Do you have access to a multi meter? Its a bit tricky to hold its probes just right and press the trigger to get a reading... Then subract the resistance of the probe leads and you should have something close to the heater resistance
Now all you need the know is what it is supposed to be
Afraid I cant help you there apart from saying I think mine is 0.6 ohms but it was measured a while ago and I had been using Mi at the time so could have been 0.8
I will measure again tomorrow and report.
If if yours is around the same figure then we know the unit is working how it should and it is technique, if it is way off then we know something is wrong with the unit...