martin_cap_cz

HI, I need help with the bed temperature. The printer starts to heat up the bed, but stops at about 40°C and starts printing. It totally ignores the set temperature (75°C). I tried meassure the PT 100 - it has 116 ohms, so it looks be ok. The heated bed has a resistance of 3.4 ohms. Anyone have any idea where the problem is? Thank you