I recently purchased a carwash that has a Jim Coleman vac/shampooer combo unit model 94050. Does anyone know what the function of the tank heater is? Is the heater for freeze protection or should the foam be hot in the summer time? If the foam is heated in the summer what temperature should it be? I have tried contacting the Jim Coleman company by phone on a couple different occasions only to be sent to voicemail. No one ever called me back. I also tried emailing them and agian, no one wrote me back. What a way to run a business! Hopefully someone on the forum can answer my question.