Before anything else, look at the breaker. The HBL5451UC is a 500 Series wall oven, 30 inches wide, that pulls 6,400 watts, and that is a lot to ask of a circuit. When an old oven is swapped out, the wiring behind the wall is usually kept, and the previous oven may have drawn noticeably less.
Inside is a 4.6 cubic foot cavity with pizza, proof, convection roast and convection bake settings, plus touch control and a Sabbath mode. Bosch’s US product page lists it as a current 500 Series single oven, which we confirmed on 23 September 2026.
As it ages, two things come up most. One is a door lock that stays latched after a self-clean. The other is a temperature sensor that slowly drifts, leaving bakes consistently under-done. We check those first, and an electrician should confirm the circuit rating if the oven is new.
Wait until the oven is completely cool, since the lock will not release when it is hot. If it stays locked when cold, turn the breaker off for several minutes. If it still holds, call us instead of forcing the door.
Possibly. Bosch publishes the electrical figure for each model, and it can exceed what the old circuit was built for, so have an electrician confirm it before the installation.
A drifting temperature sensor is a likely cause of consistent under-baking. We can test it and compare the reading with the real cavity temperature before replacing anything.
Book in about a minute, or call the desk. Same-day windows inside the Loop on most days, next-day across the rest of Houston.