Friar heats up to correct temp but doesn't maintain
After friar reaches desired temp app.350 degrees and turns off the burners will not relite, in another words it doesn't cyle on and off or maintain the temp. Turn it off and let it cool off and it will heat up and repeat as above.
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How many degrees before it reaches desired temp, does it shut off? A thermostat is designed to shut the furnace off a couple/ few degrees before it reaches set temp. It has what is called a heat anticipater, which shuts the burner down, and lets the blower use the remaining heat from the heat exchanger to bring it up to desired temp making it more efficient. If it is more than a few degrees, replace the thermostat. You can jump out the red and white wires to confirm the faulty thermostat. If by doing this, the furnace never shuts down, until you separate the red and white wires. That confirms a faulty thermostat. Hope this helps someone.
Hi limit device trips prematurely (should only trip when oil temp reaches 450F). Check if the hi limit sensing bulb (located inside the fryer tank, between fire tubes) is not touching the fire tube because if it does, it will sense the heat from burner flame which is much higher than oil temp.
yes this is totsly normal
they are really not burners, they are elements, and you dont really cook from the heat of the burner, on this design, you actually cook from the heat of the glass, so as the glass cools through convection, the element will cycle, on and off to ensure the glass maintains a temp +- 25 degrees to the set temp
When the thermostat calls for heat it should run until the room reaches the temperature setting then shut off. Is the blower motor running and can you feel air coming out of the vents? It sounds like the blower is either not running or putting out enough air to keep the furnace heating. The blower moves the heat from the heat exchanger to the room, if it can't remove enough heat from the heat exchanger there is a limit switch that will shut the burner off if it gets to hot and that's what it sounds like is happening.
Use an oven thermometer Try to figure out if by setting it to 390 it will maintain 350 accurately. (A 25 degree change while it cycles is normal. It will probably overshoot before going off and undershoot a little before cycling on.) If so the thermostat has just drifted. Pull off the control know and look usually there is an adjustment on the shaft to change the temp showing on the knob. set it up 50 degrees. If the knob can't be changed just know that you have to adjust yourself. If it won't maintain a steady temp the thermostat is bad and will need to be replaced. The thermostat will be over $100 it may not be worth it. If this is a computer controled unit (pushbutton temp selection) the sensor needs to be replaced. This is a lot cheaper than a thermostat.