Common HVAC Problems We Diagnose and Repair
Heating and cooling problems can show up in different ways, but the visible symptom is not always the source of the failure. Tony Kelly Heating & Air Conditioning uses system testing and hands-on diagnostics to identify what is affecting performance before recommending a repair.
Warm Air Is Coming From the Vents
Warm or room-temperature air can be caused by thermostat settings, restricted airflow, electrical failures, low refrigerant, frozen coils, or problems with the outdoor unit. Our technicians test the system to find the cause instead of replacing parts based on guesswork. Cooling-specific problems may require dedicated air conditioning repair.
The HVAC System Will Not Turn On
A system that does not start may have a tripped breaker, damaged capacitor, failed contactor, thermostat problem, loose electrical connection, or control-board issue. We inspect the electrical and mechanical components involved and explain what failed before beginning approved repairs.
Airflow Feels Weak or Uneven
Weak airflow can result from a clogged filter, blower motor problem, dirty coil, damaged ductwork, blocked return, or an improperly balanced system. Our team evaluates airflow throughout the equipment and duct system to determine where performance is being lost.
The System Keeps Turning On and Off
Frequent starts and stops, often called short cycling, place added stress on HVAC components and make it harder to maintain a steady indoor temperature. Common causes include thermostat issues, restricted airflow, frozen coils, electrical problems, and equipment that is not operating within the correct pressure or temperature range.
The HVAC System Is Making Unusual Noises
Buzzing, rattling, grinding, squealing, or banging sounds can point to loose parts, motor problems, failing bearings, electrical issues, damaged fan blades, or compressor trouble. New or worsening noises should be checked before the underlying failure causes more extensive damage.
The Heating System Is Not Keeping Up
Poor heating performance may involve the heat pump, backup heat strips, thermostat, blower assembly, electrical controls, or airflow through the home. Our technicians diagnose the full heating system and can direct customers with heating-specific concerns to the appropriate heater repair service.
Water Is Collecting Around the Indoor Unit
Water near the air handler often points to a clogged condensate drain, damaged drain pan, frozen evaporator coil, or condensate pump problem. Drain issues are especially common during North Florida’s long, humid cooling season and should be addressed before moisture damages nearby materials.
The Thermostat Is Not Responding
Thermostat problems can come from incorrect calibration, wiring faults, damaged sensors, power loss, or communication failures between the thermostat and HVAC equipment. We test the controls and connected components to determine whether repair, recalibration, or replacement is appropriate.
Indoor Humidity Remains High
High humidity can signal low refrigerant, poor airflow, oversized equipment, short cycling, or an HVAC system that is not removing moisture effectively. We first evaluate system performance and operating conditions. Homes that need additional moisture control may benefit from a whole-home dehumidifier.
Dust, Stale Air, or Airflow Problems Persist
Dirty filters, leaking ducts, damaged ductwork, buildup inside the system, and airflow restrictions can affect both comfort and indoor air quality. Our technicians look for repair-related airflow problems first. Additional concerns may be addressed through air duct cleaning or other indoor air quality services.
A Commercial HVAC System Keeps Breaking Down
Repeated equipment failures can interrupt operations, affect customers, and make indoor conditions difficult for employees. We provide repair support for select light commercial systems. Larger properties and specialized equipment needs can be reviewed through our commercial HVAC services.
The System Has Completely Shut Down
A complete loss of heating, cooling, or airflow may involve electrical failure, a damaged control board, motor trouble, safety controls, or another major component. Same-day appointments are available when scheduling allows, and urgent requests are prioritized during extreme temperatures and complete system failures.
Preparing Your HVAC System for Tallahassee’s Summer Heat
