Thermal Switch Prevents Overheating
2511 Series Automatic Reset Thermal Switch
2511F003-201 (Close 120°F min, Open 105°F max)
The 27″ Kitchen Aid double ovens (models: KEBS277DBL4, KEBS277DWH4, KEBS277DAL4) have great features and are wonderful, except the electronics area overheats during it’s cleaning cycle causing the thermal fuse to blow, creating a larger problem than anyone needs. The cooling fan seems to shut off when the oven heat was turned off, rather than when it had cooled sufficiently. Using an automatic reset thermal switch we can keep the fan operating until the oven cools and prevent further damage.
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“What I did was configure a quiet (most important) bathroom vent fan in the cabinet above the oven. I then mounted the thermal switch inside the electronics area on the metal surface of the upper cooling fan duct. I figured this area was the best place to sense the temperature that was affecting the electronics. I used a power terminal (L1) in the oven to supply the power (115v AC) and ran this through the thermal switch, to the fan and back to the the oven’s neutral. The neutral is on the oven side of the thermal fuse that kept blowing. I am sure the fuse is for fire protection so I made sure the fan was wired on the protected side of the thermal fuse. I modified the metal housing by bending a portion of the sloped back up to allow access for the cooling to reach the electronics. The vent fan blows cool air into the oven box that surrounds the oven. The vent fan can be mounted anywhere that is convenient with the air being ducted to the oven box. This adaption has worked great and the electronics stay cooling under all situations. One thing that surprised me was that the blower would sometimes come on about 20 minutes after the oven was turned off.
Thermal Switch Adaption Worked Great and Electronics Stay Cooling
I do not believe I violated any safety issues. After I started having problems I read a lot of angry customer blogs on several web sites so I decided a little experimenting was in order. I am sure I have over built but the parts were cheap and handy. Most of the time the fan does not run. It appears that self cleaning will always cause the fan to start about 20 minutes after the clean cycle starts and it continues to run for about 20 minutes after it ends.”
Our temperature switches work by using a bimetal disc. The bimetal disc in the switch reacts to heat, and opens or closes a set of contacts based on what the ambient temperature is. This is works because the different metals in the disc react to heat in different ways, which causes the disc to bend. In this case the switch turns the fan on when the temperature reaches 120 degrees, and turns the fan back off when the temperature gets down to 105 degrees.
To view our standard temperature options visit our online store.
For more information about our automatic reset thermal switches, contact our direct technical support at 715-831-6353.
