Trusted HVAC Services in Guilford, CT 06437 - J.J.Sullivan Oil and Propane

We provide full HVAC installation or replacement and repair services for all major systems, including furnaces, air conditioners, and heat pumps. Our team handles everything from assessing your home's needs to professional installation and ongoing maintenance, ensuring efficient and reliable heating and cooling tailored to Guilford's climate. We also offer annual tune-ups to keep systems running smoothly and extend their lifespan.

For refrigerant leaks in AC systems, our technicians perform thorough diagnostics to locate and seal leaks, then recharge the system with the correct refrigerant to restore cooling efficiency. For dirty condenser coils—a frequent problem due to local pollen and debris—we clean them during routine maintenance or emergency visits to prevent overheating and reduce energy costs. We recommend annual AC tune-ups to catch these issues early and keep your system running reliably.

We provide propane delivery for heating, cooking, and other residential uses, with automatic delivery based on your usage patterns and local weather to ensure you never run out. Our service includes tank monitoring, safe refills, and 24/7 emergency support. As a full-service provider, we also handle propane system installations and maintenance, all backed by our long-standing commitment to keeping Southern Connecticut homes warm and comfortable.