Split Systems & VRF Units in NYC
Learn about common issues with Split Systems & VRF Units in NYC and what you can fix yourself versus when to call the pros at SIBAIR.

Your Guide from SIB AIR, Manhattan’s Trusted HVAC Specialists
When winter hits Manhattan, a reliable heating system is a must. From historic brownstones to high-rise apartments and commercial spaces, furnaces and boilers keep New Yorkers warm and safe through freezing temperatures. That’s why professional furnace and boiler service is so important for homes and businesses in the city.
Even well-maintained systems can run into problems. Knowing what to look for, when to handle small tasks, and when to call the experts can prevent costly breakdowns and keep your space comfortable. At SIB AIR, we’ve installed, repaired, and maintained heating systems across Manhattan. Here’s a guide to the most common issues and solutions.
Why it happens: Blocked radiators, air trapped in pipes, or poor system balancing.
What you can try: Make sure vents or radiators aren’t blocked and adjust thermostat settings.
When to call SIB AIR: If uneven heating continues, your system may need professional balancing, vent bleeding, or upgrades.
Why it happens: Loose components, sediment buildup in the boiler, or worn parts in the furnace.
What you can try: Check air filters and confirm nothing is blocking airflow.
When to call SIB AIR: Banging, whistling, or rumbling sounds often point to serious mechanical or boiler issues that require professional service.
Why it happens: Electrical faults, pilot light problems, or thermostat issues.
What you can try: Reset the breaker, check the thermostat, and relight the pilot if it’s safe to do so.
When to call SIB AIR: If the system still won’t start, our licensed technicians can diagnose and repair the cause quickly.
Why it happens: Dirty filters, blocked burners, or low water levels in boilers.
What you can try: Replace filters regularly and check system settings.
When to call SIB AIR: If heating stays weak, it could be a fuel, burner, or mechanical issue that needs professional attention.
Why it happens: Inefficient operation due to dirty burners, leaks, or failing components.
What you can try: Clean or replace filters and ensure thermostats are programmed correctly.
When to call SIB AIR: If bills remain high, we’ll perform a full efficiency check and restore your system’s performance.
Do this regularly:
Avoid these mistakes:
At SIB AIR, we know how important reliable heat is for New Yorkers. Our licensed technicians specialize in furnace and boiler installation, repair, and maintenance, handling everything from routine checkups to emergency service. We’re dedicated to keeping homes and businesses safe, warm, and efficient during the coldest months.
With SIB AIR you can expect:
Don’t let heating issues leave you in the cold. Whether you need boiler maintenance, furnace repair, or a system replacement, SIB AIR is your go-to team in Manhattan.
📞 Call us now at (347) 407-7530
SIB AIR – Smart Heating Solutions for the City That Never Sleeps
Every Sib Air technician is fully trained, licensed, and background-checked. We respect your property, communicate clearly, and leave every job site cleaner than we found it.
Want to schedule a professional team visit? Fill in the form below and let us take it from there
Want to schedule a professional team visit? Fill in the form below and let SIB AIR take it from there