it seemed to work fine…

    I downloaded the manual from but the trouble shooting was not to informative.

    Thank for your consideration

  • Hailstone

    November 16, 2021 at 6:34 pm

    To clarify This Advanco model # FF300-P is a two basket unit, four burners per unit. When I mentioned its a side by side I should have mentioned that there are two separate fryer units, Two, two basket units connected together by a stainless-steel connector flange. Its really two separate fryer units… the right side two basket, four burner unit works fine.

    I hope that make since…

  • fixbear

    November 16, 2021 at 7:33 pm

    Advanco equipment are a after market machines that are private label from Webresturant stores. Originally a PA company. In-expensive , but usable and normally reliable. They are built with old but proven design. So I'm guessing that you have a millivolt pilot design fryer. What you want to look at is if the burners are all lighting normally and that the thermostat is reliably functional. I do not like just parts changing on any piece of equipment. As a tech our job is to accurately determine the real problem.

    So make sure to measure the power voltage to the gas valve. Check the burners ignition ports/transfer ports to be clean, That the electrical connections and repeatability of the thermostat is on.

  • Hailstone

    November 17, 2021 at 3:42 pm

    Thank you fixbear, I went and fiddled with it last night, I think the inner thermostat was shoved up against the burners. I did watch some YouTube did some testing on the Dial thermostat tested good with the resistance tester. one of the cooks were pretty tough on it. I read that Heavey pounding could pop a valve in the thermopile and prevent the burners from keeping the heat up or shut them down prior to reaching temp.

    As for the thermostat shutting down, I think others were fiddling with it in-between me working on it.

    One more thing when they were cleaning the oil, transferring the oil, they wedged the refill tube between the thermostat and heat tubes, bent the thermo stat against the heat tubes. I think that could have been the culprit pushing the thermostat against the heat tubes shutting it down keeping the temp down.

    I'm going to monitor it today, hopefully it will keep its heat. I did run some frozen boneless chicken in it last night, the burners did kick on, maintained heat, so it may just have been the inner thermostat. I also used a candy thermometer and it stayed pretty steady at 350.

    Thank you for your advice, I'm going to monitor it today and go from there.

  • fixbear

    November 18, 2021 at 12:24 pm

    That machine has a bourdon tube mechanical thermostat as the main control and a high limit resettable as a safety. If the small diameter tube get bent sharply (ie crimped, crushed or kinked) it will require a replacement. They are sealed with a expandable liquid like a thermometer has to create a repeatable pressure on a diaphragm that operates the contacts inside the thermostat. The tube has a very small hole in it and any restriction will delay the thermostat's reaction to temperature change. The accrual sensing is the bulb inside the oil tank. They do get damaged at times from improper cleaning. Especially the bulb mounting.

    One of the other things to always check on fryers is the vent tube for the gas regulator. They often get plugged up with oil that has dried inside the vent port. The draining and filtering process is always a bit messy to say the least.

    Glad to hear that you found a problem and corrected it.

  • Hailstone

    November 18, 2021 at 4:26 pm

    Thanks again, Fixbear, Grateful for your time and consideration as surely, I'll be working on these in the future. The cook said it was working good last night, He thought one time it was a little cool but wasn't so sure. I appreciate your expertise and explanation and letting me know the correct terms and how it works or is supposed too anyway. I did let him know not to be so rough on it as the manual stated in troubleshooting pounding on it could cause it to shut a valve down in the thermopile thus cutting the propane down… Don't know why they pound so hard on the dang thing, also showed him where the inside thermostat and bourdon tube are so hopefully, they will not jam the return cleaning tube in so hard and leave it hanging there to bend the thermo lines against the baffles. I'm grateful for this site as I don't like to just buy the parts and replace, plus we live pretty remote so it takes extra time in shipping. And it's not my money, I just help, do the Maintenace in exchange for eating and such… Will Work for Food! LOL I'm happy, their happy.

    They have an old Manitock ice machine that just drives me nuts but thats another story.

    Ill check the vent tube for the gas regulator for harden oil build up as you suggested too. TY!

    I do believe that was the problem, the bourbon tubes up against the Baffles, if not let it develop and fix it tomorrow. Thank you again for that explanation.

    I saved this page so I can get better familiar with the terms and Issues…

    Thanks again Fix It Bear! Very much appreciate it.

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