HVAC Repair in St. Louis | Thermostat & Duct Leak Services | P.M. Heating & Cooling

Common signs include your St. Louis home not reaching the set temperature, the system short-cycling, or a blank display. Before calling us, check the batteries and circuit breaker. If issues persist, our technicians can diagnose wiring problems, sensor failures, or outdated units and provide a precise repair or recommend an upgrade for better efficiency.

Older St. Louis homes often have aging ductwork in attics or crawlspaces that can deteriorate, disconnect, or develop gaps over time. These leaks force your system to work harder, increasing energy bills and reducing comfort. We perform thorough inspections and use professional sealing methods to ensure conditioned air reaches every room efficiently.

Absolutely. Leaky ducts in unfinished spaces like basements or attics can pull in dust, allergens, and musty air, circulating them throughout your home. By properly sealing your ductwork, we help prevent this contamination, which is especially helpful during St. Louis's high-pollen seasons, leading to cleaner, healthier air for your family.