What part needs to be replaced when the lcd and controls work but no heat?

A faulty thermostat or temperature sensor could be the cause of your Oster toaster oven's heating element not turning off when ready. You can try the following steps to fix the problem:

• Check the settings for the temperature control: Check to see that the thermostat is not set too high. The heating element may not turn off even when the desired temperature is reached if it is set too high.
• Get the toaster oven clean: Check to see that the toaster oven is clean and free of obstructions. The heating element may occasionally malfunction due to dirt and debris. You can get oven cleaner, https://amzn.to/3xlDd86 .
• Check the temperature: The thermostat or temperature sensor may be defective if the problem persists. To fix the problem, you might need to buy a new thermostat or temperature sensor.
• Contact Oster's support team: You can get assistance from Oster customer service if the problem persists after attempting the steps listed above. They might be able to offer you a solution or point you in the direction of a repair company.

take it in to an appliance repair shop as it may be the elements or thermostat control that is faulty
get a quote as the repair may be more expensive than a replacement unit

The fan probably operated on the heat... I would tackle the THERMOSTATS, heat elements (at least 2) and/or fuse first.

My favorite supplier, appliancepartspros, struck out on Breville
(never-mind) I'll add a couple of credible ones at the bottom.

Sears parts is a good information source... but very pricey ($$$$) for the EXACT SAME PARTS you can get elsewhere...

If you can determine from your OWNERS papers which part you want to try first... get the operating parameters... and and check with a volt meter (ohms scale... power OFF)... for continuity on the FUSE, heaters & thermostat.

There is a possibility your control board (PCB) is at fault... it seems to be getting scarce... Turn it over and look for a burned/broken solder joint.

http://www.ereplacementparts.com/breville-bov800xl-smart-oven-parts-c-116052_116061_116092.html

In any case... get three prices...

In the event that PCB is the issue I do recommend LOOKING TO SEARS because of their parts support and warranty...

Good luck (finding the FUSE).

Breville BOV800XL Smart Oven Parts
Parts and Accessories
Sears Appliance Parts

There is a thermal fuse that breaks power to the heating elements if it gets too hot (somewhere around 173 C. I replaced mine with an identically rated fuse and it was good for a week until I tried to cook twice in succession. I then replaced the fuse with one that trips at around 190C and it's been good for 4 months now. The fuse costs about $6 on ebay (shipping included) and takes about an hour to replace.

I have the same toaster oven and it developed the same problem.
There is a thermal fuse with a 172C trip point. I replaced it with a new part and it worked fine for another week. I replaced it again with a fuse with a 192C trip point and that's been working for a couple of months now. Some pointers for replacing the fuse.

1) you need a Philips screwdriver with an 11" (30cm) shaft to get at the screws behind the control panel.
2) you only need to take off the feet and open the right side (looking at the toaster from the front).
3) The thermal fuse is in a white flexible plastic tube, held in place with a metal bracket.
4) You can pull the old fuse from the wire clamp using 2 pairs of plyers. I re-used the same clamps to connect the new fuse to the existing wires.
5) Replacement fuses can be found on EBAY for about $1.50 (includes shipping from Hong Kong)

I NEED REPLACEMENT ELECTRIC RESISTEANCE FOR TOASTER OVEN MODEL TRO480BS

it is several prosibilites for your problem:
1) the wire of the oven is damaged;
2) the thermostat is decalibrated or damaged;
3) one or more heating element is intrerupted or burned.
solution's:
1) check the wire an replace or repair where is posible whit similar heat resistant wire;
2) replace the thermostat whit similar one;
3) replace the heating element

The heating bar or element needs replacement.you can find it in electrical shop or electronic and electrical supplies in your area.

If you find this answer helpful, kindly vote it.

If the top element is working, then it is either the element, the wiring harness , or the control board.

Since both elements are controlled through the same temperature probe, then the temp. probe should be OK.

The heating element must be removed and tested using a multimeter.

The part is tested disconnecting wiring from element contacts, setting a multimeter to read impedance at Rx1, and reading Ohms on element contact.
If the circuit is open (no continuity and infinite Ohms value), then the element has blown and must be replaced.


If the element has continuity, test the wiring harness, then replace wiring harness or control board.

All the test must be done by a trained repairer, strictly observing all health and safety rules.

Regards.

I would have to say that your issue is thermostat related.  The thermostat only send a signal when temperature is reached, not what the current temperature is.  So if it is malfuntioning, the desired temperature will never be reached.  Therefore, not sending a signal to cut the heat, even though it is 350.