I found this use of the word «degree» in a sentence of a contemporary American novel. A woman looks discouraged at her old and shabby kitchen. I understand everything except how to interpret the word «degrees». It cannot refer to temperature, because 40° F is too low for the oven to overheat, and the woman lives in Texas where the weather is definitely not cold! What does it mean?
She looked at the cracks in the old subway tile on the counter and the oven that was off by forty degrees. The leaky faucet and sticky drawers.