Access was denied . This will have to be rescheduled through our office. There is only access to the thermostats in each store. Security and mall management will not allow us on the roof or into electrical rooms to work. There was no notice from the customer of required paperwork needed to work on site. The stores will have to be added to our insurance and forms filled out to be submitted for approval through mall management before work is allowed. Customer is responsible for the diagnostic fee. I called the main number on file, did not get an answer but I left a voicemail.