HVAC lead follow-up script: call in 5 minutes, name the problem, book; text if no answer
By Sharrk Team · October 24, 2026
The best HVAC lead follow-up script is short: call within five minutes, name the problem the homeowner reported, ask one easy question, and book a visit; if they don't pick up, leave a 20-second voicemail and send a text right away. Sharrk runs that sequence for you, replying to every new form, Angi or Thumbtack lead in under 30 seconds and booking the visit straight onto your calendar.
This guide covers first contact on new leads and the follow-up on an unsold replacement estimate. For inbound breakdown calls, use our HVAC no-heat call script; for selling tune-up plans, see the HVAC maintenance agreement call script.
How fast should you follow up on an HVAC lead?
Within five minutes, and never later than 15. Angi's pro help center says calling leads within 15 minutes more than doubles your chance of connecting with the homeowner, and that a second call raises it by 46%. An older InsideSales and MIT study (presented in 2007) found that calling within five minutes instead of 30 raised the odds of making contact about 100 times. Harvard Business Review research from 2011 found firms that responded within an hour were nearly seven times as likely to qualify the lead, yet in its audit of 2,241 US companies the average response took 42 hours and 23% never responded.
What should you say when you call a new HVAC lead?
Use their name, the problem they typed, one question, then a time. Keep it under a minute. (Names, the company and the phone number in these scripts are examples; swap in yours.)
First call (form fill, Angi or Thumbtack request, or an unbooked call):
"Hi, is this Dana? This is Mike with Northside Heating and Air. You reached out a few minutes ago about your AC blowing warm air, so I wanted to call right away. Is the system running at all right now, or is it completely off? [Listen.] Got it. We can have a technician out today between 2 and 4, or tomorrow morning between 8 and 10. Which works better? [Book.] Perfect. I'll text you a confirmation from this number. If anything changes before then, just reply to that text."
Naming the reported problem shows you read the request, and two arrival windows are easier to answer than "when are you free?"
For an unbooked inbound call (they called, asked about price, and hung up), swap the opener: "You called us earlier about a furnace that keeps short cycling. I didn't want you to be left waiting. Is it still doing that?"
What voicemail should you leave for an HVAC lead?
Leave about 20 seconds with your name, their problem, a time slot and your number, said twice.
"Hi Dana, Mike with Northside Heating and Air, calling about your AC blowing warm air. I can get a tech out today between 2 and 4. Call or text me back at 555-0142. That's 555-0142. I'm also sending you a text now."
What text should you send if they don't answer?
Send it right after the voicemail, from the same number, and make it easy to answer with one word.
Text 1 (right after the missed call):
"Hi Dana, it's Mike at Northside Heating and Air about your AC blowing warm air. I just tried calling. I can have a tech there today 2-4 or tomorrow 8-10. Which works? Reply STOP to opt out."
Text 2 (next morning, if no reply):
"Morning Dana, Mike from Northside. Is the AC still giving you trouble? I have a 10-12 window open today if you want it."
Text 3 (day 3):
"Hi Dana, just checking whether you still need help with the AC or got it sorted. Either answer is fine. Reply 1 to book a visit."
Only text and call people who asked you to contact them, such as a form fill, an Angi or Thumbtack request. The FCC ruled in February 2024 that AI-generated voices count as "artificial" under the Telephone Consumer Protection Act, so AI calls need the same consent as other robocalls. Since April 11, 2025, homeowners can opt out by any reasonable means, and keywords such as STOP, QUIT, CANCEL and UNSUBSCRIBE must be honored within 10 business days.
What HVAC follow-up cadence should you use?
| When | New lead | Unsold replacement estimate |
|---|---|---|
| Minute 0 to 5 | Call. If no answer: voicemail, then Text 1 | n/a |
| Hour 1 | Second call | n/a |
| Same day | Short email with the same two time slots | Thank-you text with the quote summary |
| Day 1 | Text 2 | Call: "Any questions on the options?" |
| Day 3 | Call, then Text 3 | Text: rebates and financing check (below) |
| Day 7 | Final text, then stop | Call or text: "Still deciding?" |
| Day 14 | n/a | Close-out text, then move to long-term nurture |
Angi's help center notes that an email between calls raises contact rate by 16%. For general timing on quotes in any trade, read our guide on estimate follow-up, and see how many times to follow up with a lead before deciding when to stop.
What should you say when following up on an unsold replacement estimate?
Ask what is holding them back, then answer that one thing.
Day 1 call:
"Hi Tom, it's Sarah from Northside. Jake was out yesterday and went over the replacement options for your system. I wanted to see if anything in the quote wasn't clear. Were you leaning toward the heat pump or the gas furnace and AC option? [Listen.] Is it more the price, the timing, or deciding between the two?"
If it's price: "We can walk through financing, or look at whether a rebate in your area brings the number down. Want me to check?"
If it's timing: "Totally fair. Want me to pencil in an install date for later this month?"
Day 3 text (rebates):
"Hi Tom, Sarah from Northside. I checked rebates for your ZIP code. You can see current offers on ENERGY STAR's Rebate Finder, and we can help with the paperwork. Want to set an install date? Reply STOP to opt out."
Can you still mention the federal tax credit on an HVAC replacement?
No, not for new installs. The federal Energy Efficient Home Improvement Credit (Section 25C) is gone: the IRS says it will not be allowed for any property placed in service after December 31, 2025. Remove "$2,000 tax credit" from your scripts, quote sheets and follow-up texts.
Point homeowners to utility and local offers instead. ENERGY STAR's Rebate Finder searches rebates and special offers by ZIP code, including air-source heat pumps, ductless systems, furnaces and smart thermostats. Confirm the program before quoting a dollar amount.
How does Sharrk handle HVAC lead follow-up?
Sharrk's AI voice and text agents run the script above on every lead, 24/7. New leads from web forms, Angi, Thumbtack, Networx, Jobber and webhooks get a reply in under 30 seconds. After hours, a new lead still gets an immediate text or email, and calls wait for your sending window. The voice agent asks about the problem, qualifies the job, and books onto Sharrk's calendar, Calendly, Cal.com or ServiceTitan with real arrival windows. It can also live-transfer a hot replacement lead to your comfort advisor with a private whisper brief.
Strikes handle the cadence: multi-channel follow-up (AI call, text, email, voicemail drop and video text) that starts on a new lead, a tag or a pipeline stage such as "estimate sent," and stops when the homeowner replies or opts out. The AI text agent holds the conversation and can hand it to your cell while the homeowner still sees your business number.
Mako, Sharrk's AI assistant, builds all of this from plain English. Tell it "call every new Angi lead in five minutes, text if no answer, and follow up on unsold replacement quotes for two weeks," and it builds the agent and the Strike, shows every change on an Apply card, and waits for your OK.
See it on the AI receptionist for HVAC page, start free with 2,500 credits and no card, or book a demo.
Related on Sharrk: AI receptionist for HVAC · Speed to lead · HVAC leads cost
Sources
- Angi Leads (HomeAdvisor) Pro Help, Why it's important to call quickly, undated (checked October 24, 2026)
- InsideSales, Lead generation strategies: when to call, when not to call, September 24, 2009, on the 2007 InsideSales/MIT Lead Response Management study (checked October 24, 2026)
- Harvard Business Review, The Short Life of Online Sales Leads, March 2011, figures via SmartCompany, July 4, 2011 (checked October 24, 2026)
- FCC, FCC Makes AI-Generated Voices in Robocalls Illegal, February 8, 2024 (checked October 24, 2026)
- National Law Review, FCC's New Consent Revocation Rule Set to Take Effect April 2025, March 6, 2025 (checked October 24, 2026)
- IRS, FAQs for modification of sections 25C, 25D and others under Public Law 119-21, FS-2025-05, August 21, 2025 (checked October 24, 2026)
- IRS, Energy Efficient Home Improvement Credit, last reviewed April 28, 2026 (checked October 24, 2026)
- ENERGY STAR, Rebate Finder (checked October 24, 2026)
Frequently asked questions
How fast should I call a new HVAC lead?
Call within five minutes and no later than 15. Angi's pro help center says calling within 15 minutes more than doubles your chance of connecting, and Sharrk replies to new leads in under 30 seconds.
What should I say on the first call to an HVAC lead?
Say their name, your company, the problem they reported, ask one easy question, then offer two arrival windows. For example: "You reached out about your AC blowing warm air. Is it running at all? I can have a tech out today 2 to 4 or tomorrow 8 to 10."
How many times should I follow up on an HVAC lead?
Plan on about four to six touches over a week for a new lead, and about five over two weeks for an unsold replacement quote. Mix calls, texts and one email, and stop when the homeowner replies or opts out.
Can I still mention the 25C federal tax credit on a new HVAC system?
No, not for new installs. The IRS says the Section 25C credit is not allowed for any property placed in service after December 31, 2025, so point homeowners to utility and local rebates on ENERGY STAR's Rebate Finder instead.
Do I need consent to text or AI-call HVAC leads?
Yes, contact only people who asked you to reach them, such as a form fill or an Angi or Thumbtack request. The FCC treats AI-generated voices as artificial under the TCPA, and opt-out words like STOP must be honored within 10 business days.