Lanark Mechanical LLC - Annandale's Professional HVAC Repair

It could be. A faulty reversing valve is a common culprit when a heat pump struggles to change modes, often causing it to blow cool air when set to heat, or vice versa. This is a frequent issue in Annandale, especially with older systems. Our technicians will perform a thorough diagnostic to check the valve's electrical solenoid and mechanical operation. We'll provide a clear explanation of the problem and your repair options to get your home's temperature back under control efficiently.

Key signs include weak or no airflow from your vents, unusual humming or grinding noises from the air handler, and the system frequently overheating and shutting off. Since proper airflow is critical for both heating and cooling, a failing motor can make your Annandale home uncomfortable and strain the entire system. We recommend prompt inspection. Our team can often repair the motor, but if a replacement is needed, we use high-quality parts to ensure reliable, long-lasting performance.

Regular professional maintenance is the best defense. Our local tune-ups include checking electrical components, lubricating moving parts like motors, and testing system pressures—all of which can catch small issues with reversing valves or blower motors before they lead to a breakdown. We also advise keeping vents clear and changing air filters regularly. Staying proactive with service helps avoid the stress and discomfort of sudden failures, especially during our peak heating and cooling seasons.