Hi,
I'm new to 3D printing and bought a CTC dual clone off eBay and am having trouble(s). The seller is useless and will not help so I'm on my own.

It worked very good for two days.
Then the #2 (left) extruder quit. #1 (right) extruder still working.
Then ReplicatorG gCode said it looked for 2 tools but could find only 1. I checked my drivers and have "replicator dual" selected.
Next I started having temperature problems and received "over temp" warning.
Now... every time I start the printer it goes into "high temp, please shut down". and will not re-set.
I disconnected the thermocouple wires from the "hot end" and ohmed them out for continuity, they are not "open". While disconnected machine still gave over temp warning.

I do know a little about electronics (model railroader) and have meters and such but know nothing about 3D machines.

I need help and advice on what to look for next and where to purchase replacement parts.

Thanks,
Don