Correct. Disclosure is geared more towards any heating oil spills, any water contamination or flooding, termites, lead etc. Known problems for which either have been remedied, or still exist.The only knowledge she has at this point is that all are in good working order. There is no foreknowledge of defects and there is no way of knowing whether a failure will occur in one day or 10 years.
Properly working appliances do not fall under this.