The more moving parts, the more chances of failure. I’ve used modems from Arris and netgear and not had any issue with overheating. And I’ve tested a lot of them at over gigabit speeds. 

Maybe the area you have yours placed in doesn’t have airflow? They’re designed to passively cool with the heat rising. but it needs to be in an area that isn’t enclosed. 

Nope, I’ve tested all of them too, and they all fail right around 100 degrees, the way they fail is they just shut off, it’s a safety precaution. Now if your concern is moving parts, there’s an easy solution for that, use solid state technology. For example Frore Airjet solid state cooling systems require no moving at all. And they are flat and small which makes them ideal for modems. I have a fully open area for my modems always to optimize efficiency and airflow.

And by the way, how was this problem not something everyone thought of? What did you think was going to happen when you increase the speed of download? Speed increase leads to more heat, it’s basic physics. And no one thought that going 10x the speed of the last upgrade was going to eventually overheat the electronics? 

I’ve never had a modem fail on me. and the more parts/tech you add, the more expensive it is. I can build a home router that is actively cooled, rocking massive processor/ram/etc but its going to be expensive and users won’t be able to afford it. Arris/Netgear/Etc has to build modems that are cheap enough that users will buy them over the ISP supplied devices, support them for a warranty period, and make a profit. Its a challenge. Not saying its right but its the “just enough” thoughts. 

And again, I’m running 2 gig speeds download and 300mbps upload and never had a failure through mulitple modems. Not sure what you’re doing or if you’re incoming line is to hot (high powered) or what 

Sadly you are the exception and not the rule. I’ve run modems all my life from different companies and they have all hit the very simple to solve bottleneck. Now mind you these modems aren’t cheap, so it’s not like you can say “oh but they have to make a profit.” They are charging 5-8x the amount it actually costs them to manufacture, so they aren’t hurting for money. Plus any additional parts they always pass the costs on to the consumer, so don’t shed any tears for these companies just yet.

I’m not shedding tears for them. I do think they overcharge a bit. 

Have you had your cable line checked? I’ve seen users with their incoming line to powerful and cause overheating/modem failure. 

Got a screensnip of the cable connections page (easier to read)

It’s not the cable line, I’ve had this issue in multiple different homes. I’m telling you I’ve been at this a long time, I know what it is. Furthermore if you want to know how common this is check the forums of literally any modem company, you’ll see this is one of the most common problems. And all the people are always saying things like “Why is my modem constantly disconnecting from regular use?” It’s because regular use was never intended past a certain thermal threshold, which is insane if you think about it. They knew that their gear heats up with speed increases but never compensated for it.

If you check the forums for here and netgear, I’m ranked #1 all time on arris and #3 on netgear for support forums. So I do see users with issues. I don’t need to “check the forums” for how many are reported. Which is why I asked power levels. And other reason you see issues on the forums is because thats where people go with issues. If everything works fine, they don’t need to post anything. Its the same things as if you went to a hospital you’d think everyone is sick or have issues. Its because that's were you go with issues. 

Again, not sure what you’re doing, your setup, your connection, etc but my experience is very different from yours. And I’ve even tested the beta modems that are pre-release for troubleshooting. 

Yes and if in those hospitals everyone comes in with radiation poisoning you don’t check them for a cold. I’ve been doing troubleshooting tech for more than half my life, if you think there’s some cable, or easy fix solution I haven’t tried you’d be mistaken. This is a very real problem, that has existed since the release of modems, but only came to light once we started using bandwidth that was fast enough to make thermals an issue. So you can keep asking me 20 questions about other pieces of hardware that will never be the issue, or you can save us both some time and recognize that this is happening. 

More over you will notice that I didn’t come to this forum and ask how to fix this issue. I knew exactly how to fix it, which is why I never asked. My question is why haven’t they fixed it?

If its such an issue for you, pickup a laptop cooling pad and set it on there. Fixed. 

And cheaper than paying extra for an manufacturer to redo a whole board power supply, add a fan, and a heatsink for efficient fan cooling. 

Once again, it is not an issue for me, I solved the issue by installing a fan myself. The issue is that this happens in every modem and I’d like to know why not a single company including this one is installing them as a matter of default hardware.

Because it doesn’t happen to everyone. 

It doesn’t happen to everyone, but it does happen to enough people to where it has been brought up as a huge issue.