Philips REMstar Auto P550 not heating humidifer

[phreddie5]

I have an old Philips REMstar that I'm using at a vacation home and the heated humidifier was not heating, so i bought a new one, that too is not heating up so i get very dry during the night.  The main unit is a REMstar Auto 550P and the blower works fine - is there a way to test if the main unit is no good or a way common reason that it may not be providing power to the heated humidifier: Respironics REMstar Plus Heated Humidifier MPN: 1056215


Thank you!