I put beef in my crock pot with cream of mushroom soup and an onion soup packet around 1pm. I set it on high for 2hrs and meant to turn it to low. At 3:47 I realized I forgot to turn the setting to low so the crock pot was on the warm setting for about 45mins. My husband thinks its fine, but I am pregnant and have a toddler so I'm a bit concerned and thinking about throwing it out. Is it safe to eat or should I toss it? Thank you!!
The USUAL problem with "warm" (or off/unplugged) on a crockpot is when food that is not hot is placed in one and left on those settings, where it does not quickly warm to a safe temperature range.
If the food was on "High" for 2 hours, it was hot. Depending on the specifics of the "warm" setting on your crockpot, it's somewhere between no risk (warm is 140F or above, maintaining a safe serving temperature) or low risk if for some bizzare reason they set it lower (food would still take a long time to cool below 140 °F, and thus would not actually have been below that temperature for anywhere near the full 45 minutes.)
I honestly can't imagine that a manufacturer would have chosen the second (unsafe) option, but I don't know for sure what your specific model actually does.