What is error E05?

Question

Breville BOV800XL toaster oven

The Smart Oven® with Element IQ® is a trustworthy tool for the cook who wants a countertop oven that roasts succulent meat, broils, bake pizza, reheas leftovers and toasts evenly. Convection setting reduces cooking time by up to 30%. Model: BOV800XL

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SleepingIn @sleepingin

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crwdns2931729:0crwdne2931729:0: Mud 4, 2023

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What is error E05?

I tested almost everything in this oven, but I never had a manual or documentation for the BOV800XL /A. The thermal fuse was continuous, the transistors, triacs, variable resistors, resistors, capacitors, etc. seemed fine. I did not check the transformer or relays. Here is a link to a version of the manual that vaguely describes the errors on page 54. My continuity test showed that the old oven sensor reads at about 125 kΩ at room temperature. Other sources say it should be in the range of several thousand ohms. Any suggestions/sources for E05 error code?

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@nathantafelsky E05 should be a failed Triac

crwdns2934271:0Mud 5, 2023crwdnd2934271:0 oldturkey03 crwdne2934271:0

If it read at 125kΩ then it might be a faulty sensor. A functioning oven sensor should read in the range of several thousand ohms at room temperature,

crwdns2934271:0Mud 5, 2023crwdnd2934271:0 Pookie crwdne2934271:0

@oldturkey03 Both triacs had the same resistance across their anode-to-cathode, I think the triacs are fine. They don't show any signs of overheating, and current only flows in the direction it is supposed to.

crwdns2934271:0Mud 9, 2023crwdnd2934271:0 SleepingIn crwdne2934271:0

Successful update:

I replaced the temperature sensor, and now it works. It actually threw the E05 error once or twice shortly after replacement, then never again. The sensor itself looked exactly like the old one. The wire connector was wrong (black, not white and wrong shape), so I soldered the old one on with heatsink. I assume it is a resistor and therefore works in any direction.

Then I began testing.

I was able to cook toast (the default setting, medium, 5 minutes). Then, I did it again and then the E05 error was thrown. I unplugged the oven, held the power button for 15 seconds. I tried one or two other settings. I was holding my hand on the triad head sinks for the first few tests. They can get too hot to touch for 10-20ish seconds at a time. Shortly after, the E05 error was thrown again when I was tapping on the relay (seems to directly affect Start/Cancel).

I ran it on various high settings like largest frozen pizza, 20-minute roast, et cetera and it has not thrown the E05 error again.

crwdns2934271:0Kho 28, 2025crwdnd2934271:0 SleepingIn crwdne2934271:0

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SleepingIn @sleepingin

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crwdns2931729:0crwdne2931729:0: Mud 9, 2023

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Error code E05 on the Breville BOV800XL toaster oven is a fault code that indicates a problem with the oven's temperature control system. The purpose of this error code is to alert the user that there is a problem with the oven's ability to regulate temperature and maintain safe operating conditions. The specific cause of the E05 error code can vary, as it can be triggered by a variety of different issues, such as a faulty temperature sensor, control board failure, or wiring issues. However, the purpose of the error code remains the same: to notify the user that there is a problem with the oven's temperature control system and that action is required to address the issue.

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Thanks for this explanation!

crwdns2934271:0Kho 14, 2023crwdnd2934271:0 Holly Elwira Winnie crwdne2934271:0

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If it read at 125kΩ then it might be a faulty sensor. A functioning oven sensor should read in the range of several thousand ohms at room temperature, — Pookie
@oldturkey03 Both triacs had the same resistance across their anode-to-cathode, I think the triacs are fine. They don't show any signs of overheating, and current only flows in the direction it is supposed to. — SleepingIn
Successful update:

I replaced the temperature sensor, and now it works. It actually threw the E05 error once or twice shortly after replacement, then never again. The sensor itself looked exactly like the old one. The wire connector was wrong (black, not white and wrong shape), so I soldered the old one on with heatsink. I assume it is a resistor and therefore works in any direction.

Then I began testing.

I was able to cook toast (the default setting, medium, 5 minutes). Then, I did it again and then the E05 error was thrown. I unplugged the oven, held the power button for 15 seconds. I tried one or two other settings. I was holding my hand on the triad head sinks for the first few tests. They can get too hot to touch for 10-20ish seconds at a time. Shortly after, the E05 error was thrown again when I was tapping on the relay (seems to directly affect Start/Cancel).

I ran it on various high settings like largest frozen pizza, 20-minute roast, et cetera and it has not thrown the E05 error again. — SleepingIn

Kelsang Rinzin @kelsangrinzin crwdns2934065:0crwdne2934065:0: 13 1 · Answer 1 · 2024-03-20T13:53:29-07:00

Kelsang Rinzin @kelsangrinzin

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crwdns2931729:0crwdne2931729:0: Kul 20, 2024

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I got this code while baking a cake, but also on the same circuit, I turned up an induction cooktop to max. I turned off the cooktop, and unplugged and replugged the toaster oven, and then it was fine.

So this error could possibly happen if something goes weird on your electricity for a moment.

Thank you to the others who explained what the error means.

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I have had this problem with mine since I got it. Have to repeatedly unplug/plug in. Repeat. Seems to happen in “Bake” mode. I think it’s a bum unit. I got it cuz the older one had a “start” button issue develop that took up to 6 or 8 times to go on. But at least it STAYED ON!!! I love the oven otherwise. It is big enough on the inside for a decent size rectangular baking dish. But annoying and have to stay on it to unplug/pug. I consider dumping it.

crwdns2934271:0Mha 8, 2024crwdnd2934271:0 lesliedimattia crwdne2934271:0

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SleepingIn @sleepingin crwdns2934065:0crwdne2934065:0: 193 5 1 · Answer 2 · 2025-06-28T14:44:35-07:00

Successful update:

I replaced the temperature sensor, and now it works. It actually threw the E05 error once or twice shortly after replacement, then never again. I am unsure if there is a break-in period for oven sensors...

The sensor itself looked exactly like the old one. The wire connector was wrong (wrong shape and color), so I soldered the old one on with heatshrink wrap. I assume it is a resistor and therefore works in any direction.

I noticed that tapping on the white relay can be enough to turn off the heat or do some weird stuff (like possibly throw E05), and seems to be directly correlated with the start/cancel button.

Then I began testing.

I was able to cook toast (the default setting, medium, 5 minutes). Then, I did it again and then the E05 error was thrown. I unplugged the oven, held the power button for 15 seconds. I tried one or two other settings. I was holding my hand on the triad head sinks for the first few tests. They can get too hot to touch for 10-20ish seconds at a time. Shortly after, the E05 error was thrown again when I was tapping on the relay (seems to directly affect Start/Cancel).

I ran it on various high settings like largest frozen pizza, 20-minute roast, et cetera and it has not thrown the E05 error again.

Also, the old oven sensor seemed to float, like my multimeter did not want to settle on any particular reading. (66kohm-120ishkohm). It was probably about 80*F in the workspace. The new sensor was exactly 99kohm and the multimeter did not struggle to settle on a value. — SleepingIn

Breville BOV800XL toaster oven

What is error E05?

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