Donmar Heating, Cooling & Plumbing | Professional HVAC Repair in Rockville, MD

First, check your thermostat settings and air filter, as a dirty filter is a common culprit. If that doesn't help, it could be an issue like a refrigerant leak or a failing compressor. Donmar's NATE-certified technicians are experienced with the specific strain Rockville's summer heat puts on AC systems. We provide prompt, flat-rate diagnostics and repair to restore your cooling efficiently and help prevent future breakdowns during peak season.

A recirculation pump provides instant hot water to your faucets and showers, eliminating the wait and conserving water. It's a great upgrade for larger homes or to improve convenience. Yes, our licensed plumbers at Donmar are experienced in both the installation and repair of these systems. We can assess your home's plumbing layout and recommend an efficient solution tailored to your household's needs.

Being a Carrier Factory Authorized Dealer means our technicians receive direct, specialized training from the manufacturer. This allows us to properly install, configure, and service Carrier equipment to ensure it performs at its peak efficiency and reliability. For your installation, it means access to a wide range of energy-efficient Carrier systems, expert setup, and the assurance that the work meets the manufacturer's strict standards for warranty coverage and long-term performance.