Geeetech

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?

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.

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