Qidi X-Smart Not Reading Hotend Thermocouple Temperature - Please Help

[malikilam]

Hello,

I have a Qidi X-Smart printer. It is not reading the temperature of the thermocouple on the hotend, or, rather, the software shows a temperature of 600+ degrees (fahrenheit) whether the thermocouple is connected or not.

Remedies I have tried so far:

1) Replace the theremocouple (first with a generic one from Amazon, then with an OEM replacement from Qidi). Result: No change
2) Replace the breakout PCB board to which the thermocouple connects. Result: No change
3) Re-seat the thermocouple in the hot end. Result: No change
4) Replace the ribbon cable that connects the breakout PCB to the main board. Result: No change
5) Software "factory reset". Result: No change

Prior to experiencing this problem I had a blockage of filament in the hot end. Once I remedied that, the current (thermocouple) problem started.

I took the printer to the local 3d printer repair shop. After a month they hadn't come up with a solution or even a diagnosis, so I took the printer back and tried replacing the parts listed above. I would think if the problem was something obvious, they would have figured it out quickly.

Any help, insight or hypothesis to be tested will be much appreciated.

All the best.

[LePaul]

The reviews I have seen on that machine have rated it poor, at best.

It sounds like you've tried all the reasonable fixes. I would cut your losses and junk it