I have had a couple issues with my Searwood's controller. Try keeping the grill plugged in and disconneted and reconnect the wire in back of the controller. It worked for me.
Mine does the same thing. Shoots way over the set temperature and then comes back down. Takes about 20 minutes. I’m getting that from a probe, the temp display on the grill shows it zooming up to the set temperature and then staying there.
mine hits set temp, stays there for a few minutes, then rises to 370, then drops back to set. Takes about 25 minutes total. I wonder if this is to ensure grills are hot? Mimics the advice given on my old summit grill. Maybe a feature?
On my grill (others may be different) if I set 275 it takes about 10 minutes for the display to show 275. The actual temperature is around 350 and over the course of about 10 additional minutes the temperature drops to around 225-250 and settles in there. On my grill I have to set at 330 to get an actual 275. And being a pellet grill the temp bumps up & down 30-50 degrees with occasional bumps of 100 degrees. The display shows a steady 275 the entire time. None of this is a problem but as I prefer to cook to a known temperature I ignore the display on the grill and in the app. All temperatures I’m referring to on my grill were taken with a FireBoard probe clipped to the grate just below the built in probe.
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