B and H Mechanical - Exton's Qualified HVAC Services

A common cause is a clogged condensate drain line, especially in our humid Pennsylvania summers. First, turn off your system to prevent water damage. You can try clearing the accessible part of the PVC drain line with a wet/dry vacuum. For a thorough cleaning and to prevent mold or system shutdown, it's best to call B and H Mechanical. We'll clear the blockage, treat the line to inhibit future growth, and check the condensate pump if you have one.

Thermostat malfunctions are a frequent issue here. Start by checking the batteries if it's a digital model. Ensure the system switch is set to 'Heat' or 'Cool' (not 'Off') and the temperature setting is correct. If it's still unresponsive, the problem could be a tripped circuit breaker, a blown fuse at the air handler, or faulty wiring. Our technicians at B and H Mechanical can diagnose whether it's a simple thermostat replacement or a deeper electrical issue with your HVAC system.

Proactive maintenance is key. We recommend scheduling a professional tune-up twice a year—in spring for your AC and fall for your heater. This service includes cleaning the condensate drain to prevent clogs, checking thermostat calibration and wiring, and inspecting all system components. Changing your air filter monthly also protects your system. As your local Exton HVAC experts, B and H Mechanical offers maintenance plans to help you avoid unexpected breakdowns and extend the life of your equipment.