Donahue Heating & Cooling: Expert HVAC Repair Serving Saint Louis, MO 63146

That's often a clogged condensate drain line, a frequent issue in our humid Saint Louis summers. The drain removes condensation from your AC, and when it clogs with algae or debris, water backs up. Donahue technicians perform a thorough drain line cleaning to clear the blockage, prevent water damage, and restore proper system function.

Thermostat malfunctions are common here and can stem from wiring issues, dead batteries, or calibration drift. Donahue's experts will first diagnose your thermostat. If it's faulty, we can expertly install a reliable replacement or upgrade you to a programmable or smart model for better comfort and energy savings tailored to our local weather patterns.

Our preventative maintenance is designed for Saint Louis homes. It includes inspecting and cleaning critical components like the condensate drain to prevent clogs, testing thermostat calibration and wiring, checking refrigerant levels, and ensuring all system parts are working efficiently. This proactive service helps avoid the most frequent breakdowns we see in the area.