Verify Heater suspected Thermistor error

After replacing my phaetus rapido hotend with the new version, the rapido hot end 2, the temperature reading is 159°C for the extruder when it's actually at ambient temperature. Also when i try to heat the extruder to 200°C i see the temperature droping before i getting a klipper shutdown with this message :

Klipper reports: SHUTDOWN

Heater extruder not heating at expected rate
See the 'verify_heater' section in docs/Config_Reference.md
for the parameters that control this check.

Once the underlying issue is corrected, use the
"FIRMWARE_RESTART" command to reset the firmware, reload the
config, and restart the host software.
Printer is shutdown

Do i need to reconfigure something or is it a short circuit or something of the sort ?