Fast, Reliable Heat When You Need It Most

When Connecticut winter temperatures drop, the last thing any homeowner wants is a furnace or boiler that suddenly quits. At A&S Nathan Heating and Cooling LLC, we provide quick, dependable heating repair in Shelton, CT, restoring comfort fast and keeping your family safe. From older hydronic systems to modern high-efficiency units, our technicians have the training and experience to service every heating type and fuel source. As a family-owned business since 2000, we’ve built our reputation on honesty, quality workmanship, and reliable local service.

We Repair All Heating Systems

Gas & Oil Furnaces – Ignition, airflow, and control issues repaired fast.
Boilers (Steam & Hot Water) – Leaking, pressure loss, and uneven heat corrected.
Propane Systems – Burner and combustion tune-ups for safety and efficiency.
Heat Pumps & Hybrids – Electrical, refrigerant, or defrost faults diagnosed accurately.
Ductless Mini-Splits – Zoning or communication errors repaired.

Our trucks are fully stocked for same-day repairs whenever possible.

Common Problems We Fix

Furnace blowing cold air or short-cycling
Noisy or rattling equipment
Thermostat not responding
Uneven heating between rooms
High utility bills without higher usage

Each visit includes a full diagnostic and up-front pricing before any work begins.

Local Service You Can Trust

Based in Ansonia, CT, we proudly serve Shelton, Derby, and Seymour. Whether it’s a colonial in Huntington or a ranch near downtown, we understand Shelton homes and how to keep them comfortable through every season.

For sudden breakdowns, our 24/7 emergency heating repair service means help is only a call away.