This? 

~1179101

I'll try and fix it.

I tried giving it a gate but it failed due to the pressure since I had to remove the TTAN.

It would be a lot easier if you had made it bigger.

Well you see, the TSNS creates a spark when a particle has a higher tempature then the TSNS particle. So when you activate the hot, the COLD icon is getting a spark from the wire you're suppose to have sparked when cold. However, the wire for the HOT icon is also deactivating the COLD icon, but the "COLD" wire is activating it again, thus causing it to flash.

If there was a gate though, this could be prevented. The problem is that there is so much pressure in the laser that you can't make an easy gate.