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HVAC Services in Old Bethpage, NY 11804
Heating and cooling for Old Bethpage’s post-war ranches, Capes and high-ranches – from boiler service and AC repair to heat pump and ductless upgrades.

Local homesServicesWhere we workCostFAQ
Old Bethpage is a quiet residential hamlet near Bethpage State Park and the Old Bethpage Village Restoration. Most of its homes went up in the post-war decades, and many still have original-era heating layouts that have been updated piece by piece.
Old Bethpage Homes and What They Mean for Your System
- Ranches and high-ranches – single-level ranches often have ductwork in a crawlspace or attic; high-ranches commonly have one level that’s always warmer than the other
- Hot-water baseboard heat – common in homes of this era; circulators, zone valves and expansion tanks wear out long before the boiler does
- Central air added later – many systems were retrofitted into attics with small, leaky ducts; right-sizing matters more than buying a bigger unit
- Oil and gas – some homes still run on oil; if gas is on your street, a conversion is worth pricing
With mature trees on many lots, outdoor AC coils collect leaves, seeds and pollen quickly – a spring tune-up with a coil cleaning keeps them breathing.
HVAC Services We Provide in Old Bethpage
- Boiler and baseboard service – circulators, zone valves and controls
- AC repair and replacement
- Furnace repair and replacement
- Heat pumps and ductless mini-splits
- Oil-to-gas conversion
- Seasonal maintenance and 24/7 emergency service
Where We Work in Old Bethpage
We cover Old Bethpage (ZIP 11804), including the neighborhoods around Bethpage State Park, Round Swamp Road and the Old Country Road corridor. It’s a short drive from Hicksville, so same-day appointments are usually possible.
What Old Bethpage Homeowners Pay
Installed prices on Long Island typically run $7,000–$17,000 for a central AC replacement on existing ductwork, $14,000–$28,000+ for a ductless system depending on zones, and $14,000–$25,000 for a full system or heat pump conversion. See HVAC installation cost for what drives the number – we give you a firm, written price after a walkthrough.
Old Bethpage HVAC FAQ
Why does my baseboard heat bang or gurgle?
Usually air in the loop or a failing expansion tank. Bleeding the zones and checking the tank pressure often solves it – we check both during a heating tune-up.
My high-ranch is hot upstairs and cold downstairs – what fixes that?
Balancing the ducts, adding a zone, or adding a ductless head to the warm level usually evens it out. We’ll measure before we recommend anything.
Is it worth converting my Old Bethpage home from oil to gas?
If National Grid gas is already on your street, often yes – especially if your oil tank or burner is aging. We’ll give you a real number so you can compare.
How a Service Call Works
No call-center runaround and no surprise invoices. Here’s exactly what happens when you call us.
Call or text us
Reach us at (516) 930-5483 any time. Tell us what’s happening and we’ll give you a realistic arrival window.
We find the real problem
A licensed technician tests your system and shows you what is wrong – in plain English.
You approve the price
You get a clear, upfront price before any work starts. Nothing happens without your OK.
It gets done right
We complete the repair or installation, test everything and walk you through what we did.
Get a Straight Answer in Old Bethpage
Call or text (516) 930-5483, or email cs@hicksvillehvac.com. We’re licensed, insured and local – with same-day appointments and 24/7 emergency service – and we’ll tell you what’s actually wrong before we touch anything.