Call log template
Copy this into a notebook or a notes app and fill in one block for every call about your HVAC repair issue.
Date and time
Write the date and the start time of the call, and how long you were on hold if it was long.
Who you spoke with
Get a first name, a department and, if they have one, an employee or agent ID.
What was said
Summarize what you asked for and what they told you, in your own words.
Reference number and next step
Ask for a reference or ticket number every time, and write down who is doing what next and by when.