Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Guardsman Coil Cleaning: The Hempstead Owner’s Guide
If you’re searching for Guardsman coil cleaning in Hempstead, NY, you likely have a specific part in front of you that’s failed or is underperforming. The most useful thing we can tell you right away: we stock Guardsman-compatible coil cleaning components and can typically complete the replacement within one visit, with installed pricing that usually falls between $180 and $420 depending on your model and what else we find once the panel is off. Most Hempstead homeowners discover this issue through the same chain of events: the AC runs longer than it should, the air feels warmer than the thermostat claims, or the system sounds like it’s working harder with nothing to show for it. Roy Castellanos and our crew have been inside enough Hempstead homes to know exactly what that sounds like, and we’ve fixed it enough times to know what it costs.
Which Guardsman Models This Applies To
Guardsman coil cleaning refers to the evaporator and condenser coils on systems where the filtration side runs Guardsman-branded components, most often the Guardsman media cabinet paired with a 4-inch filter. The coil itself is the part where refrigerant does the actual heat exchange, and it accumulates the same film of dust, pet hair, and airborne grease that your filter catches, just slower. On Guardsman-equipped systems in Hempstead’s older housing stock, the coil is frequently accessed through a tight chase or a closet-style air handler, which changes how we approach the cleaning and what replacement parts fit.
Here’s what matters for compatibility: the coil size is dictated by your air handler or furnace, not by the Guardsman branding. Guardsman components are designed to integrate with a wide range of systems, including units from Lennox, Trane, and Carrier, so the “Guardsman coil” in your home is almost always a third-party coil paired with Guardsman filtration. When a replacement is necessary, OEM and quality aftermarket coils are both viable; we’ve installed both and the decision usually comes down to availability, warranty terms, and exact dimensional match. The advice we give Hempstead owners is simple: measure the coil’s face area and note the refrigerant type stamped on the nameplate. Get those two things right and you avoid the most common mismatch, which is a coil that’s 2 inches too tall for the existing drain pan.
One note for clarity: Hollis Air Duct Hempstead is an independent service provider. We’re not affiliated with Guardsman, but we work with their components on a routine basis and stock common replacement sizes on our trucks.
Styles & brands we work with




Signs Your Guardsman Coil Cleaning Is Failing
- Warm air despite a running system. The blower is moving air, but the coil can’t transfer heat because it’s coated in a layer of compacted dust and debris. This is the most common Hempstead complaint in July and August, and it’s usually been building for years.
- Uneven cooling between rooms. A partially blocked coil reduces total airflow and the rooms farthest from the air handler feel it first. The coil isn’t failing mechanically, but it’s doing far less work than it should.
- Ice forming on the coil or the refrigerant line. A dirty coil can drop the refrigerant pressure low enough that condensation freezes instead of draining. You’ll sometimes notice the system short-cycling or a small puddle where the air handler sits.
- Visible dust or dark film when you open the access panel. If you can see buildup on the coil face with a flashlight, that’s the visible half of the problem. The invisible half is what’s packed into the fins where the air actually moves.
- Higher cooling bills with no change in thermostat settings. A coil running 30% blocked means the compressor runs longer to hit the same temperature. Hempstead utilities are expensive enough without paying for a coil that’s working against itself.
See the difference
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After
Before
After
Before
AfterReplacement Cost & What’s Included
For a standard Guardsman-style coil cleaning with chemical treatment and fin straightening, Hempstead homeowners typically pay between $180 and $280. If the coil is too far gone and needs replacement, installed pricing generally lands between $350 and $420 for a common residential size. That’s parts, labor, refrigerant recovery if needed, and a system test after the work is done.
What drives the cost up? Access, mostly. A coil in a tight attic chase costs more in labor than one in an open basement. Older R-22 systems also trigger extra cost because the refrigerant has to be recovered and handled properly, and R-22 itself is no longer produced, which means any top-off comes at premium pricing.
Every estimate we give in Hempstead is written before work starts, and the number doesn’t move once our technician is in your home. That’s the Garrison Standard: written price, written guarantee. The work is covered by our 365-Day Done Right Promise. If the coil fails within a year due to our workmanship, we return and make it right at no charge, including a free second visit.
DIY or Call Us?
You can check the obvious things yourself: is the filter clean, is the condensate line draining, does the coil look visibly caked when you open the panel? Those checks take ten minutes and a flashlight. What we don’t recommend is trying to clean a coil in place with household spray cleaners or, worse, removing the coil to wash it outside. Coils are fragile. Bent fins reduce airflow. A coil pulled out of the cabinet can kink a refrigerant line, and that turns a $200 cleaning into a $1,500 repair.
Chemical coil cleaners also require proper rinsing and drainage. Spraying a foaming cleaner into a coil and walking away leaves residue that actually attracts more dust. If you’d rather not gamble with a part that your entire cooling system depends on, call us at (516) 559-4917 and we’ll give you a written price before we touch anything.
FAQs
How long does a Guardsman coil last in Hempstead?
A properly maintained coil typically lasts 12 to 18 years on Long Island, where coastal humidity and summer salt air accelerate corrosion on coils near open windows or unconditioned spaces. Systems that run with clean filters and get a coil cleaning every 3 to 5 years tend to hit the top of that range. Call (516) 559-4917 and we can check your coil’s condition.
Can a dirty coil be cleaned, or does it need replacement?
Most coils in Hempstead homes can be cleaned if the buildup is dust, pet hair, and film. When fins are corroded or pitted from years of condensation and salt air, cleaning doesn’t restore performance and replacement becomes the better choice. We’ll show you what we see before recommending either path.
How long does a coil cleaning or replacement take?
A standard coil cleaning runs 2 to 3 hours, depending on access. A full coil replacement usually takes half a day, including refrigerant recovery, new coil installation, brazing, and a performance test. We arrive inside the quoted window and leave the site clean.
Do you stock Guardsman coil parts, or do I need to order something?
We keep common residential coil sizes and Guardsman-compatible filters on the truck. If your system needs a less common coil size, we source it from our supply network and schedule the installation once it’s in hand, usually within a few business days.
Written by Roy Castellanos, Owner, Hollis Air Duct Hempstead at Hollis Air Duct Hempstead, serving Hempstead and nearby areas.