heating failed

[web10]

I got my A20M in earlier this year and was having this problem but had to leave it behind when I returned to collage. whenever I try to start a print it heats up until it stops and displays "heating failed printer halted please reset".
any ideas on what is going on and how to fix it?

[William]

Hi, You can 1. check each wiring;
             2. If you have a multimeter, you can measure the thermistor, hotbed and hot end thermistor on the motherboard.

[web10]

thanks I found that the plugs on the back side of the head were loose while checking voltage works good now.

[William]