If you have a Roku streaming stick, I'd recommend ordering a free HDMI extender from our website and seeing if that resolves your issue.
If you are still unable to resolve the issue after following the above steps, please send me a PM with your Roku account email address, and include the serial number of the Roku device from Settings>System>About along with a summary of the issue you are experiencing. I'll be able to assist you further from there.
My Roku is also overheating and has been since out of box. Today I did notice that it remained hot hours after removing from TV, only cooling down after being unplugged from power strip. This is an electrical fire hazard issue and should be addressed and recalled or the company could be held legally responsible for fire damage. I cannot believe after months of issue with it the company has done nothing.
Had the same problem. Good customer service from Roku...bottom line, they replaced my unit with another (a refurb, but so what). Plugged it in with an extender...and the same thing. Not quite as hot as the old one, but still feels very warm, and running around 90C, which I think is high. I have two Fire Sticks and have never had that problem, so it appears to be an issue with the Roku. Like I said, the customer service was good and timely, but I would think there should be a solution to this (tho I suspect that, if it's solved, they'll be replacing a lot of units, if these and other forum postings are any indication).
I had similar problems, occasionally with Amazon Prime, consistently with 4K content (mostly from YouTube). After I received my little HDMI extender from Roku, I plugged it in an arranged it so the Roku Stick was sticking out a couple of inches away from the TV. That seems to have fixed the problem - has run for several hours with no hiccups or dire messages. My guess is that the better airflow when it is not snugged into the back of the TV keeps the temperature down below some critical threshold.
Regarding other comments about the Roku staying warm while plugged in but while the rest of the TV is off, this has to be a fundamental design problem. Hard to imagine a real good reason why they aren't able to put the stick into a very reduced power status when the target TV is turned off. But probably will require a complete redesign to fix.
I have Roku stick Model 3810X. I also have a contract with Caligeeks so when I kept getting this message: "your stick is overheating---contact Roku Support" I contacted Caligeeks. Their advise was to ask for an extender which I did. But they also told me that this is a common problem with that devise and that I should request a replacement stick from Roku. I like this service and would hate to be without it. Also, don't want to reinstall the old unit!
Unfortunately the instructions don't tell you to remove the clear plastic overwrap on the device that keeps it from getting scratched in shipment. If you don't peel off this wrap (you may need to use your fingernail) the device will effectively have a nice (warm) blanket wrapped around it to help it heat up. So first thing to do would be to remove this overwrap.