It seems like a lot to me too. Then again, I’ve never mod’ed a Behmor myself. I can say that the BBQ probe is only rated to 484°F, so its worrisome that its reading that high. Perhaps the quartz elements throw out a lot of heat.
Do you have access to a thermocouple, to see if you’re getting a true reading, or if maybe the BBQ probe is faulty instead?
If it’s a true reading, I’d recommend going to a true thermocouple that is rated for that high of a temperature range. The BBQ would not likely last long being exposed to those temps over time.
I’ve built a new probe protocol for the new version of RM called RDP. It’s possible to make a homemade thermocouple host for $50 USD, give or take. But, it would be a DIY project. It’s still new, and there’s no pre-built hardware yet. I have not had a chance to put up any documentation yet. So, let me know if you’re interested in that.
Of course, Phidgets is another alternative, but pricier.
Let me know if you can verify that reading.