You set up a Google Ads campaign for “AC repair,” and a few weeks later the clicks are rolling in. The phone, though, is mostly quiet. You open the search terms report and find people who searched for “AC repair technician salary,” “how to become an HVAC tech,” “free AC repair manual,” and “HVAC jobs near me.” Every one of those clicks cost you money. None of them were ever going to book a service call.
This is one of the most common and most fixable leaks in HVAC advertising. For a 1-4 truck company with a modest budget, a handful of wasted clicks each day can add up to a meaningful monthly bill. Negative keywords are how you shut that leak.
This article explains what negative keywords are, which ones HVAC contractors should start with, and how to review them without turning it into a second job.
What Negative Keywords Actually Do
When you bid on a keyword like “furnace repair,” the ad platform may also show your ad for searches it considers related. That broader matching can be helpful, but it also means your ad can appear for searches you never intended.
A negative keyword is an instruction that says, “Do not show my ad when the search includes this word or phrase.” If you add “jobs” as a negative keyword, your ad will not appear for “HVAC jobs near me.” Simple, but powerful.
The goal is not to make your reach as small as possible. The goal is to keep your budget focused on homeowners who are ready to hire a contractor, so more of your clicks turn into calls.
Start With the Job Seekers and Learners
The first group of wasted clicks usually comes from people who want to work in HVAC or learn HVAC, not hire it. Common negative keyword themes include:
- Employment: jobs, careers, hiring, salary, apprenticeship, internship, resume
- Education: school, training, course, certification, license, classes, exam
- Do-it-yourself: diy, how to, manual, tutorial, youtube, instructions, pdf
- Parts and wholesale: parts, wholesale, supply, supplier, distributor, buy online
Be thoughtful with that last group. If you sell parts or want DIY customers, you would handle it differently. For most small repair and replacement shops, though, these searches rarely turn into booked service calls.
Filter Out Searches Outside Your Services
Every shop has work it does not want. Think about what you do not offer and what you would rather not take on. Depending on your business, that might include:
- Commercial or industrial work if you only do residential service, such as “rooftop unit” or “chiller”
- Appliance repair if you do not service refrigerators or washers
- Car air conditioning since “car AC repair” is a very different search from a home system
- Brands you do not service, if you specialize
Review your own service list and write down what you never want to dispatch a truck for. Those become negative keyword candidates.
Watch the Price-Only and Free Searches
Some searches signal someone who is not ready to hire. Words like “free,” “cheap,” “coupon,” or “cost to build” may be worth excluding, depending on your offers. A caution is worth making here: price-related searches are not always bad. A homeowner who types “AC replacement cost” may be a real buyer doing research. You should decide based on your own results, not a blanket rule.
A good approach is to start cautious. Add the clearly irrelevant terms first, then watch the price-related searches and see whether they produce booked jobs. We cover how to measure that in the tracking section below.
Use the Search Terms Report Every Week
The most reliable source of negative keywords is not a list from the internet. It is your own search terms report, which shows the actual phrases people typed before clicking your ad.
Here is a simple weekly routine that takes about fifteen minutes:
- Open the search terms report for your campaigns.
- Sort by cost, highest first.
- Scan for searches that clearly do not match what you sell.
- Add those words or phrases as negatives.
- Note anything unclear to watch for another week.
Doing this regularly matters, because new irrelevant searches appear all the time. A list you build once and forget will slowly fall behind.
Understand Match Types Before You Add Anything
Negative keywords have match types, and choosing the wrong one can cause trouble.
- Broad match negative: blocks the ad if all your negative words appear in the search, in any order. It is the loosest.
- Phrase match negative: blocks the ad when the exact phrase appears in that order, with other words allowed before or after.
- Exact match negative: blocks the ad only when the search is exactly that phrase and nothing else.
The risk is accidentally blocking good traffic. For example, adding “repair” as a broad negative would be a disaster for a repair company. Adding “air conditioning school” as a phrase negative is much safer. When in doubt, use phrase or exact match for specific phrases and keep single-word negatives for clearly irrelevant terms such as “salary” or “diy.”
Separate Emergency and Replacement Campaigns
Negative keywords also help you keep your campaigns from competing with each other. A repair campaign aimed at “no AC” and “furnace not working” searches is aimed at urgent buyers. A replacement campaign aimed at “new AC installation” is aimed at planners.
If both campaigns can show for the same search, you lose control over which ad and landing page the homeowner sees. Cross-negatives help here: exclude “replacement” and “install” phrases from your repair campaign, and exclude “repair” phrases from your replacement campaign. This is also a good reason to think carefully about the difference between these two groups. Our article on repair calls versus replacement leads explains why they behave so differently and why they deserve separate treatment.
Do Not Forget the Landing Page
Negative keywords reduce bad clicks, but they cannot fix what happens after a good click. If a homeowner who is ready to call lands on a cluttered homepage, you can lose them anyway. A focused HVAC landing page with a clear phone number and short form gives each paid click its best chance to turn into a call.
Think of it as two filters working together. Negative keywords keep out people who were never going to hire you. A good landing page helps the people who were ready to hire you actually take the next step.
Measure What Really Happened
A click is not a result. A booked job is. Here is where many shops get stuck: they trim negatives based on how searches look, not on what those searches produced.
Suppose a search phrase brings in six clicks and two calls, and one of those calls becomes a booked repair. That phrase may be worth keeping, even if it sounds a little off. On the other hand, a phrase that costs a lot and never produces a call is a strong candidate for removal.
To make decisions like this, you need to see which searches and ads led to which outcomes. That is where LeadTable tracking helps. It records leads, call details, outcomes, sources, and follow-up status in one place, so you can connect spending to booked work instead of guessing.
Protect the Calls You Do Pay For
Trimming waste is only half the job. The other half is making sure the good clicks do not leak away after the phone rings. If your calls go to voicemail in the evening or while the crew is out, you can end up paying for a click and then losing the caller anyway.
Gracie, the AI receptionist, answers calls 24/7 or on your schedule, gathers the caller’s name, phone number, address, HVAC problem, and urgency, and transfers the call or texts the details to you. When your ad targeting is clean and every call is answered, your budget works harder from both ends.
A Starter Checklist
If you want something to do this week, try this short list:
- Pull your search terms report for the last 30 days.
- Add job, training, and DIY negatives.
- Add negatives for services you do not offer.
- Set up cross-negatives between repair and replacement campaigns.
- Choose match types carefully, avoiding broad single-word negatives that could block real buyers.
- Put a recurring fifteen-minute review on your calendar.
- Check which search terms actually led to booked jobs, not just clicks.
Results depend on your market, budget, and how your campaigns are set up, so treat this as a starting framework rather than a guarantee. Still, many contractors find that cleaning up their search terms is one of the quickest ways to make an existing budget go further.
Ready to Make Every Ad Dollar Count?
MicroManaged Media, Inc. created Get Calls AI to help small HVAC contractors get more qualified calls, miss fewer opportunities, and see which marketing turns into booked work. If you want help tightening your campaigns, you can start with our HVAC PPC advertising service.
Contact MicroManaged Media today and we will talk through your current ads, where your clicks may be leaking, and what a cleaner setup could look like for your shop.