A5 :: Bed Heating Problem

Hi to all,
this morning I printed a small object with my A5 without problems from the USB flash drive, so I prepared the second (with Cura) but it never starts because the bed did not want to warm up.
The display sometimes showed 25, sometimes 26 degrees Celsius, I realized it was the temperature of the room.
I tried to force the heating of the bed from the display but nothing! always the same room temperature.
I tried to heat a cup of water and put it in any place on the bed, hoping to see any variation on the display, but the temperature never changed.
So I unscrewed the bed, lifted it up a bit and found the connector burned out.

So I used a hot air gun on the connector because it seemed glued; so I disassembled the bed and there was practically a black pin on the bed , and on the connector like if it had melted.

What do you suggest to do?

I thought about doing:
1- clean the burnt pin with a file
2- try to measure the impedance 1-2 and 3-4 and compare it with the value in another post that I found today to check if the bed is still usable

Does this make sense...:
Q1- replace the connector with one that can support a lot of current. (like some small RC / XT60 lipo connectors)?
Q2- change the whole cable with an AWG16 silicone cable?


Thanks inadvance



  • rhaub101rhaub101 Posts: 78🌟 Super Member 🌟
    That is a known problem with the 4 pin connector. You can change the bed and cable to a 6 pin connector that will carry more current or you can remove the 4 pin connector and solder the wires directly to the bed (that was my choice)
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