Hotend and bed not heating properly  

Hotend and bed not heating properly

I built everything and it was working fine for the first day then it just broke and I haven't been able to print anything since. What happens is it will be printing fine, both hotend and bed are heating up fine but then after maybe 5 or 6 minutes it decides it has had enough and it just shuts all heating off and I end up getting a thermal runaway error message, after I get the error and try to preheat the bed led doesn't come on and the hotend doesn't heat either. I have a little cheapo multimeter ( with only one function) and when I hold it up to the leads on the bottom of the PSU the meter reads 23.7 on all connections. But when I tested the connectors on the EINSY the measurements come out to be 23.7 on all screws except for the far right pair that the bed are connected to and those 2 read 3.1, I have only printed 3 things and this is my first printer.. go easy on me please

THIS IS SO AGGRAVATING! I spent so much on this printer and I have had it for about 10 days and it has been broken since the first day. I talked to the support team more than 3 times and none of them have been able to come to a conclusion. Then I emailed them, and got back 1 email then nothing since.