"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
7.3 miles from our Levittown HQ
HVAC repair & installation in Hempstead, NY
Hempstead's pre-war two-families and multi-unit homes often share a single boiler. We diagnose tricky zone-balancing and replace aging cast-iron with modern condensing units. We bring trucks fully stocked with parts for every major brand serviced in Hempstead, so most repairs are completed on the first visit.
Same-day appointments available
Fully insured
Local crews, fast response
About HVAC service in Hempstead
Hempstead has the oldest and most mixed housing stock in our Nassau coverage — prewar homes, two-families, and conversions alongside postwar infill. We spend more time here verifying what a system was actually designed to serve than we do in the tract towns, because floor plans have frequently changed since installation. ZIP 11550, 7.3 miles from our Levittown shop.
Complete service menu
Every HVAC service we offer in Hempstead
All 13 services available across Hempstead — usually same-day for repairs, free in-home quotes for installs.
AC Repair in Hempstead
cooling · repair
Same-day cooling repairs most days across Long Island.
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AC Installation in Hempstead
cooling · install
High-efficiency central AC, sized and installed right.
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Ductless Mini-Split Installation in Hempstead
cooling · install
Room-by-room comfort with no ductwork required.
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AC Maintenance & Tune-Up in Hempstead
cooling · maintain
Annual tune-ups that prevent breakdowns and extend equipment life.
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Heating Services in Hempstead
heating · repair
Furnaces, boilers, and heat pumps — repaired, serviced, replaced.
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Furnace Repair in Hempstead
heating · repair
Emergency furnace repair, day or night.
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Furnace Installation in Hempstead
heating · install
High-efficiency furnaces that lower your gas bill.
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Boiler Repair & Installation in Hempstead
heating · repair
Boiler repair, cleaning and installation — steam, gas & combi.
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Heat Pump Installation in Hempstead
heating · install
Heat pump repair and installation — ducted & ductless.
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Water Heater Installation in Hempstead
heating · install
Tank, tankless, and heat-pump water heaters — installed right.
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Whole-Home Generator Installation in Hempstead
heating · install
Standby power sized and installed on Long Island.
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Emergency HVAC Repair in Hempstead
heating · repair
No heat. No AC. No waiting.
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Emergency Boiler Repair in Hempstead
heating · repair
Cold radiators. Leaking boiler. Call any hour.
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What we see in Hempstead
Common HVAC issues by season
We regularly service Hempstead year-round. Here's what tends to fail and when.
Summer in Hempstead
- Window units overloading old wiring — Homes without ducts lean on window units, and in older Hempstead buildings several running at once can strain aging electrical circuits on the hottest days.
- Hot converted attics — Attic rooms and conversions in older homes pick up heat from the roof and rarely have any real air distribution, so they stay uncomfortable late into the evening.
- Units sized for a changed floor plan — Subdivided or altered homes often run cooling equipment sized for the original layout, leaving some apartments or rooms underserved.
- Cooling without trunk lines — Plaster walls and tight framing make traditional ductwork impractical in many prewar houses, so cooling often depends on ductless heads instead.
Winter in Hempstead
- Uneven heat between apartments — With one boiler serving every unit, stuck radiator vents, undersized main vents, and poorly pitched returns leave one floor hot while another stays cold.
- No-heat control failures — Low-water cutoffs, aquastats, thermocouples, circulators, and gas valves are the usual culprits on cold-morning no-heat calls in older multi-unit boilers.
- Cracked or leaking cast iron — Old cast-iron boiler sections can crack or weep. When that happens, the question becomes replacement with proper near-boiler piping, not another patch.
- Thermostat wars between units — Without zone valves and separate thermostats per unit, one tenant's setting affects everyone, and fuel gets wasted heating overheated apartments.
Deep dive · Hempstead
Boiler repair in Hempstead, NY — shared and multi-unit heat
Much of Hempstead Village is pre-war two-family and multi-unit housing where one cast-iron boiler heats every apartment. When one floor is roasting and another is cold, the boiler usually isn't the problem — the distribution is. We fix the venting, piping, and controls that actually govern how heat lands in each unit.
Uneven heat between units
Steam systems need correctly sized main vents and free radiator vents. Replacing vents and re-pitching returns fixes most cold-apartment complaints for a fraction of a new boiler.
No heat calls
Low water cutoff, aquastat, thermocouple, circulator, and gas valve failures, diagnosed and usually repaired in a single visit.
Cast-iron replacement
When a boiler is cracked or leaking through the sections, we quote high-efficiency condensing replacements with proper near-boiler piping — the step most often skipped.
Zoning and controls
Adding zone valves and thermostats per unit ends the thermostat war and cuts fuel use across the building.
Cooling and water heaters in Hempstead
This hub covers boiler repair in depth and our Hempstead AC repair page handles cooling breakdowns. What is left is cooling for homes that never had ducts, plus hot water.
Cooling without ductwork
Ductless systems for prewar homes where running trunk line through plaster is neither practical nor affordable.
Two-family systems
We document which appliance serves which unit before work starts — shared equipment and shared flues are common here.
Water heater replacement
Tank swaps are usually same-day, with special attention to shared venting arrangements that no longer meet code.
Fresh load calculations
For converted or subdivided homes we recalculate rather than trusting the existing equipment size.
Why Hempstead chooses us
Local Long Island knowledge — not a national chain.
- Just 7.3 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
Hempstead sits 7.3 miles inside our 9-mile service zone.
Transparent Hempstead pricing
Real numbers, before any work starts
No surprise charges, ever. Hempstead 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 Hempstead confirmed in writing after on-site diagnosis. No work begins without your approval.
Brands serviced in Hempstead
We service every major HVAC brand
No matter what's installed in your Hempstead 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
Hempstead HVAC questions, answered
We rent out two floors in a Hempstead two-family. One apartment is roasting while the other is freezing. Is the boiler bad?+
Usually it is distribution, not the boiler. In Hempstead two-families heated by one cast-iron boiler, undersized main vents, stuck radiator vents, and poor return pitch cause most uneven heat. Fixing venting, piping, and controls costs a fraction of replacement and makes each unit more comfortable.
Before adding ductless cooling to my older Hempstead house, should the wiring be checked?+
Yes. Some older Hempstead houses still carry aging electrical systems, and a ductless setup needs a dedicated circuit and enough panel capacity. We look at the service panel and the circuit the outdoor unit would use before recommending heads, so the cooling you add does not overload wiring that was never meant for it.
Why does a technician in Hempstead want to confirm which appliance serves which unit before working?+
In Hempstead, shared equipment and shared flues are common in converted and multi-unit homes, and piping often no longer matches the original plan. Mapping what serves each apartment prevents shutting off heat to the wrong unit or disturbing a shared vent, particularly when replacing a water heater or boiler.
Do you provide HVAC service in Hempstead, NY?+
Yes — Hempstead (ZIP 11550) is well within our 9-mile service radius. We're just 7.3 miles away, so Hempstead addresses usually get same-day appointments.
How fast can you get to my Hempstead home for emergency service?+
For complete no-heat or no-cool emergencies in Hempstead, 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 Hempstead?+
We're fully insured for residential HVAC work in Hempstead 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 Hempstead?+
Our diagnostic visit in Hempstead 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 Hempstead homeowners?+
Yes — through Synchrony Home Financing. Hempstead 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 Hempstead?+
Hempstead 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 Hempstead service pages
Nearby service areas
Towns near Hempstead we also serve
Need HVAC service in Hempstead?
Call now and we'll dispatch a technician — usually same-day across Hempstead and ZIP 11550.