The first screen has to answer whether you can get to the house today
A visitor with no heat is asking a coverage question and a timing question, and every other element on the page is standing in front of the answer.
Put a tappable phone number, the towns and counties you dispatch to, and your current availability in the first screen. On a phone that screen is small, and a hero video, a rotating slogan or an award badge eats all of it.
Name what you fix in plain words. Boilers, steam, forced air, ductless. The owner of a greystone with radiators has been on four sites already that only talk about air conditioners, and they will not read to the bottom of a fifth.
Availability stated honestly beats availability implied. A line saying you are answering calls now, or that the next opening is Thursday with an emergency line for no heat, is more persuasive than a promise everyone makes.
Do not bury the after-hours number in a footer. In January it is the most valuable link on the site.