One of the worst times to have a concern with the heating or A/C device is on a holiday.
My brother once had a concern with the gas furnace on Christmas plus he had to spend the whole day separate from any heat because there were no maintenance shops open that day.
I had a similar experience this year while I was in the Super bowl. My partner plus his friends were all enjoying football in the family room. The kids were playing on the patio. Every one of us were walking in plus out of the apartment to talk to the kids plus check out the game. When the apartment started to get colder, I thought it was due to the door being open plus closed so many times. I closed the door plus I told the kids that it was time to come inside. They did not want to stop playing outside, however it was time for some tepid chocolate plus cookies. I figured the apartment would boiling up with the door closed, however the temperatures continue to drop. When I finally checked the control component to look at the indoor temperature, it was 62°. I grabbed my partner plus I told him that there was a concern with the gas furnace. He did not want to leave the football game to deal with the problem, so he told myself and others to call a maintenance service. I contacted 3 unusual sites that day before I found someone to help. Everyone was closed for the Super Bowl plus most sites around here do not offer emergency services. Every one of us were lucky to find someone that could help.