Preparing for HVAC peak season: a 60-day checklist

Why 60 days

Cooling season does not ramp up gently. One hot weekend turns a quiet board into a backlog, and every homeowner with an aging system calls in the same few days. Air conditioning is nearly universal: 88% of US households use it, rising to 93% in the South and 92% in the Midwest^[4]. The companies that do well in that first week are the ones that finished their preparation before it began.

Sixty days is about the lead time of the slowest items on the list: recruiting and onboarding a tech, getting a truck through the body shop and receiving a parts order that includes backordered items. Work backward from the date your peak usually starts, based on your own call history.

The countdown

Staffing and on-call

Hiring is the longest lead item. BLS projects about 40,600 openings a year for HVAC mechanics and installers through 2035^[1], so every company is recruiting from the same pool at the same time. Start early and recruit for the roles you can fill: an experienced tech is ideal, but an install helper or a maintenance tech can free a senior tech for repair calls.

• Write the on-call rotation for the whole season now, with backups for each week.
• Set on-call pay and overtime rules in writing before the first call-out, so nobody argues about them in July.
• Block vacations during the expected peak weeks and approve them in the shoulder seasons instead.
• Plan for fatigue: cap consecutive long days, and make sure techs drink water and take breaks during heat waves.
• Line up a subcontractor or neighboring company for overflow installs if your backlog passes a set number of days.

Do not forget the office. CSRs and dispatchers carry the peak as much as techs do. Cross-train at least one other person to book calls and dispatch, plan lunch cover for the busiest hours and give the office the same heat-wave schedule as the field, so nobody is on vacation in the week the phones explode.

Trucks and parts

1. 01

   Inspect every vehicle

   Brakes, tires, AC in the cab, ladder racks and lights. A truck in the shop in July is a tech without a job.

2. 02

   Standardize the truck stock

   Write a stocking list for the most common summer failures in your area and stock every truck to it.

3. 03

   Order early

   Place the main order 45 days out. Check supplier lead times on motors and compressors, and order refrigerant in the quantities your season needs.

4. 04

   Test the tools

   Recovery machines, vacuum pumps, gauges and leak detectors fail at the worst time. Calibrate and repair them now.

5. 05

   Set a daily restock routine

   In peak weeks, techs restock from the shop each evening or morning against the stocking list.

Phones: the bottleneck nobody plans for

In the first heat wave, phones fail before trucks do. Calls arrive in bursts, hold times climb and callers hang up to try the next company. Calling them back is harder than it sounds: only 19% of US adults say they generally answer calls from unknown numbers^[2]. Web leads behave the same way. In a study of web-lead response, firms that tried to contact leads within an hour were nearly seven times as likely to qualify them as firms that waited even an hour longer^[3]. And homeowners are already frustrated: 53% reported difficulty finding pros in 2025^[5].

Decide before the season how every call gets answered at peak volume:

• Staff the phones to last summer's busiest hours, not the average day.
• Add overflow answering for calls that ring past a set number of seconds: a second office person, an answering service or an AI Employee such as Ava, which answers every call, captures the job and books routine visits into open slots.
• Write a peak greeting that sets expectations: "We are seeing very high demand; we will get your details and give you the earliest time."
• Use a short triage script so no-cooling calls for vulnerable customers, such as older adults or infants at home, get priority.
• Track answer rate and booked rate daily, and fix gaps the same day.

Tell customers before they call

A message sent two weeks before the season prevents dozens of calls in the first heat wave. Keep it short and useful:

• Replace or check the filter now; a clogged filter is a common cause of poor cooling.
• Clear leaves, grass clippings and stored items from around the outdoor unit.
• Check that the thermostat has fresh batteries and is set to cool.
• If the system is not cooling, check the breaker and the thermostat before booking; if it still fails, call us and tell us if anyone at home is elderly, ill or an infant.
• Members: book your tune-up now while morning slots are open.

Send it to members first, then to past customers. It positions your company as the one that helped before the problem, which is the company they call when the problem arrives.

Capacity decisions to make in advance

In the worst week of summer you will have more calls than techs. Decide now, calmly, how you will choose:

1. 01

   Member priority

   Decide what members get: a guaranteed response window, front-of-line booking or waived after-hours charges. Put it in writing and train CSRs on it.

2. 02

   New customer cut-off

   Set a backlog level, such as three days, at which CSRs offer the earliest slot honestly instead of promising same-day service.

3. 03

   Install versus repair

   Decide whether install crews keep installing or switch to repair calls when the repair backlog passes a set level.

4. 04

   After-hours rules

   Confirm which calls justify a night or weekend dispatch and which wait for morning, and make sure the on-call tech and the answering path use the same rules.

5. 05

   Commercial accounts

   Agree response priorities with commercial PM customers before the season, so a restaurant walk-in cooler call is not lost behind residential tune-ups.

Dispatch rules for heat-wave days

1. No cooling with a vulnerable person at home comes first, then no cooling, then partial cooling, then maintenance.
2. Move maintenance visits out of heat-wave days and call those customers to reschedule before they call you.
3. Group calls by area to cut drive time; one extra call per tech per day matters more than any marketing in July.
4. Give honest arrival windows. A missed window costs more goodwill than a later, accurate one.
5. Keep one tech or one slot a day for true emergencies, so the board does not lock up.

Example: what a ready company looks like

Example: a fictional ten-tech company in Kansas City starts its countdown in early April. By mid-May it has hired one tech and one install helper, every truck has passed inspection and the shop holds a summer stock order. The office has tested overflow answering and written a heat-wave greeting and triage script. When the first 95-degree weekend arrives in June, calls more than double for four days. The board fills, but answer rate stays high, maintenance visits are moved without complaints and the backlog clears in a week instead of three.

After the first wave

Hold a 30-minute review after the first heat wave: which calls were missed and why, which parts ran out, which techs worked too many hours and what customers complained about. Fix those before the second wave. At the end of the season, write down what you would do differently and file it with this checklist; it becomes next year's day-60 starting point. In the fall, the slow season plan takes over, and the extreme heat data helps you plan how big next summer's spikes might be.