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Rooftop AC Package Unit Replacement on a 1970s Fresno Home
Full rooftop package unit replacement
Location: Fresno, CA
Equipment: Goodman 2-ton high-efficiency package unit
Completed: February 2026
The Problem
The homeowner knew last summer was rough.
Their rooftop unit struggled through the worst of it, running constantly and never quite keeping up when temperatures climbed past 100. It got them through the season, but barely. Rather than wait for it to fail in July when every HVAC company in Fresno is booked out, they made the smart call and reached out in February while there was still time to plan.
The existing unit had been up on that roof for decades. At that age, especially after baking through Central Valley summers year after year, repairs stop making financial sense. The gas line, electrical, and condensation line were all original too. Everything connected to the system was as old as the system itself.
The Solution
We replaced the entire setup from the roof down. Not just the unit, but everything connected to it.
The old package unit came off and a new Goodman 2-ton high-efficiency package unit went in on a fresh equipment stand. We ran a brand new gas line with stainless-steel flex connector, installed a new electrical disconnect with seal-tight conduit, and replaced the condensation drain line. Every connection between the home and the new unit was rebuilt.
We also sealed the plenum where the unit meets the ductwork and painted all exterior fittings and the plenum with UV-resistant black paint. That last part is specific to rooftop installs out here, and it's one of the details that determines whether your system holds up through summer after summer or starts deteriorating in a couple of years.
Once everything was connected and sealed, we tested the system in both heating and cooling mode before we left the roof.
The Detail That Sets Us Apart
The Central Valley sun is brutal on exposed materials. Sealants crack, flex connectors degrade, and fittings that look fine after installation start breaking down within a few years if they're not protected. Painting the plenum with UV-resistant black paint adds a protective layer that slows that process down significantly.
Most crews bolt the unit on, connect it, and leave. The rooftop environment is an afterthought. For us, it's part of the job. If we're putting a system up on a roof in Fresno, we're building it to handle what Fresno throws at it when summer hits.
The Proof
We tested the system in both heating and cooling modes before we left. On cooling, supply air temperature came in at 61.2°F, which is right where it should be for a properly charged, properly installed system. Heating mode verified and operational. Gas valve adjusted to spec. This homeowner heads into summer with a brand new system already tested and dialed in, not crossing their fingers hoping the old one holds together for one more year.
6 Signs Your HVAC System Might Be Wearing Out
If your bill keeps going up but your usage hasn’t changed, your system might be working harder just to keep up — and wasting energy in the process.
Uneven temperatures are more than annoying. They’re a sign your system isn’t distributing air the way it should.
Most systems start to decline after 10–15 years, especially in Central Valley heat. If it’s older than your teenager, it might be nearing the end.
A stale, musty odor can signal mold, mildew, or clogged drainage in an aging system.
More dust, dry skin, or sneezing? Your HVAC could be recirculating allergens instead of filtering them out.
If you’re always adjusting the thermostat, your system is likely struggling.
If any of these sound familiar, let’s take a look before it turns into a full-on breakdown.
Real Reviews from
Real Central Valley Customers
We believe great work speaks for itself. Here’s what real customers are saying about Nalk AC and Heating:
“Ruben identified the problem quickly and repaired the issue promptly. He then explained the problem and the repair. He was prompt, courteous and knowledgeable.”
Pete Flores
Google Review
“Great and fast service! Knowledgeable and friendly technicians.”
Isaiah Morales
Google Review
“Juan serviced our furnace and was able to identify and fixed the problems. He went above and beyond to fix the issues. He was professional and informed. Overall I’m very happy I called this company. Will recommend to friends and family.”
Adam Gonzalez
Google Review
“Very knowledgeable in repair work, detailed briefing before starting job.”
Kent MacGregor
Google Review
“Juan was courteous and helpful. He performed the maintenance service in a professional manner.”
Ken Garcia
Google Review
“Great service twice a year! Professional, and very nice service men!!!!”
Judith Brown
Google Review
Why Nalk
Nalk Air Conditioning and Heating has been serving Fresno and Clovis homeowners since 1986. We're veteran-owned, locally operated, and licensed in California (CA License #497476). We give you a clear assessment, walk you through your options, and let you decide. No pressure. No surprises. Just honest work from people who live and work in the same neighborhoods we serve.
Summer is coming. If your system struggled last year, now is the time to get ahead of it. Call us at (559) 277-8448 or schedule your service at nalkacandheating.com.
Fresno winters may be short, but they hit hard. If your heater’s overdue for service—or showing signs of trouble—let’s take care of it before things get worse.
You can call, email, or visit our website to get in touch. Our team responds quickly, shows up ready, and treats your home like it’s their own.
Call: (559) 277-8448Email: info@nalkacandheating.com
Frequently Asked Questions about Heater Repair in Fresno
(559) 277-8448Heater repairs typically range from $150 to $600 depending on the issue. A minor fix like a sensor or flame sensor cleaning might cost less, while replacing motors or control boards can cost more. At Nalk, we’re always transparent about pricing and will walk you through what’s needed before we start.
If your heater is blowing cold air, making strange noises, turning on and off frequently, or causing your energy bill to spike, it’s time to have it checked. Even smells like burning dust could signal the need for a service visit.
Yes. Many issues can be prevented or solved with a thorough heater tune-up. At Nalk, we perform safety checks, cleaning, and efficiency testing as part of our maintenance visits. If we spot something needing repair, we’ll explain it clearly and let you decide next steps.
We respond promptly, often within 24 hours during normal demand. Our technicians arrive ready to diagnose and repair most common problems in a single visit. In busy winter months, we prioritize customers with no heat or safety concerns first.
Yes. We work with all major brands and system types, including gas furnaces, electric heaters, and high-efficiency units. Whether your system is 5 years old or 25, we’ve seen it—and fixed it.
Once a year is best. Ideally in early fall before the cold hits, but January and February are still smart months to catch issues before they become emergencies.
Yes, and proudly so. Nalk is based right here in Fresno. We live where we work, and that means treating our customers like neighbors. No national chains. No corporate gimmicks.
Never. Our job is to give you options and honest advice. If we can safely repair it, we will. If replacement makes more sense long-term, we’ll explain why—but the decision is always yours.
We do. Our twice-yearly service program keeps your system running efficiently and extends its lifespan. Members also get priority scheduling and service discounts.
Nalk Air Conditioning and Heating
4535 N Bendal Ave #105
Fresno, CA 93722
Contact:
Heating Services