HVAC is the most seasonal trade in home services, and the seasonality is not gradual. It is a step function: a mild week, then one hot day, then four hundred calls. Everything useful you can do with messaging follows from that shape.
The pre-season message is the whole business
Every job you book in April is a job that does not need booking in July, when you cannot fit it in. Pre-season tune-up campaigns are the highest-leverage messaging in this trade, and the window is roughly three weeks before the first real heat.
Bell Heating & Air
iMessage
Hi Marcus — Dana at Bell. We serviced your AC last May. Booking spring tune-ups now: $89, about an hour, and it's the difference between finding a bad capacitor in April and finding it in July. Tuesday or Thursday next week?
thursday works. morning if you have it
That message works because it is genuinely useful rather than promotional. The customer knows the July version of this conversation is a $2,800 emergency replacement and a week without air conditioning.
The first hot day
You will not reach everyone. Say so, early, specifically.
The instinct is to go quiet and work the backlog. That is the choice that generates the reviews. A same-day message saying we are booked through Thursday, you are number 14, here is what to try in the meantime keeps a customer who would otherwise call your competitor at hour three and leave a review at hour six.
| Situation | What to send |
|---|---|
| Booked out 3+ days | Their position in the queue and a realistic date, not a vague apology |
| Vulnerable household | Prioritise, and say you are prioritising — elderly, infant, medical |
| Waiting customer | A daily update even when nothing has changed |
| Cancellation opens | Offer it to the queue by message; first reply wins |
| Simple fixes | Filter, breaker, thermostat batteries — some of them self-resolve |
The last row genuinely reduces your call volume on the worst day of the year. A short 'before we come out, check these three things' message resolves a meaningful share of calls and costs you nothing — and the customers it does not help now trust you more.
Filling cancellations from a waiting list by message is the same mechanic as a restaurant filling a Saturday cancellation, and it works for the same reason: a short window, a specific offer, first reply wins.
Maintenance plans are recurring revenue with a renewal problem
Plans are the best thing in this business — predictable revenue, priority scheduling, and a reason to be in the house twice a year. They churn silently because the customer forgot they had one.
- Both visits scheduled by message, not left for the customer to remember.
- A short summary after each visit — what you checked, what you found, a photo. This is the evidence the plan is worth paying for.
- A renewal message 30 days out that names what they got: two visits, one part replaced, priority in July.
- A save message if they decline, offering the plan at the same rate for one more year rather than losing the relationship.
The recurring-service mechanics generalise across trades — the HVAC-specific part is that the value of the plan is invisible until the equipment fails, so the after-visit summary is doing the persuading.
Repair or replace
The highest-stakes conversation in the trade. A 14-year-old unit with a failed compressor is a genuine judgement call, and homeowners are primed to suspect they are being upsold.
Message the numbers, do not pitch them. Repair cost, remaining expected life, replacement cost, the efficiency difference in dollars per month, and any rebate that applies. Send it as text they can read twice and show a partner — then call. A quote a customer can re-read converts better than one they heard once while standing in a hot hallway.
What to measure
- Pre-season tune-ups booked, as a share of last year's customers.
- Peak-day cancellations refilled from the waiting list.
- Maintenance plan renewal rate.
- Repair-to-replace conversion, and how many are decided the same day.
- Reviews mentioning communication rather than the fix itself.