The Channel Everyone Ignores

SMS open rates are 98%. Email open rates in the trades hover around 21%.

That gap isn't a coincidence — it's a behavior pattern. People check their texts. They don't always check their email. And in the HVAC industry, where the difference between a booked job and a lost lead is often measured in minutes, text messaging is the most underused tool in the industry.

The HVAC companies that have figured this out are running 35–50% higher conversion rates on follow-up and re-engagement. They're not spending more on ads. They're just communicating on the channel their customers actually use.

Here are the five texts that are doing the most work.

Text #1: The 60-Second Missed Call Response

When it sends: Within 60 seconds of any missed call, 24/7.

What it does: Stops the caller from dialing your competitor.

The message:

"Hey, this is [Company] — sorry we missed you! We're currently on a job. Can you tell me a bit about what you need? We'll get back to you as soon as we're free."

This isn't rocket science. But the timing is everything. 78% of jobs in the service industry go to the first company that responds. Sixty seconds beats four hours every single time.

The reason most companies don't send this text? They don't have a system to do it automatically. When it depends on a human remembering to send it, it happens maybe 20% of the time — and never at 9pm on a Sunday.

Conversion rate with automation: 35–55% of conversations turn into booked jobs.

Text #2: The Post-Job Check-In

When it sends: 24–48 hours after a completed job.

What it does: Starts a conversation that leads to reviews, repeat bookings, and referrals.

The message:

"Hey [Name] — just checking in. How's the [AC/furnace/system] running since [Tech Name] was there? Let us know if anything feels off."

This text does something that a review request alone doesn't: it makes the customer feel like you care about the outcome, not just the payment. Customers who receive this message are 3x more likely to leave a Google review when asked — because the relationship feels genuine.

It also catches issues before they become complaints. A customer who mentions something doesn't feel right is a service call. A customer who posts a 2-star review is a reputation problem.

Average response rate: 44%.

Text #3: The Review Request

When it sends: 2–3 days after job completion (after the check-in).

What it does: Converts satisfied customers into public social proof.

The message:

"Glad everything's working well! If you have 60 seconds, we'd really appreciate a Google review — they help small HVAC businesses like ours more than you'd think. Here's the link: [direct review link]"

The key elements here: specific time estimate ("60 seconds"), honest emotional appeal ("help small businesses"), and a direct link with no friction. Google reviews require a direct link — if you make the customer search for your profile, most won't bother.

Companies running this text automatically after every job collect 12–20 new reviews per month. Companies relying on in-person asks collect 1–2.

Over 12 months, that's the difference between 15 reviews and 180. At that volume, your Google ranking changes meaningfully.

Text #4: The Seasonal Campaign

When it sends: 6–8 weeks before peak season (spring for AC, fall for heat).

What it does: Fills your schedule before demand peaks.

The message:

"Hey [Name], it's [Company]. Summer's coming fast — wanted to give you first access to our tune-up spots before the rush. We only have [X] openings left in May. Want to lock one in?"

The scarcity element ("only [X] openings") is genuine in most markets — HVAC companies get overwhelmed in May and June, and customers who call in July often wait 2–3 weeks. Letting your existing customers know they can get ahead of that is a real value proposition, not a gimmick.

This campaign, sent to a list of 200–400 past customers, typically generates 40–80 booking responses. At $150–$200 per tune-up, that's $6,000–$16,000 in revenue from a single text sequence — with zero ad spend.

Text #5: The Win-Back

When it sends: To customers who haven't booked in 12–18 months.

What it does: Re-activates dormant customer relationships before they drift to a competitor permanently.

The message:

"Hey [Name], it's been a while! We noticed we haven't seen you since [month] — wanted to check in and see if everything's still running well. If you're due for a tune-up or have anything that needs attention, we'd love to take care of it. We'll even knock 10% off your next visit."

Re-activation campaigns routinely perform better than any cold acquisition channel. These are customers who already trust you, have used your service, and don't have a reason to leave — they just got busy and forgot to call.

A 10–15% win-back rate on a list of 100 dormant customers means 10–15 booked jobs. At an average ticket of $350, that's $3,500–$5,250 from customers who were essentially already yours.

The Problem With Sending These Manually

You're probably reading this and thinking: these aren't complicated. Why isn't everyone doing this?

Because it requires someone to:

  • Know exactly when to send each message
  • Remember every job, every customer, every follow-up window
  • Write and send personalized texts consistently across dozens of customers
  • Never have a bad day or forget

That's a full-time job — and even full-time employees forget.

The businesses running these five sequences reliably are running them through automation. The trigger is automatic. The timing is automatic. The message is personalized using customer data. No one on the team has to think about it.

NorthLine AI handles all five of these sequences. We build them, write them, and connect them to your workflow. Your team focuses on the jobs. The system handles the communication that turns one job into a long-term customer.

Samuel St-Onge is the founder of NorthLine AI, an AI automation company built exclusively for HVAC companies with 1–10 trucks.