Why can’t I find the number in our book?

Once I called the Heating, Ventilation, and A/C corporation, I made a mental note to put the phone number in our phone book

I have this small phone book that I keep on our office desk. I have numbers in there that belong to people I don’t even know who they are. That tells you how old our phone book is. I thought I had every phone number I could ever need in the book. Last week, I realized I was wrong. I was having some concerns with our Heating, Ventilation, and A/C system. I had a lot of dust blowing out of our air vents, but there wasn’t any heating to go with it. I had recently had our heating system serviced, so I knew it wasn’t anything to do with the heating system. I knew I had to have an airflow problem, but I didn’t know what to do about it. I knew I had to call the Heating, Ventilation, and A/C corporation, but I couldn’t find the number. I scoured the entire house, hoping to find a supplier card from the previous year, but to no avail. I then began looking for the phone book I remembered getting in the mail. When I found it, it was useless. The words were so small that I could barely read them, even with our glasses on. I abruptly called a neighbor whom I knew used the same Heating, Ventilation, and A/C corporation. She said she had a magnet on her refrigerator and it boasted the name and phone of the Heating, Ventilation, and A/C corporation. I wrote the number on the telephone pad I kept by our laptop. Once I called the Heating, Ventilation, and A/C corporation, I made a mental note to put the phone number in our phone book. Unfortunately, I had written the number down with a lot of other local numbers. I had no method which number went to the Heating, Ventilation, and A/C corporation.
furnace/heater