Problem with temperature readings and dual heaters
I just got my printer running and had a couple of successful prints. However, after cleaning out a clog the temperature control started acting up. Now when I heat my extruder 1 or 2, the temperature read goes up for both of them. Its wierd because they will both read different temperatures that are very close but the extruder that is off is still cold. I did not change any settings or rewire it, so I have no idea what is going on. I have also tested and confirmed that both of the sensors still work
Comments
Also check temperature responses (disable filtering them) there you see set temperatures and read temperatures. If they are close both go up but the inactive only a few degrees. Just like it also goes up when bed heats up the air above.
Can you show the responses to temperature requests? Maybe your firmware is using a unusual format or something is wrong. If E0 and E1 temperatures differ a bit it sounds more like a firmware problem. I agree that only a few degree difference is not heating from neighbourhood except if you have a shared heating block.