108 degree cold bed

[Generic Default]

Hi,

For a few days now my onyx thermistor has been reading 108.57 degrees, although it fluctuates between 107 and 109 sometimes. The problem is that it's actually about 21 degrees. I checked the thermistor wires where under the onyx, and it looks like they are fine and not touching each other. Has anyone else had this problem? It seems like it just came out of nowhere, and I can't find a reason for it to be registering as 108 degrees. I can't use the bed until I fix the temperature reading.

[Captain Starfish]

Can you pop the connector and measure the resistance at room temperature, then swap the hot-end and bed thermistor connectors around and run the bed for a couple of minutes before measuring it again?