Voyager

Musty odor from vents is microbial growth on the evaporator coil or in the drain pan. Clean and disinfect the coil and pan. Install a UV-C lamp to prevent recurrence.

A frozen coil means either blocked airflow or low refrigerant charge. Run the fan-only defrost cycle first, then address the root cause before restarting cooling.

Dirty condenser coils raise head pressure and increase compressor work. A 10% reduction in condenser airflow adds roughly 5% to energy consumption. Clean coils at least annually.

Low suction pressure with high superheat confirms low refrigerant charge from a leak. Locate the leak first. Adding refrigerant without fixing the leak is a temporary fix and an EPA violation.

Short cycling compressors wear out quickly. Check thermostat location for false load signals and verify the compressor minimum off-time delay is active in the controls.

Uneven temperature is almost always a duct leak, a closed damper, or a disconnected branch duct. Walk the duct system and check each branch damper position before balancing.

Metallic noise from a rooftop unit is usually a loose or bent fan blade. Check the condenser fan blades and set screws before suspecting the compressor.

Water overflow is almost always a clogged condensate drain line. Flush the drain with a wet-vac, clean the pan, and verify the P-trap is correctly primed.