Dreamer temperature problems

[forest428]

I've just replaced 2 new nozzles and my Dreamer start having new problems with preheat temperatures.
Both nozzles in preheat, load and print modes can't seem to heat up to the set temps. At all time, the nozzles' temps stay from 5 to 7 degrees below the set temps (I tried from 200 to 250 degrees). It takes forever for the machine to begin loading filaments (keep timed out after 5 minutes) or start printing (takes 30 to 50 minutes to begin).
Any idea why?

[soofle616]

By nozzles do you mean just the brass pieces that screw in? If so those have little or nothing to do with heating. They are the parts that get hot, yes, but heating is done through the resistor in the hot end and monitored by a thermistor, also in the hot end. You should see 4 wires coming out of the heater block just above the brass nozzles. It's possible that while replacing the nozzles you damaged the thermistor and/or the wires running to it or the resistor.