HVAC Tips & Guides for Long Island Homes
The K2 blog is a library of heating, cooling, heat pump and indoor air quality guides for Long Island homeowners, written by the technicians at K2 Cooling & Heating in Deer Park. Browse by topic below, or start with the newest articles; if you need help with your own system, call (631) 414-7141.
Boiler Won't Restart After a Power Outage? Safe Reset Steps and When to Call
Most boilers restart on their own after a power outage. When yours doesn't, these are the safe checks to make, what one reset can fix, what never to do, and when to call.
Steam Radiators Banging or Not Heating? Causes and Fixes for Long Island Homes
Banging pipes and cold radiators in a steam system usually come down to trapped water, stuck air vents, the boiler's water level or its pressure. Here's how to tell which.
Upstairs Rooms Cold in Winter? Why Heat Is Uneven Between Floors
Heat rises, yet the bedrooms are cold. Here's why two-floor Long Island homes heat unevenly, from attic ducts and missing returns to air-bound boiler zones, and the fixes that work.
High-Efficiency Furnace Shutting Off in the Cold? Check the Condensate Line and Vents
A 90%+ furnace makes water and breathes through PVC pipes. When either freezes or gets buried in snow, the furnace shuts itself off. Here's what to check.
How to Keep Boiler and Baseboard Pipes From Freezing on Long Island
Baseboard pipes along outside walls are the first to freeze when a boiler stops. Here's what puts them at risk, how to protect them and what to do if the heat goes out.
Should You Turn the Heat Down at Night? Furnaces, Boilers and Heat Pumps Compared
Turning the thermostat back while you sleep saves money with most heating systems. Here's how much, and why heat pumps and some boilers need a different approach.
Why Does My Furnace Turn On and Off Every Few Minutes?
A furnace that starts, runs a few minutes and shuts off is short cycling. Here are the usual causes, from a dirty filter to a dirty flame sensor, and what you can check.
Heat Pump Water Heaters on Long Island: Will One Fit Your Basement?
Heat pump water heaters move heat from basement air into your tank. Here's what the space needs, what PSEG Long Island offers, and what K2 does for water heaters.
Air-to-Water Heat Pumps for Long Island Baseboard and Radiant Homes
Air-to-water heat pumps feed your existing hot-water pipes, but standard baseboard sized for boiler water can come up short on cold days. Here's who they suit and the alternatives.
Oil Tank Removal on Long Island: What Homeowners Need to Know
What NYSDEC says about closing a home heating oil tank, who to check with in Suffolk and Nassau, and what happens to the tank when you switch to gas or a heat pump.
Is Natural Gas Available on My Street? A Long Island Guide
How to check whether National Grid can bring gas to your Long Island house, what the new-service steps and timeline look like, and your options if gas isn't available.
PSEG Long Island Rate 580: The Heat Pump Rate, Explained
Rate 580 lowers the October-to-May delivery energy charge above 400 kWh a month for homes heated entirely by a heat pump. Here's the math, the rules and how to apply.
Do You Need a Permit to Replace Your HVAC on Long Island? A Town-by-Town Guide
Who issues an HVAC permit on Long Island depends on whether you live in a hamlet or an incorporated village. Here's how it works in Babylon, Islip, Huntington, Smithtown, Oyster Bay and Hempstead.
Baseboard Heat Not Working in One Room? Air, Boiler Pressure and Zones Explained
Many Long Island homes heat with hot water baseboard. When one room stays cold, the cause is usually trapped air, low boiler pressure or a stuck zone valve. Here's how to tell which one.
Carbon Monoxide and Your Heating System: What Long Island Homeowners Need to Know
If your Long Island home has a gas or oil furnace, boiler or water heater, New York law requires carbon monoxide alarms. Here's where they go, what causes CO, and what to do if one sounds.
Commercial Rooftop Unit (RTU) Maintenance Checklist for Long Island Businesses
Most small commercial buildings on Long Island run on rooftop units. Here's what a proper RTU maintenance visit covers in spring and fall, how often to schedule it, and the costly failures it prevents.
Why Your House Feels Sticky Even When the AC Is Running
A house can feel sticky with the AC running because cooling and dehumidifying are separate jobs: a system that reaches the thermostat setting quickly and shuts off leaves the moisture behind. Oversizing, a fan set to ON, leaky attic ducts and a dirty coil are the usual causes.
Stop Flipping Between Heat and AC on the Same Day
Switching between heat and AC on the same day will not damage a furnace. The one real risk is restarting the air conditioner within a few minutes of it shutting off. AUTO mode with a wide gap between the heating and cooling setpoints stops the flipping.
Emergency Replacement vs. Planned Replacement: Same System, Different Outcome
The best time to replace an HVAC system on Long Island is March through April, with September through October second. An emergency replacement costs about the same in equipment, but you lose the sizing, tier, duct work, incentive and financing decisions that make a system work well for fifteen years.
Why Your HVAC Warranty Might Already Be Void
Most HVAC warranties cover parts only, require registration within a set window, and require documented annual professional maintenance. Missing registration is the most common way coverage is lost, and you usually only find out when you file a claim.
The Biggest Cooling Upgrade You Can Make (It's Probably Not a New AC)
For most Long Island homes with attic ductwork, sealing the return ducts is the biggest cooling upgrade per dollar, followed by attic air sealing and insulation. New equipment comes after, sized with a load calculation once the ducts and attic are fixed.
Do Heat Pumps Actually Work Through a Deer Park Winter?
Yes. A properly selected cold-climate heat pump will heat a Long Island home through a normal winter. Whether it saves money depends on what you heat with now: it usually beats oil, propane and electric baseboard, and is often roughly a wash against natural gas.
What We Actually Do in an AC Tune-Up
A proper AC tune-up cleans and inspects the indoor and outdoor units and then measures performance: refrigerant charge by superheat and subcooling, static pressure, temperature split, capacitor value and amp draws. Those readings, written down, are what separate a tune-up from a quick look.
Does HVAC Brand Matter? Why It Comes Third
HVAC brand matters less than most homeowners think. Correct sizing comes first and installation quality second; brand is a genuine third, mainly for local parts availability, technician familiarity, warranty handling and the range within the line.
About the K2 Blog
What HVAC topics does the K2 blog cover?
Our blog covers air conditioning, heating, heat pumps and ductless mini-splits, indoor air quality, and Long Island homeowner planning topics such as costs, maintenance and choosing a contractor, written by K2 technicians in Deer Park.
How do I find articles on one topic?
Use the topic links at the top of the blog. Each topic page lists every article on that subject, from AC troubleshooting to boiler maintenance and heat pump sizing.
Can I request a specific HVAC topic or maintenance guide?
Yes. If you have a question about heat pumps, ductless systems, furnace maintenance or anything else, contact our team at (631) 414-7141 and we may cover it in an upcoming article.
Need Professional Heating or Cooling Help?
From emergency AC and furnace repairs to maintenance plans and Rheem KwikComfort financing, K2 Cooling & Heating serves homes within 15 miles of Deer Park, 24/7.