Kitchenaid Toaster Oven Parts

An appliance parts supplier might be able to help.

I was able to replace parts on the circuit board (P/N: 128301_timer_pcb) to fix this issue on my KCO253CU Kitchenaid Toaster Oven. R1 was visibly burned. On further troubleshooting, ZD2 was found to be shorted.
Known Failed Parts Replaced:
R1: 47 Ohm 2 Watt resistor
ZD2: 47V Zener Diode
Other Parts Replaced
C1: 1.5 uF 400 Volt Film Capacitor
ZD1: 5.1 V Zener Diode, tested OK but replaced anyway.
See attached photo of circuit board for component part numbers.
John W.

You can't. The lawyers think it is too risky for consumers to attempt repairs. Even those who are competent to do so.

I was able to replace parts on the circuit board (P/N: 128301_timer_pcb) to fix this issue on my KCO253CU Kitchenaid Toaster Oven. R1 was visibly burned. On further troubleshooting, ZD2 was found to be shorted.
Known Failed Parts Replaced:
R1: 47 Ohm 2 Watt resistor
ZD2: 47V Zener Diode
Other Parts Replaced
C1: 1.5 uF 400 Volt Film Capacitor
ZD1: 5.1 V Zener Diode, tested OK but replaced anyway.
See attached photo of circuit board for component part numbers.
John W.

I was able to replace parts on the circuit board (P/N: 128301_timer_pcb) to fix this issue on my KCO253CU Kitchenaid Toaster Oven. R1 was visibly burned. On further troubleshooting, ZD2 was found to be shorted.
Known Failed Parts Replaced:
R1: 47 Ohm 2 Watt resistor
ZD2: 47V Zener Diode
Other Parts Replaced
C1: 1.5 uF 400 Volt Film Capacitor
ZD1: 5.1 V Zener Diode, tested OK but replaced anyway.
See attached photo of circuit board for component part numbers.
John W.

Try this web address for a list of websites that sell oven parts. Hopefully you will find one that carries it.

netshoppers.com/search/index.php?phrase=oven+parts&uid=d5d00793c96dccbcaa9b5f3ca3d412cd&kuid=4c4a6ef184c15b7eeffee322a7d94921&src=7s

Here is an address that will bring a list of sites that carry oven parts. If checking with KitchenAid doesn't help try this:

netshoppers.com/search/index.php?phrase=oven+parts&uid=d5d00793c96dccbcaa9b5f3ca3d412cd&kuid=4c4a6ef184c15b7eeffee322a7d94921&src=7s

ToasterandConvectionOvens.com

You are correct in your diagnosis. The selection switch has 2 sets of contacts that should only make one when on bake. The contacts internal to that fuse are most likely fused together, the other thing that could be going on is a short circuit in the wires to the selection switch causing the same problem. Typically a repair unless under warranty would be costly unless you are up for the challenge of replacing the switch and checking the wiring yourself.

these units do not hold heat good enough to bake properly, sorry

Try smallappliance.com for your parts or just google search "small appliance parts" and you'll see a few places that have B&D parts.