Fryer comes on gets to temperature, then after a varied amount of time depending on use will power down, and will not come back on to maintain temperature, or will occasionally come on, but not to desired tempature. I have replaced thermostat and high limit switch, was suggested to replace thermopile, but if that was bad it wouldn't hold a pilot light. When in heavy use fryer stays going, however when left idle will not maintain heat. Any suggestions?

How to Use Your Fryer:

• Remove all packaging materials, sticker, and labels.
• Clean the basket and pan with hot water, soap and a non-abrasive sponge. These parts are dishwasher safe.
• Wipe the inside and outside of the appliance with a clean cloth.
• Place the air fryer on a flat and even surface.
• Put the basket in the pan.
• Plug unit in to an approved wall socket.
• Place the ingredients in the basket and then put the basket and pan back into the appliance. The fryer LED will light up.
• Set your cooking time and temperature by either choosing one of the 8 presets or manually set it with the "+" or "-" buttons. See "Cooking Guide" to determine the right time and temperature.
• Once you have set your cooking time and temperature, press the "Start" Button.
• The heating icon and fan icon will be blinking and this means that the fryer is starting and is circulating the hot air in the fryer. NOTE: During hot air frying, you will notice that the heating up icon will blink and stays from time to time. When the heating icon is on, it means that the temperature inside the fryer has reached the set temperature. When the heating icon is blinking, it means that the temperature inside the fryer dropped and is below the set temperature and is currently heating up to the reach the set temperature.
• Some ingredients may need to be shaken halfway through the cooking cycle (see "Cooking Guide"), To do this, pull the pan out of the air fryer by the handle, the air fryer will automatically shut down. Then shake the contents in the basket, then slide the pan back into the air fryer and it will resume the cooking cycle. CAUTION: Do not press the button on the handle during shaking; this will detach the basket from the pan.
• When the cooking time has been reacher, the air blower will stop in 20 seconds.
• Pull the pan out of the fryer and place it on a pot holder. The cooking pan is VERY HOT do not put on surface that can burn. NOTE: Oil from the ingredients will gather in the bottom of the pan, so be careful when pulling the pan out of the fryer.
• To remove the ingredients, press the button on the handle of the pan to detach the basket. DO NOT TURN THE PAN OVER. PLACE ON A POT HOLDER.
• Upon placing the cooking basket back into the air fryer, the air fryer will automatically go to the previous cooking cycle and will repeat the previous cooking cycle, press the cancel button to stop and reset the air fryer if desired.

clean the whole unit then replace the thermostat

I would say the thermostat is shutting down to early you need to have the temperature check to see what it is shutting off at .

You don't say what type of fryer you have and that will make a huge difference, however you can also just use a deep fat fryer cleaner and boil it out... Depending on the size/model of your fryer, you will add a certain amount of ths product and then turn your thermostat on to high heat in order to make product boil. After it boils/cleans the unit out, you empty it, and rinse several times, and once all the soap residue is gone, add oil back in... If you have a removable pot, then just take it out and wash it in the sink... I do sell this product, in a powder or a gel...If I can help, please call me at 888-542-5959... Thanks, Susan Restaurant Equipment Outlet
www.restaurantequipmentinc.com

I have a similar model of DeLonghi fryer, and I have read that many customers have problems with their fryers not heating, after owning and using them regularly for some time. Mine gives an error message and stops heating, once in a while. The lights remain on, but it displays an error message on the temperature readout. I've found that detaching the magnetic safety cord and thoroughly cleaning both the cord and the connections on the back of the machine makes a big difference. Your mileage may vary.

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.
If your fryer is set at 350F and over shoots up to 450F (which will trip hi limit and shut down pilot and burner flame), the thermostat is not good, but, if hi limit trips on temperature much lower than 450F, hi limit is bad.

It depends on where it is leaking. If the oil is coming out around the threads where the valve screws onto the fryer, you can remove it and put teflon tape on the threads on the fryer and then put the valve back on tightly. If it is dripping through the valve when it is closed, you need to replace the valve. The only thing you need to match up is that it has the same threads and that it is a high temperature valve. Most Pitco fryers use inch and a half pipe threads. Pipe threads are weird, inch and a half pipe actually measures 1.9 inches outside to outside of the threads. The temperature range is up to 500 degrees F. Check with your nearest restaurant supply company. They can order you a new valve if that is what you need.

it depends on how much fire you put to it...I mean it depends on the amount of charcoal and it depends on how long you want to maintain that temp.

Ok sounds like your problem maybe that the gas valve is set to low. If you have access to a manometer you can put it on the outflow port of the gas valve and see what the reading is. It should be at 4" water column for this fryer. You possibly might even have a faulty gas valve, these will go out sometimes and still let the pilot bypass maintain regular operation. Please comment me back if you need more assistance with this.

Thanks

This is the cause of a faulty thermostat. You may also want to consider replacing the high limit as well if it has tripped more than a few times.