"Called them for Heat Pump Maintenance in Hicksville and they were fast and did a very thorough work."
Sucharu Subedi
Hicksville, NY · Heat pump maintenance
5.1 miles from our Levittown HQ
HVAC repair & installation in Old Bethpage, NY
Old Bethpage's larger lots and historic homesteads near the Restoration Village often have detached garages, pool houses, and additions that need separate mini-split zones. We design and install ductless cleanly. We bring trucks fully stocked with parts for every major brand serviced in Old Bethpage, so most repairs are completed on the first visit.
Same-day appointments available
Fully insured
Local crews, fast response
About HVAC service in Old Bethpage
Old Bethpage homes are generally larger and newer than the tract housing south of it — more 1960s and 70s splits and colonials on bigger lots, with finished basements and additions that came later. The recurring issue is a single-zone system trying to condition a house that has effectively grown since it was sized. ZIP 11804, 5.1 miles from our Levittown shop.
Complete service menu
Every HVAC service we offer in Old Bethpage
All 13 services available across Old Bethpage — usually same-day for repairs, free in-home quotes for installs.
AC Repair in Old Bethpage
cooling · repair
Same-day cooling repairs most days across Long Island.
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AC Installation in Old Bethpage
cooling · install
High-efficiency central AC, sized and installed right.
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Ductless Mini-Split Installation in Old Bethpage
cooling · install
Room-by-room comfort with no ductwork required.
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AC Maintenance & Tune-Up in Old Bethpage
cooling · maintain
Annual tune-ups that prevent breakdowns and extend equipment life.
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Heating Services in Old Bethpage
heating · repair
Furnaces, boilers, and heat pumps — repaired, serviced, replaced.
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Furnace Repair in Old Bethpage
heating · repair
Emergency furnace repair, day or night.
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Furnace Installation in Old Bethpage
heating · install
High-efficiency furnaces that lower your gas bill.
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Boiler Repair & Installation in Old Bethpage
heating · repair
Boiler repair, cleaning and installation — steam, gas & combi.
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Heat Pump Installation in Old Bethpage
heating · install
Heat pump repair and installation — ducted & ductless.
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Water Heater Installation in Old Bethpage
heating · install
Tank, tankless, and heat-pump water heaters — installed right.
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Whole-Home Generator Installation in Old Bethpage
heating · install
Standby power sized and installed on Long Island.
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Emergency HVAC Repair in Old Bethpage
heating · repair
No heat. No AC. No waiting.
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Emergency Boiler Repair in Old Bethpage
heating · repair
Cold radiators. Leaking boiler. Call any hour.
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What we see in Old Bethpage
Common HVAC issues by season
We regularly service Old Bethpage year-round. Here's what tends to fail and when.
Summer in Old Bethpage
- Outbuildings with no cooling — Detached garages, pool houses and workshops sit outside the main duct system and bake in summer unless they get their own dedicated cooling.
- Bonus rooms over garages — Rooms over a garage sit away from the main duct system and take heat from the roof above, which makes them one of the most common comfort complaints in Old Bethpage.
- Sunroom glass load — Large windows and a separate roofline pull in sun that a central system was never sized for, so a sunroom stays warm through the afternoon.
- Oversized or aging central AC — Systems sized before the house grew either short-cycle or can't keep up, wasting runtime and leaving humidity behind.
Winter in Old Bethpage
- Workshop and garage heat — A detached garage or pool house used as a winter workshop was never on the house system, so it needs its own heating, and a ductless zone can provide it independently.
- Older burners on oil blocks — Clogged nozzles and worn electrodes cause most cold-night lockouts on the Old Bethpage streets where oil is still the fuel.
- Large homes, one thermostat — One thermostat on one floor cannot represent a big colonial. Some rooms overheat before others reach setpoint.
- Aging furnaces and boilers — Older heating equipment from the original build fails at ignition and control components, particularly under the demand of added square footage.
Deep dive · Old Bethpage
Ductless mini-split installation in Old Bethpage, NY
Old Bethpage's larger lots come with the structures that main HVAC systems were never sized for: detached garages, pool houses, sunroom additions, and finished attics over the original footprint. Extending trunk ductwork to those spaces usually starves the rest of the house. A dedicated ductless zone is cheaper, quieter, and doesn't touch the existing system.
Additions and sunrooms
Glass-heavy rooms need their own capacity. A 12k–18k BTU wall head holds temperature in a sunroom that the main system can never satisfy.
Detached garages and pool houses
We run buried or exterior-rated line sets, and the outbuilding gets its own dedicated circuit, so it heats and cools independently, including winter workshop use.
Bonus rooms over garages
The single most common comfort complaint in Old Bethpage. One head, one day, no ductwork, roughly $4,200–$5,900 installed.
Clean exterior work
Line-set covers painted to match the siding, sealed wall penetrations, and pad-mounted or wall-bracket condensers set level and out of sight lines.
Central AC sizing and zoning in Old Bethpage
This hub covers ductless in depth and our Old Bethpage furnace page covers heating. Central cooling is the gap, and on these larger floor plans sizing and zoning are the whole conversation.
Manual-J sizing
We calculate load room by room rather than matching the old nameplate, which on an expanded house is almost always wrong.
Zoning for splits and colonials
Two-zone dampers or a second system for upstairs, decided by measured airflow rather than a rule of thumb.
AC replacement cost
Full system replacements on these larger homes typically land in the upper half of our published 2026 range; we quote after the load calc.
Finished basement loads
Basements added after the original install rarely got supply and return capacity. We correct distribution before upsizing equipment.
Why Old Bethpage chooses us
Local Long Island knowledge — not a national chain.
- Just 5.1 miles from your front door — fast trucks, low fuel surcharges
- Trucks fully stocked with common parts — most repairs done first visit
- Honest, upfront flat-rate pricing — no surprise add-ons after the work starts
- Fully insured, EPA 608-certified technicians
- Full scope in writing before you sign
- 1-year warranty on every repair · up to 10-year parts on installs
EPA 608
Every technician
24/7
Emergency dispatch
Fully
insured
COI on request
⌖ HQ · Levittown, NY
9-mile radius
Old Bethpage sits 5.1 miles inside our 9-mile service zone.
Transparent Old Bethpage pricing
Real numbers, before any work starts
No surprise charges, ever. Old Bethpage homeowners see the full repair or install price in writing first.
Diagnostic visit
$199–$199
Waived with approved repair
AC capacitor replacement
$245–$420
Most-common summer fix
Furnace ignition repair
$285–$595
Igniter, flame sensor, board
AC tune-up
$189
Spring-special pricing
Furnace tune-up
$209
Includes safety inspection
Central AC install
From $7,200
$0 down on approved credit
Final pricing in Old Bethpage confirmed in writing after on-site diagnosis. No work begins without your approval.
Brands serviced in Old Bethpage
We service every major HVAC brand
No matter what's installed in your Old Bethpage home — we have parts, training, and dealer relationships for it.
CarrierTraneLennoxRheemGoodmanBryantAmerican StandardYorkMitsubishiDaikinFujitsuLGBoschWeil-McLainBurnhamLochinvarNavienBuderusPeerlessSlant/FinBradford WhiteA.O. Smith
What neighbors say
Long Island homeowners trust us
"Had my furnace maintenance done and I’m very happy with the service. The technician was friendly, professional, and took the time to check everything carefully. He explained what he was doing and made sure the furnace was running properly before he left. I’m in Hicksville and it’s nice to find someone local who is reliable and does good work. I would definitely recommend them for furnace maintenance or HVAC service."
Narendra Subedi
Hicksville, NY · Furnace maintenance
"I had a fantastic experience withLong Island HVAC Repair! My ac system was struggling to cool and I noticed a frozen line near the unit. I called for an emergency repair and they were at my home in 90 mins. The technician was professional, quickly located the leak, and had the system running perfectly in no time. Highly recommend for any local Levittown heating repairs!"
Pabitra Pun Bhattarai
Levittown, NY · Emergency AC repair
FAQs
Old Bethpage HVAC questions, answered
Can a ductless mini-split cool my detached garage or pool house in Old Bethpage?+
Yes, and it's often the cleanest approach. Those buildings were never part of the main duct system, and extending trunk lines to them tends to starve the rest of the house. A dedicated ductless zone conditions the outbuilding on its own, quietly, without touching the existing system. In Old Bethpage we size it to how the space is actually used.
Our Old Bethpage house still has an oil tank. How do we know if gas is an option?+
Start at the street. Some Old Bethpage blocks have natural gas and others still rely on oil or propane, so what is available at the curb sets your options. We look at the age of the burner and tank before suggesting anything, and we raise a conversion only when the numbers work for your house, not as a default.
My Old Bethpage house has a sunroom addition. Replace the central AC or add a separate unit?+
Look at the glass first. A sunroom with large windows and its own roofline takes in sun the central system was never sized to handle, so in Old Bethpage a dedicated wall head often holds that room steadier than stretching the main system to reach it. We compare the load for both approaches and tell you which one the numbers favor.
Do you provide HVAC service in Old Bethpage, NY?+
Yes — Old Bethpage (ZIP 11804) is well within our 9-mile service radius. We're just 5.1 miles away, so Old Bethpage addresses usually get same-day appointments.
How fast can you get to my Old Bethpage home for emergency service?+
For complete no-heat or no-cool emergencies in Old Bethpage, our 24/7 dispatch typically gets a technician on the way within 60–90 minutes. Standard same-day service is available almost every day.
What credentials and insurance do you carry in Old Bethpage?+
We're fully insured for residential HVAC work in Old Bethpage and across Long Island, and our technicians are EPA 608–certified. We provide current insurance and certification documentation on request.
How much does AC or furnace repair cost in Old Bethpage?+
Our diagnostic visit in Old Bethpage is a flat $199, waived when you approve the repair. Most common AC and furnace repairs — capacitors, ignitors, flame sensors, contactors, blower motors — run $180–$650 all-in with upfront flat-rate pricing before any work starts. Bigger jobs like refrigerant leak repair or a blower replacement are quoted on the spot, and if a repair no longer makes sense on an older system we'll show you repair-vs-replace numbers side by side.
Do you offer financing for Old Bethpage homeowners?+
Yes — through Synchrony Home Financing. Old Bethpage homeowners can apply for $0 down on approved credit, with monthly plans and full terms in writing before you sign.
What rebates can I get on a new system in Old Bethpage?+
Old Bethpage is in PSEG Long Island's service territory. PSEG runs incentive programs for qualifying cold-climate heat pumps and high-efficiency central AC; amounts and eligibility change by program year and household income, so check PSEG Long Island's current terms before you buy.
Dedicated Old Bethpage service pages
Nearby service areas
Towns near Old Bethpage we also serve
Need HVAC service in Old Bethpage?
Call now and we'll dispatch a technician — usually same-day across Old Bethpage and ZIP 11804.