The best way to avoid a heating emergency is to test your furnace a few weeks before it gets cold.
If you wait until it DOES get cold, you'll find that all the service guys in your area are ridiculously busy...
The same is true for air conditioning when it first gets hot.
Fear not though, even during the super busy times, there is likely an hvac guy somewhere nearby who just had a cancellation or is a little bit ahead of schedule or just started his business and doesn't have a large backlog of existing customers.
Send him a message below.
Be sure to specify what neighborhood you live in and when you are available to let him in.